Maryland's environmental consulting companies play a pivotal role in addressing ecological challenges, offering expertise in compliance, restoration, and resource management. These firms span various sizes, from small specialized teams to large corporations, working across sectors such as transportation, energy, and municipal services. With increasing regulatory pressures and growing awareness of climate change, the industry is expected to experience significant demand for innovative solutions. Companies are now focusing more on sustainable practices and technologies, reflecting a shift towards comprehensive environmental stewardship. As communities face more environmental challenges, these firms provide vital insight and support to ensure compliance and sustainability.


The companies listed here reflect a broad spectrum of expertise and size, with headquarters located mainly in Maryland's urban centers. Ranging from established firms like EA Engineering, founded in 1973, to newer players like KLT Group, established in 2020, these companies specialize in services such as environmental assessments, ecological restoration, and climate advisory strategies. Most operate with a workforce numbering from a few dozen to several thousand employees, underscoring the varying scales of their operations. Collectively, they illustrate Maryland's commitment to sustainable development through regulatory guidance and environmental solutions.


Read on to explore the top environmental consulting companies in Maryland.


Top 20 Environmental Consulting Companies in Maryland


1. 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, based in Rockville, Maryland, is a consulting and engineering firm that specializes in environmental solutions, water management, and infrastructure services. Established in 1988, Apex has built a robust portfolio of services that includes environmental assessments, stormwater management, and compliance assurance. The firm caters to a wide array of sectors, such as energy, healthcare, and transportation, providing expert guidance on regulatory compliance and project management. Apex is committed to sustainability and actively engages in community involvement, reflecting its dedication to creating a safe and equitable future. With a workforce of approximately 1,349 employees, Apex continues to expand its capabilities through strategic acquisitions, enhancing its expertise and service offerings in the environmental consulting industry.


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


EA Engineering, Science, and Technology, Inc., PBC, based in Cockeysville, Maryland, is an environmental consulting and engineering services firm established in 1973. The company specializes in a variety of services aimed at addressing complex environmental challenges. Their offerings include contaminated site assessment and remediation, climate change adaptation strategies, and natural resource management. EA serves a wide array of clients, including federal, state, municipal, and private sector entities. As a public benefit corporation, EA emphasizes sustainability and community engagement, striving to improve environmental quality through their projects. The firm is also recognized for its technical expertise and responsive service, which has earned it a solid reputation in the industry. With approximately 825 employees, EA is well-equipped to handle multifaceted projects that require an integrated approach to environmental issues.


3. 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 is an ecological consulting firm based in Baltimore, Maryland, founded in 1982. With a team of approximately 86 employees, the company specializes in ecological restoration, conservation planning, and integrated water strategies. They work with municipalities, educational institutions, and non-profit organizations to tackle environmental challenges such as habitat degradation and climate change. Biohabitats offers a wide array of services, including river and stream restoration, wetland restoration, and climate change adaptation strategies. Their approach combines sound scientific principles with community engagement, ensuring that their projects are both effective and sustainable. The company also provides design-build services, allowing them to manage projects from conception through construction. Their commitment to ecological stewardship is evident in their mission to restore ecosystems and inspire sustainable practices across various communities.


4. Straughan Environmental, Inc.


Straughan Environmental, Inc., based in Columbia, Maryland, is an environmental consulting and engineering firm that has been operational since 1995. With a workforce of approximately 93 employees, the company specializes in a broad spectrum of services, including environmental program management, construction management, and sustainable infrastructure solutions. Straughan serves a mix of government and commercial clients, focusing on innovative strategies to tackle environmental challenges. Their expertise spans multiple sectors, including transportation, energy, and water/wastewater management. The firm has a notable track record of successful projects, demonstrating their ability to navigate complex regulatory environments and deliver effective solutions. As a Woman-Owned Small Business (WOSB), Straughan emphasizes its commitment to sustainability and community engagement, positioning itself as a proactive player in the environmental consulting industry.


5. 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 a wide array of services, including construction management, environmental engineering, and technology solutions. KCI serves a variety of clients, from government agencies to private sector companies, with a strong emphasis on infrastructure development and sustainability. Their environmental engineering and science services cover a broad spectrum, addressing issues such as hazardous waste management, water resources, and ecological restoration. KCI is dedicated to integrating sustainable practices into their projects, ensuring compliance with environmental regulations while enhancing public safety. Their commitment to environmental stewardship is reflected in their innovative solutions that aim to protect and preserve natural habitats. KCI operates across multiple industries, demonstrating their adaptability and expertise in tackling complex environmental challenges.


6. EcoLogix Group, Inc.

  • Website: ecologixgroup.com
  • Ownership type: Private
  • Headquarters: Parkton, Maryland, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Founded year: 2001
  • Headcount: 11-50
  • LinkedIn: ecologix-group

EcoLogix Group, Inc. is an environmental consulting firm based in Parkton, Maryland, established in 2001. With a team of 28 professionals, the company specializes in providing strategic support to clients facing complex environmental challenges. Their services include stakeholder engagement, public policy analysis, regulatory compliance, and organizational support. EcoLogix Group has a strong emphasis on building relationships with communities that have historically been overlooked, ensuring that all voices are heard in the decision-making process. They have worked extensively with government agencies, project developers, and nonprofits, helping these entities navigate the intricacies of environmental regulations and community concerns. Their expertise in environmental justice and compliance has positioned them as a trusted advisor in the field, particularly as environmental policies evolve. EcoLogix Group's commitment to enhancing project outcomes through effective communication and collaboration underscores their relevance in the environmental consulting industry.


7. 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, established in 2000. The company specializes in providing environmental services and project support primarily to military and government agencies. ERG focuses on areas such as environmental planning, compliance, and conservation, leveraging its expertise to enhance operational missions and ensure adherence to regulations. The firm is recognized as a service-disabled veteran-owned (SDVO) and economically disadvantaged woman-owned (EDWO) small business, which positions it uniquely within the industry. ERG has a strong commitment to sustainability, operating from a solar-powered headquarters and implementing eco-friendly practices in its operations. The company has also expanded its service offerings through the acquisition of AmaTerra Environmental, further enhancing its capabilities in conservation services. With a dedicated team of professionals, ERG aims to provide high-quality environmental stewardship and support to its clients.


8. 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 strong focus on providing comprehensive services related to environmental analysis, compliance, and management. Founded in 1988, PHE has developed a solid reputation over its 30+ years in the industry, catering to both federal and private sector clients. The firm is known for its technical expertise in areas such as the National Environmental Protection Act (NEPA), regulatory compliance, environmental management systems, and site characterization. PHE's team of engineers, scientists, and planners work on complex projects that address critical environmental, climate change, and energy challenges. Their commitment to quality and responsiveness has earned them recognition as a reliable partner for clients navigating the intricacies of environmental regulations. PHE's services include environmental site assessments, compliance audits, and the development of sustainability programs, showcasing their active involvement in promoting environmental stewardship and regulatory adherence.


9. Blackwater


Blackwater Environmental Group, founded in 2009 and based in Cockeysville, Maryland, is an environmental consulting firm that specializes in environmental planning services primarily for governmental agencies. With a team boasting over 30 years of industry experience, Blackwater focuses on helping clients navigate the complexities of environmental regulations, particularly in the transportation sector. Their services include NEPA compliance, environmental impact analysis, public engagement, and technical studies, all aimed at ensuring projects meet local, state, and federal regulatory requirements. The firm is also committed to promoting environmental justice and equity, recognizing the importance of these issues in transportation and community planning. As a certified woman-owned minority business, Blackwater not only provides expert consulting but also actively participates in community service and volunteerism, reflecting their dedication to making a positive impact beyond their client work. They operate primarily in the Mid-Atlantic region and have established a reputation for delivering tailored solutions to challenging environmental projects.


10. Coho, an ERM Group company

  • Website: cohoclimate.com
  • Ownership type: Corporate
  • Headquarters: Bethesda, Maryland, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Latest funding: February 2023
  • Founded year: 2010
  • Headcount: 51-200
  • LinkedIn: cohoclimate

Coho, an ERM Group company, is a consulting firm based in Bethesda, Maryland, specializing in climate advisory services. Established in 2010, Coho Climate Advisors assists large organizations in navigating the complexities of sustainability, particularly in areas related to climate change, clean energy, and water management. The firm has worked with over 80 large organizations across various sectors, including manufacturers, governments, and educational institutions. Coho has helped clients contract for more than seven million megawatt hours of clean energy annually, enough to power over 650,000 homes. Their services include comprehensive assessments, strategy development, and implementation support, ensuring that clients can effectively meet their sustainability commitments. Coho's focus on tailored, objective advice and change management positions them as a valuable partner for organizations aiming to achieve ambitious climate goals.


11. Coastal Resources, Inc.

  • Website: coastal-resources.net
  • Ownership type: Private
  • Headquarters: Annapolis, Maryland, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Founded year: 1980
  • Headcount: 11-50
  • LinkedIn: coastal-resources-inc.

Coastal Resources, Inc. is an environmental consulting firm based in Annapolis, Maryland, founded in 1980. With a team of experienced professionals, including environmental scientists, hydrologists, and wildlife biologists, the company specializes in natural resource management and ecological assessments. Their services cover a wide spectrum, from biomonitoring and water quality analysis to environmental planning and NEPA documentation. Coastal Resources, Inc. has worked extensively with county and local governments, federal agencies, and private sector clients, helping them meet regulatory requirements and implement sustainable practices. Their expertise in sensitive species surveys, wetland delineation, and stream restoration reflects their commitment to environmental protection and resource management. The firm operates primarily in the Mid-Atlantic region, providing tailored solutions to address the unique environmental challenges faced by their clients.


12. Aarcher Consulting

  • Website: aarcherconsulting.com
  • Ownership type: Private
  • Headquarters: Annapolis, Maryland, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Founded year: 1997
  • Headcount: 11-50
  • LinkedIn: aarcherconsulting

Aarcher Consulting, based in Annapolis, Maryland, is an environmental consulting firm that has been operational since 1997. With a team of 23 employees, the company specializes in compliance and risk management services. Their offerings include environmental audits, safety plans, and sustainability initiatives tailored to meet the needs of clients across various industries such as manufacturing, mining, and telecommunications. Aarcher Consulting has a strong focus on helping organizations comply with environmental regulations and enhance their operational practices. They have conducted over 750 successful environmental compliance audits, showcasing their expertise in the field. The firm also provides support for drinking water systems, NEPA analysis, and due diligence for property transactions, further solidifying their role in the environmental consulting sector. Aarcher Consulting's commitment to environmental management and regulatory compliance positions them as a significant player in the industry.


13. KLT Group, LLC

  • Website: kltgroup.com
  • Ownership type: Private
  • Headquarters: Baltimore, Maryland, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Founded year: 2020
  • Headcount: 1-10
  • LinkedIn: klt-group

KLT Group, LLC is a woman-owned environmental consulting firm based in Baltimore, Maryland, established in 2020. The company specializes in sustainability, emergency management, and GIS services, catering primarily to government agencies and organizations in the transportation, energy, and construction sectors. KLT Group is recognized for its expertise in navigating environmental regulations and implementing effective management strategies. Their mission emphasizes the importance of innovative process improvements and policy development to enhance project outcomes. Notable projects include the Skipjack Wind Farm, aimed at supporting Maryland's clean energy goals, and the Baltimore-Washington SCMAGLEV, a high-speed transportation initiative. KLT Group has received accolades for its environmental practices, including the Maryland Department of Transportation Environmental Excellence Award in 2019. Their certifications as a woman-owned small business and various state and local recognitions further solidify their position in the environmental consulting field.


14. S.S. Papadopulos & Associates, Inc.

  • Website: sspa.com
  • Ownership type: Private
  • Headquarters: Rockville, Maryland, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Founded year: 1979
  • Headcount: 51-200
  • LinkedIn: s-s-papadopulos-%26-associates-inc-

S.S. Papadopulos & Associates, Inc. (SSP&A) is an environmental consulting firm based in Rockville, Maryland, specializing in groundwater and hydrogeology. Established in 1979, the company has developed a recognized practice in contaminant studies, environmental engineering, and remediation. Their services include water resource studies, contamination assessments, and remediation feasibility studies, among others. SSP&A has been involved in numerous high-profile projects, providing expert witness services and technical support in judicial and regulatory forums. The firm has also contributed to significant environmental programs, addressing complex issues related to groundwater and surface water interactions. With a team of experienced professionals, SSP&A continues to play a vital role in environmental management and compliance, serving clients across various sectors.


15. 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, specializing in geotechnical, environmental, and construction consulting services. Founded in 1985, GTA has grown to operate 24 offices across the Mid-Atlantic, Midwest, and Southeast regions of the United States. The firm employs over 500 professionals, including engineers, geologists, and scientists, who work collaboratively to provide practical solutions to complex engineering challenges. GTA's environmental consulting services include Phase I and II Environmental Site Assessments, subsurface evaluations, and hazardous materials management. Their approach emphasizes innovative strategies to reduce compliance costs and address environmental constraints early in project development. This focus on client needs and regulatory compliance positions GTA as a significant player in the environmental consulting industry.


16. Arc Environmental

  • Website: arcenvironmental.com
  • Ownership type: Private
  • Headquarters: Baltimore, Maryland, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Founded year: 1991
  • Headcount: 11-50
  • LinkedIn: arc-environmental

Arc Environmental, based in Baltimore, Maryland, is an environmental consulting and engineering firm that has been operational since 1991. The company specializes in environmental assessment, remediation, and compliance services, catering to a wide range of clients, including government agencies and private sector businesses. With a team of professionals that includes engineers, geologists, and health and safety experts, Arc Environmental has successfully managed numerous multi-million dollar projects across the United States. Their services cover critical areas such as decontamination, groundwater monitoring, and indoor air quality assessments. The firm is also recognized for its work in brownfields remediation, helping to revitalize contaminated properties for productive reuse. Arc Environmental's commitment to effective environmental management strategies positions them as a significant player in the industry, focused on enhancing asset value while addressing complex environmental challenges.


17. Boggs Environmental Consultants, Inc.


Boggs Environmental Consultants, Inc. is a private environmental consulting firm based in Middletown, Maryland, with an additional office in West Virginia. Established in 1990 by Mark A. Boggs, the company specializes in providing a wide array of services that include industrial hygiene, environmental health and safety audits, and compliance training. With a team of experienced professionals, Boggs Environmental focuses on helping clients meet environmental regulations and ensure workplace safety. Their clientele spans both government agencies and private sector businesses, reflecting their adaptability and expertise in various sectors. Over the years, the firm has built a reputation for delivering personalized and professional support, emphasizing the importance of regulatory compliance and exceeding client expectations. Their motto, "Scientific Rigor is the Standard Operating Procedure," underscores their commitment to quality and thoroughness in all projects. Boggs Environmental has been active in the industry for over three decades, demonstrating resilience and relevance in a constantly evolving field.


18. 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. is an ecological restoration firm based in Forest Hill, Maryland, founded in 1998. With a team of approximately 56 employees, the company specializes in a range of services aimed at restoring and enhancing natural ecosystems. Their expertise includes stream restoration, wetland creation, stormwater management, and reforestation. Ecotone works closely with government agencies, private landowners, and organizations dedicated to environmental management, helping them tackle ecological challenges effectively. The company has been recognized for its innovative approaches and quality outcomes, earning accolades from clients and industry partners alike. Ecotone also operates a native nursery, providing plants that are integral to their restoration projects. Their commitment to community engagement and education is evident through initiatives like BeaverCON, an international conference focused on leveraging the ecological benefits of beavers in landscape management.


19. CCG, A Morrison Hershfield Company


CCG, A Morrison Hershfield Company, based in Baltimore, Maryland, is a private engineering firm founded in 1992. It operates under the umbrella of Morrison Hershfield, which has a strong reputation in engineering and environmental services. The company focuses on providing innovative solutions in various sectors, including environmental services, infrastructure development, and sustainability. CCG's expertise includes climate change mitigation, environmental assessments, and solid waste management, among other services. They cater to both government and private sector clients, addressing complex engineering challenges while ensuring compliance with environmental regulations. Their commitment to sustainability is evident in their project work, which aims to create lasting positive impacts on communities and ecosystems. CCG is also 100% employee-owned, fostering a culture of accountability and investment in client success.


20. 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, primarily in Maryland and surrounding states. SuYash Consulting specializes in a range of services, including project management, structural inspections, and environmental permitting. They are particularly focused on water resources, offering solutions that help clients navigate complex regulatory requirements. The firm is committed to sustainability, aiming to improve water quality and protect natural habitats. Their projects often involve innovative approaches to stormwater management and erosion control, reflecting their dedication to environmental stewardship. SuYash Consulting is also recognized as a Minority Business Enterprise and holds various certifications, enhancing their credibility in the industry. They have successfully completed over 100 projects, demonstrating their active involvement in the environmental consulting sector.



Environmental Consulting Insights: Key Companies in Maryland


CompanyHeadquarterSizeFoundedOwnership
Apex Companies, LLCRockville, Maryland, United States (USA)1001-50001988Venture Capital
EA Engineering, Science, and Technology, Inc., PBCCockeysville, Maryland, United States (USA)501-10001973Private
BiohabitatsBaltimore, Maryland, United States (USA)51-2001982Private
Straughan Environmental, Inc.Columbia, Maryland, United States (USA)51-2001995Private
KciSparks, Maryland, United States (USA)1001-50001955Private
EcoLogix Group, Inc.Parkton, Maryland, United States (USA)11-502001Private
Environmental Research Group, LLC (ERG)Baltimore, Maryland, United States (USA)51-2002000Private
Potomac-Hudson Engineering, Inc.Gaithersburg, Maryland, United States (USA)51-2001988Private
BlackwaterCockeysville, Maryland, United States (USA)11-502009Private
Coho, an ERM Group companyBethesda, Maryland, United States (USA)51-2002010Corporate
Coastal Resources, Inc.Annapolis, Maryland, United States (USA)11-501980Private
Aarcher ConsultingAnnapolis, Maryland, United States (USA)11-501997Private
KLT Group, LLCBaltimore, Maryland, United States (USA)1-102020Private
S.S. Papadopulos & Associates, Inc.Rockville, Maryland, United States (USA)51-2001979Private
Geo-Technology Associates, Inc. (GTA)Abingdon, Maryland, United States (USA)501-10001985Private
Arc EnvironmentalBaltimore, Maryland, United States (USA)11-501991Private
Boggs Environmental Consultants, Inc.Frederick, Maryland, United States (USA)11-501990Private
Ecotone, Inc.Forest Hill, Maryland, United States (USA)51-2001998Private Equity
CCG, A Morrison Hershfield CompanyBaltimore, Maryland, United States (USA)11-501992Private
SuYash Consulting, LLC.Columbia, Maryland, United States (USA)11-502015Private


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