Maryland's environmental engineering companies are vital to addressing ecological challenges across the region. These firms innovate methods for waste management, water quality improvement, and sustainable infrastructure. They play a crucial role in developing strategies amid climate change, regulatory pressures, and public health concerns, ensuring projects are compliant and environmentally responsible. With the increasing urgency for sustainable practices, the industry is evolving, emphasizing greater collaboration with communities and advancing technologies to enhance environmental performance. This shift signals a growing recognition of the importance of ecological stewardship in both public and private sectors.


The companies featured in this list range in size from small firms to large organizations, reflecting a spectrum of expertise. They are headquartered in various Maryland locations, with foundations extending back to the early 20th century. Each one specializes in segments of environmental engineering such as water resources management, ecological restoration, and environmental consulting. Notably, firms vary in structure and ownership type, from publicly traded entities to privately owned companies, showcasing Maryland's active engagement in the environmental sector.


Read on to discover key insights about top environmental engineering companies in Maryland.


Top 24 Environmental Engineering Companies in Maryland


1. Kci

  • Website: kci.com
  • Ownership type: Private
  • Headquarters: Sparks, Maryland, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Founded year: 1955
  • Headcount: 1001-5000
  • LinkedIn: kci-technologies-inc-

KCI Technologies, founded in 1955 and based in Sparks, Maryland, is a private engineering and consulting firm with a workforce of over 2,500 employees. The company specializes in various services, including construction management, environmental engineering, and technology solutions. KCI serves a broad spectrum of clients, including government agencies and private sector companies, with a strong emphasis on infrastructure development and sustainability. Their environmental engineering division offers comprehensive services that cover hazardous waste management, water resources, and ecological restoration. KCI is committed to integrating sustainable practices into their projects, ensuring compliance with environmental regulations while enhancing public safety. Their extensive experience in environmental management positions them as a significant player in the industry, capable of addressing the pressing environmental challenges faced by communities today.


2. Apex Companies, LLC

  • Website: apexcos.com
  • Ownership type: Venture Capital
  • Headquarters: Rockville, Maryland, United States (USA)
  • Employee distribution: United States (USA) 99%, Other 1%
  • Latest funding: February 2023
  • Founded year: 1988
  • Headcount: 1001-5000
  • LinkedIn: apex-companies-llc

Apex Companies, LLC, founded in 1988 and based in Rockville, Maryland, is a consulting and engineering firm that focuses on environmental solutions, water management, and infrastructure services. With a workforce of approximately 1,349 employees, Apex serves a wide array of clients, including public agencies and private enterprises. The firm provides expert guidance on regulatory compliance, project management, and sustainability initiatives. Apex is known for its commitment to community involvement and social responsibility, actively supporting local and national organizations. Their service offerings include stormwater management, environmental assessments, health and safety consulting, and infrastructure engineering. The company has also expanded its reach through strategic acquisitions, enhancing its expertise and service capabilities in the environmental sector.


3. EA Engineering, Science, and Technology, Inc., PBC


EA Engineering, Science, and Technology, Inc., PBC is an environmental consulting and engineering services firm based in Cockeysville, Maryland. Established in 1973, the company has built a reputation for providing comprehensive solutions to a variety of clients, including federal, state, municipal, and private sector entities. Their service offerings include contaminated site assessment and remediation, climate change adaptation strategies, and natural resource management. EA operates as a public benefit corporation, which underscores its commitment to sustainability and community engagement. The firm employs approximately 825 professionals who work collaboratively to tackle complex environmental challenges. Their focus on innovative solutions and technical expertise positions them as a significant contributor to the environmental engineering field, addressing pressing issues such as emerging contaminants and coastal resilience. EA's dedication to improving environmental quality is evident in their project work and community initiatives.


4. Straughan Environmental, Inc.


Straughan Environmental, Inc. is an environmental consulting and engineering firm based in Columbia, Maryland. Established in 1995, the company has built a reputation for providing comprehensive services that include environmental program management, construction management, and sustainable infrastructure solutions. Straughan serves a mix of government and commercial clients, focusing on innovative approaches to address pressing environmental challenges. Their expertise spans multiple sectors, including transportation, energy, and water/wastewater management. The firm is recognized for its commitment to sustainability, employing creative strategies to enhance project outcomes while minimizing costs and environmental impacts. With a dedicated team of engineers, planners, and scientists, Straughan is actively involved in various projects aimed at improving community resilience and environmental quality.


5. AMT Engineering

  • Website: amtengineering.com
  • Ownership type: Corporate
  • Headquarters: Rockville, Maryland, United States (USA)
  • Employee distribution: United States (USA) 99%
  • Latest funding: February 2022
  • Founded year: 1955
  • Headcount: 501-1000
  • LinkedIn: amt-engineering

A. Morton Thomas and Associates, Inc. (AMT) is an engineering consultancy based in Rockville, Maryland, with a history dating back to 1955. The firm operates as a 100% employee-owned company, employing around 347 professionals across 23 offices in nine states and Washington, D.C. AMT provides a wide array of services, including civil engineering, surveying, environmental services, and construction management. Their client base includes both government agencies and private developers, reflecting their versatility in handling various infrastructure projects. AMT is particularly noted for its commitment to sustainable and innovative solutions, which is evident in their environmental and water resources services. They have undertaken significant projects aimed at enhancing ecological health and water quality, demonstrating their active role in the environmental engineering sector.


6. Biohabitats

  • Website: biohabitats.com
  • Ownership type: Private
  • Headquarters: Baltimore, Maryland, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Founded year: 1982
  • Headcount: 51-200
  • LinkedIn: biohabitats

Biohabitats, based in Baltimore, Maryland, is an ecological consulting firm that specializes in ecological restoration, conservation planning, and integrated water strategies. Founded in 1982, the company has built a reputation for addressing environmental challenges through a combination of consulting and construction services. They work with municipalities, educational institutions, and non-profit organizations, providing expertise to restore ecosystems and promote sustainability. Biohabitats applies sound science and community input to tackle issues like habitat degradation and climate change. Their projects include river and stream restoration, wetland restoration, and the design of green infrastructure, reflecting their commitment to ecological stewardship and innovative solutions. The company also engages in research and development through its Bioworks initiative, which aims to advance practices in ecological restoration and conservation. With a dedicated team and a focus on collaboration, Biohabitats continues to contribute significantly to the field of environmental engineering.


7. Whitman, Requardt and Associates, LLP

  • Website: wrallp.com
  • Ownership type: Private
  • Headquarters: Baltimore, Maryland, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Founded year: 1915
  • Headcount: 501-1000
  • LinkedIn: whitman-requardt-and-associates-llp

Whitman, Requardt and Associates, LLP (WRA) is a private engineering and architectural firm based in Baltimore, Maryland, with a workforce of approximately 721 employees. Established in 1915, WRA has built a reputation for delivering high-quality, innovative, and sustainable infrastructure projects. The firm specializes in a range of services, including construction management and environmental solutions, serving both government agencies and private businesses. WRA has been instrumental in numerous projects that enhance community quality of life, particularly in the water and wastewater sector. Their notable work includes the upgrade of the Back River Wastewater Treatment Plant, which focuses on reducing nitrogen and phosphorus levels to meet state environmental goals. WRA's commitment to sustainability and community service is reflected in their project approach and long-standing relationships with clients.


8. CCG, A Morrison Hershfield Company


CCG, A Morrison Hershfield Company, based in Baltimore, Maryland, is a private engineering firm founded in 1992. The company specializes in environmental services and infrastructure development, catering to both government and private sector clients. CCG focuses on addressing complex engineering challenges while prioritizing sustainability and compliance with environmental regulations. Their services include climate change mitigation, environmental assessments, and solid waste management, among others. CCG is part of Morrison Hershfield, which has a long-standing history of excellence in engineering solutions. This affiliation allows CCG to leverage a broader range of expertise and resources, enhancing their ability to deliver impactful projects. The firm operates with a strong emphasis on client satisfaction and employee ownership, fostering a culture of accountability and commitment to quality.


9. Environ-Civil Engineering Ltd

  • Website: ece-ltd.com
  • Ownership type: Private
  • Headquarters: Columbia, Maryland, United States (USA)
  • Employee distribution: United States (USA) 73%, Taiwan 14%, Iraq 14%
  • Founded year: 1992
  • Headcount: 11-50
  • LinkedIn: environ-civil-engineering-ltd

Environ-Civil Engineering Ltd, based in Columbia, Maryland, is a private engineering consulting firm that specializes in environmental, water, and wastewater management. Founded in 1992, the company has built a solid reputation over the years, providing high-quality engineering services to a variety of clients, including municipal, state, and federal entities. Their service offerings include water distribution, wastewater treatment, environmental management, and construction management. The firm is recognized as a Minority Business Enterprise (MBE) and has certifications across several states, enhancing its credibility in the industry. ECE has participated in significant projects, such as the Piscataway Water Resource Recovery Facility Bio-Energy Project, showcasing their capability in advanced environmental solutions. With a team of qualified engineers and a commitment to enhancing environmental quality, ECE continues to play a vital role in addressing infrastructure and environmental challenges.


10. NMP Engineering Consultants, Inc.


NMP Engineering Consultants, Inc., founded in 2002 and based in Cockeysville, Maryland, is a private engineering consultancy that specializes in water resources engineering, environmental services, and construction management. With a team of approximately 54 employees, the firm has established itself as a reliable partner for both government agencies and private sector clients. NMP Engineering is particularly noted for its expertise in stormwater management, erosion and sediment control, and compliance with environmental regulations. The company has a strong track record of managing projects that require detailed understanding of Maryland's environmental laws and standards. Their services include planning, engineering, permitting, and construction management, all aimed at minimizing environmental impacts while ensuring project success. NMP Engineering's client list includes various governmental bodies, showcasing their active role in public sector projects. The firm is also recognized for its commitment to quality and integrity, as reflected in its mission statement and core values.


11. Chesapeake Environmental Management, Inc.


Chesapeake Environmental Management, Inc. (CEM) is a private company based in Bel Air, Maryland, specializing in environmental management and engineering services. Established in 1993, CEM has built a reputation for providing technical solutions that enhance community infrastructure and address environmental challenges. The company offers a variety of services, including construction monitoring, land surveying, geospatial analysis, contamination prevention and mitigation, and resource assessment and permitting. CEM serves a range of clients involved in infrastructure projects, focusing on contamination prevention and resource assessment. Their commitment to community engagement is evident through their charitable initiatives, where they aim to share $1 million with nonprofits by 2025. CEM is also recognized as a certified woman-owned and minority business enterprise, which positions them favorably in the industry. Their accolades, such as the Award of Merit from the County Engineers Association of Maryland, further underscore their contributions to environmental engineering and community development.


12. SuYash Consulting, LLC.

  • Website: suyashconsulting.com
  • Ownership type: Private
  • Headquarters: Columbia, Maryland, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Founded year: 2015
  • Headcount: 11-50
  • LinkedIn: suyash-consulting

SuYash Consulting, LLC, founded in 2015 and based in Columbia, Maryland, is a civil and environmental engineering consulting firm. With a team of 18 employees, the company serves both public and private clients, helping them navigate complex regulatory landscapes and improve infrastructure. SuYash Consulting offers a variety of services, including project management, structural inspections, and environmental permitting. Their expertise particularly shines in water resources, where they develop strategies for stormwater management and erosion control. The firm is recognized as a Minority Business Enterprise and holds several certifications, including MDOT MBE/DBE/SBE. SuYash has worked on over 100 projects across multiple states, demonstrating their capability and commitment to enhancing environmental quality and community safety. Their mission focuses on engineering innovative solutions for a cleaner environment and safer transportation infrastructure, reflecting their dedication to sustainable practices.


13. Soltesz

  • Website: solteszco.com
  • Ownership type: Private
  • Headquarters: Rockville, Maryland, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Founded year: 1980
  • Headcount: 51-200
  • LinkedIn: soltesz

Soltesz is a private engineering firm based in Rockville, Maryland, founded in 1980. With a workforce of approximately 144 employees, the company provides a range of services that include civil engineering, land development, environmental engineering, surveying, and urban planning. Soltesz serves both public and private sector clients, focusing on innovative solutions to complex regulatory and environmental challenges. Their projects often involve critical environmental considerations, such as water resource management and sustainable land use planning. The firm is also engaged in community initiatives, showcasing their commitment to enhancing local environments and public safety. Soltesz operates multiple offices in Maryland, reinforcing their presence in the Mid-Atlantic region.


14. Geo-Technology Associates, Inc. (GTA)

  • Website: gtaeng.com
  • Ownership type: Private
  • Headquarters: Abingdon, Maryland, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Founded year: 1985
  • Headcount: 501-1000
  • LinkedIn: geo-technology-associates-inc-gta-

Geo-Technology Associates, Inc. (GTA) is an engineering consulting firm based in Abingdon, Maryland, established in 1985. The company specializes in geotechnical, environmental, and construction consulting services, catering to a wide range of clients, including businesses and government agencies. With a workforce of approximately 500 engineers, geologists, scientists, and technicians, GTA operates through a decentralized model, maintaining 24 offices across the Mid-Atlantic, Midwest, and Southeast regions of the United States. Their environmental consulting services include Phase I and II Environmental Site Assessments, subsurface evaluations, and remedial design, showcasing their capability to tackle complex environmental issues. GTA's approach emphasizes client collaboration and innovative problem-solving, making them a valuable resource in the environmental engineering sector.


15. McCrone | Hartwell

  • Website: mccrone-engineering.com
  • Ownership type: Private
  • Headquarters: Annapolis, Maryland, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Founded year: 1937
  • Headcount: 11-50
  • LinkedIn: mccrone-inc-

McCrone | Hartwell is a civil engineering firm based in Annapolis, Maryland, with a history dating back to 1937. The company specializes in civil engineering, land planning, and surveying services, catering to a wide range of clients, including architects, developers, and government agencies. Their expertise extends to environmental engineering, particularly in water resources and wastewater management. McCrone's team is dedicated to providing innovative solutions to complex engineering challenges while ensuring compliance with regulatory standards. They actively engage in projects that promote sustainable design and environmental stewardship, reflecting their commitment to improving community infrastructure and addressing environmental needs. With a workforce of 43 professionals, McCrone combines decades of experience with a focus on delivering effective engineering solutions.


16. LRS Federal LLC

  • Website: lrsfederal.com
  • Ownership type: Private
  • Headquarters: Severna Park, Maryland, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Founded year: 2006
  • Headcount: 51-200
  • LinkedIn: lrs-federal-llc

LRS Federal LLC, based in Severna Park, Maryland, is a private engineering firm founded in 2006. With a workforce of 51-200 employees, the company specializes in construction management and civil engineering services, with a strong emphasis on environmental engineering. LRS Federal provides technical expertise in areas such as facility engineering, project management, and environmental compliance. They have worked extensively with federal and local government agencies, supporting projects that enhance infrastructure and promote sustainability. Their portfolio includes significant projects like sustainability and energy management program support for federal agencies, environmental assessments, and feasibility studies for electric vehicle infrastructure. LRS Federal is recognized as a Service Disabled Veteran Owned Small Business (SDVOSB), which adds to their credibility in the industry. Their commitment to quality and client satisfaction is evident in the positive feedback from various government clients, showcasing their ability to meet project requirements effectively.


17. Potomac-Hudson Engineering, Inc.

  • Website: phe.com
  • Ownership type: Private
  • Headquarters: Gaithersburg, Maryland, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Founded year: 1988
  • Headcount: 51-200
  • LinkedIn: potomac-hudson-engineering-inc.

Potomac-Hudson Engineering, Inc. (PHE) is an environmental consulting firm based in Gaithersburg, Maryland, with a focus on providing comprehensive services related to environmental analysis, compliance, and management. Founded in 1988, PHE has built a strong reputation over its 30+ years of operation, serving both federal and private sector clients. The firm specializes in navigating complex environmental challenges, including compliance with the National Environmental Policy Act (NEPA), environmental management systems, and site evaluations. PHE's technical expertise extends to areas such as remediation, climate change, and energy infrastructure. Their commitment to quality and responsiveness has made them a trusted partner for clients facing intricate environmental issues. PHE's team of engineers, scientists, and planners work collaboratively to deliver practical solutions that meet the needs of their clients while adhering to regulatory requirements.


18. Rk&k

  • Website: rkk.com
  • Ownership type: Private
  • Headquarters: Baltimore, Maryland, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Founded year: 1923
  • Headcount: 1001-5000
  • LinkedIn: rkk-careers

RK&K, founded in 1923 and based in Baltimore, Maryland, is a civil engineering firm that specializes in a wide range of services, including construction management, environmental consulting, and transportation solutions. With a workforce of approximately 1,795 employees, the company serves both public and private sector clients, focusing on infrastructure projects that demand innovative and collaborative approaches. RK&K has built a reputation for quality and teamwork, which is reflected in their extensive portfolio of projects. Their environmental services include critical work on wastewater treatment upgrades and stream restoration, showcasing their commitment to addressing environmental issues. The firm operates strategically across the Mid-Atlantic, Southeast, and South Central United States, positioning itself to tackle various engineering challenges while prioritizing sustainability in its operations.


19. BayLand Consultants & Designers, Inc.


BayLand Consultants & Designers, Inc. is an engineering and environmental consulting firm based in Hanover, Maryland, established in 1995. With a team of planners, engineers, and scientists, the company specializes in ecological restoration and the development of essential infrastructure projects located at or near the land-water interface. Their services cover a wide spectrum, including water resources management, stormwater management, and shoreline protection. BayLand is dedicated to smart and sensitive development around waterways, focusing on environmental restoration and ecological uplift of various aquatic ecosystems. The firm has successfully completed over 200 active projects and holds numerous open-end contracts, showcasing their ongoing engagement in the industry. They have received several awards for their work, highlighting their commitment to excellence in environmental engineering and consulting.


20. Daft-McCune-Walker, Inc.

  • Website: dmw.com
  • Ownership type: Private
  • Headquarters: Towson, Maryland, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Founded year: 1970
  • Headcount: 11-50
  • LinkedIn: daft-mccune-walker

Daft-McCune-Walker, Inc. (DMW) is a private professional services firm based in Towson, Maryland, established in 1970. With a workforce of approximately 31 employees, DMW specializes in land planning, civil engineering, and environmental consulting. The company serves clients across various sectors, including healthcare, education, and commercial development. DMW is particularly noted for its environmental compliance group, which ensures that projects adhere to evolving environmental regulations. Their services include preliminary environmental assessments, wetland and stream delineations, and stormwater management, showcasing their expertise in addressing environmental challenges. DMW's approach emphasizes innovative solutions that maximize land value while promoting sustainability. They have also achieved recognition for their community-building efforts, reflecting their commitment to enhancing the environments in which they operate.


21. CV, Inc.

  • Website: cvinc.com
  • Ownership type: Private
  • Headquarters: Gaithersburg, Maryland, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Founded year: 2009
  • Headcount: 11-50
  • LinkedIn: cv-inc.

CV, Inc. is an engineering and environmental consulting firm based in Gaithersburg, Maryland, established in 2009. The company operates with a small team of 11-50 employees, providing personalized service while leveraging extensive industry experience. CV, Inc. specializes in a range of services, including surveying, project management, environmental assessments, and sustainable site design. They have worked on various projects involving government agencies and private clients, ensuring compliance with regulatory requirements. Their environmental services include natural resources inventory, stream restoration design, and environmental site assessments, showcasing their commitment to environmental stewardship. The firm is also involved in infrastructure projects, offering expertise in civil engineering and construction management. CV, Inc. is recognized for its accountability and innovative approach to project execution, making it a notable player in the environmental engineering sector.


22. Environmental Research Group, LLC (ERG)

  • Website: envrg.com
  • Ownership type: Private
  • Headquarters: Baltimore, Maryland, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Founded year: 2000
  • Headcount: 51-200
  • LinkedIn: environmental-research-group-llc

Environmental Research Group, LLC (ERG) is an environmental consulting firm based in Baltimore, Maryland, founded in 2000. With a workforce of approximately 70 employees, ERG provides a range of environmental services, particularly to military and government clients. The firm specializes in environmental planning, compliance, and conservation, ensuring that projects meet regulatory standards while enhancing operational missions. ERG is recognized as a service-disabled veteran-owned and economically disadvantaged woman-owned small business, which positions it favorably in the market. The company has also expanded its capabilities through the acquisition of AmaTerra Environmental, further enhancing its conservation services. ERG operates with a strong commitment to sustainability, utilizing eco-friendly practices in its operations, including a solar-powered headquarters. This focus on environmental responsibility is integral to their mission of enriching lives and enhancing missions through effective environmental work.


23. Sheladia Associates, Inc.

  • Website: sheladia.com
  • Ownership type: Private
  • Headquarters: Rockville, Maryland, United States (USA)
  • Employee distribution: India 56%, United States (USA) 25%, Afghanistan 6%, Other 13%
  • Founded year: 1974
  • Headcount: 201-500
  • LinkedIn: sheladia-associates-inc.

Sheladia Associates, Inc., founded in 1974 and based in Rockville, Maryland, is a consulting firm that provides engineering and project management services for infrastructure development. The company serves government agencies and organizations, focusing on sectors such as transportation, water supply, and environmental management. With a global footprint, Sheladia has successfully managed over 1,000 projects across more than 80 countries, demonstrating their extensive experience in complex project management. Their commitment to sustainable practices is evident in their approach to environmental management, where they prioritize minimizing waste and pollution while enhancing natural systems. The firm is also ISO 9001:2015 certified, reflecting their dedication to quality and efficiency in their operations. Sheladia's multidisciplinary team includes professionals skilled in various aspects of engineering, ensuring comprehensive solutions for their clients' needs.


24. Ecotone, Inc.

  • Website: ecotoneinc.com
  • Ownership type: Private Equity
  • Headquarters: Forest Hill, Maryland, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Latest funding: July 2021
  • Founded year: 1998
  • Headcount: 51-200
  • LinkedIn: ecotone-inc-

Ecotone, Inc., founded in 1998 and based in Forest Hill, Maryland, is an ecological restoration company dedicated to improving the environment through various specialized services. The firm focuses on stream restoration, wetland creation, stormwater management, and reforestation, among other ecological initiatives. Ecotone serves a range of clients, including government agencies, private landowners, and organizations committed to environmental management. Over the years, the company has built a reputation for delivering quality outcomes and pioneering innovative approaches in ecological restoration. Their commitment to sustainability is evident in their projects and community involvement, as they strive to create a harmonious balance between nature and human activity. Ecotone also operates a native nursery, providing essential resources for their restoration efforts. The company has received multiple awards for its contributions to the field, highlighting its impact and recognition within the industry.



Environmental Engineering Insights: Key Companies in Maryland


CompanyHeadquarterSizeFoundedOwnership
KciSparks, Maryland, United States (USA)1001-50001955Private
Apex Companies, LLCRockville, Maryland, United States (USA)1001-50001988Venture Capital
EA Engineering, Science, and Technology, Inc., PBCCockeysville, Maryland, United States (USA)501-10001973Private
Straughan Environmental, Inc.Columbia, Maryland, United States (USA)51-2001995Private
AMT EngineeringRockville, Maryland, United States (USA)501-10001955Corporate
BiohabitatsBaltimore, Maryland, United States (USA)51-2001982Private
Whitman, Requardt and Associates, LLPBaltimore, Maryland, United States (USA)501-10001915Private
CCG, A Morrison Hershfield CompanyBaltimore, Maryland, United States (USA)11-501992Private
Environ-Civil Engineering LtdColumbia, Maryland, United States (USA)11-501992Private
NMP Engineering Consultants, Inc.Cockeysville, Maryland, United States (USA)51-2002002Private
Chesapeake Environmental Management, Inc.Bel Air, Maryland, United States (USA)51-2001993Private
SuYash Consulting, LLC.Columbia, Maryland, United States (USA)11-502015Private
SolteszRockville, Maryland, United States (USA)51-2001980Private
Geo-Technology Associates, Inc. (GTA)Abingdon, Maryland, United States (USA)501-10001985Private
McCrone | HartwellAnnapolis, Maryland, United States (USA)11-501937Private
LRS Federal LLCSeverna Park, Maryland, United States (USA)51-2002006Private
Potomac-Hudson Engineering, Inc.Gaithersburg, Maryland, United States (USA)51-2001988Private
Rk&kBaltimore, Maryland, United States (USA)1001-50001923Private
BayLand Consultants & Designers, Inc.Hanover, Maryland, United States (USA)11-501995Private
Daft-McCune-Walker, Inc.Towson, Maryland, United States (USA)11-501970Private
CV, Inc.Gaithersburg, Maryland, United States (USA)11-502009Private
Environmental Research Group, LLC (ERG)Baltimore, Maryland, United States (USA)51-2002000Private
Sheladia Associates, Inc.Rockville, Maryland, United States (USA)201-5001974Private
Ecotone, Inc.Forest Hill, Maryland, United States (USA)51-2001998Private Equity


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