Land surveying in Pennsylvania involves professionals who use precise techniques to measure and map land for various uses, such as construction, real estate development, and environmental planning. Companies in this sector provide an array of services, including boundary determination, topographic surveys, and site development planning. With advancements in technology like drones and GPS systems, the industry is evolving and enhancing efficiency. As demand for infrastructure and urban development rises, these firms are expected to play a key role in shaping Pennsylvania's landscape, ensuring compliance with regulations and meeting client needs for accuracy and speed.


The companies on this list reflect a range of sizes, from small firms with around 10 employees to larger firms employing over 200 professionals. They are headquartered throughout Pennsylvania, from cities like College Township to Pittsburgh. Established from 1969 to 2014, these private enterprises offer specializations such as land planning, construction stakeout, and environmental consulting. Each firm is focused on using modern technology to address the surveying needs of municipalities and private developers alike, making a notable impact in their respective service areas.


Read on to discover more about top land surveying companies in Pennsylvania.


Top 23 Land Surveying Companies in Pennsylvania


1. PennTerra Engineering, Inc

  • Website: pennterra.com
  • Ownership type: Private
  • Headquarters: College Township, Pennsylvania, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Founded year: 1976
  • Headcount: 11-50
  • LinkedIn: pennterra-engineering-inc

PennTerra Engineering, Inc. is a civil engineering firm based in College Township, Pennsylvania, established in 1976. The company specializes in land planning, surveying, and site engineering, catering primarily to developers and organizations involved in construction and infrastructure projects. With a team of professionals that includes engineers, surveyors, and landscape architects, PennTerra is dedicated to providing innovative solutions that meet client needs while adhering to regulatory requirements. Their surveying services cover a wide array of applications, from perimeter and topographic surveys to GPS and utility facility surveys. The firm prides itself on using advanced technology and equipment to deliver precise and efficient results. As a 100% employee-owned company, PennTerra fosters a collaborative work environment that emphasizes community involvement and support for local initiatives. Their extensive experience and commitment to quality make them a significant player in the land surveying industry.


2. Control Point Surveying

  • Website: cpshawaii.net
  • Ownership type: Private
  • Headquarters: Aliquippa, Pennsylvania, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Founded year: 1984
  • Headcount: 11-50
  • LinkedIn: control-point-surveying

Control Point Surveying, Inc. is a private surveying firm founded in May 1984, based in Aliquippa, Pennsylvania, with a strong operational focus in Hawaii and the Pacific Rim. The company specializes in a variety of surveying services, including topographic, hydrographic, and cadastral surveying. They cater to both government and private sector clients, demonstrating their versatility and expertise in the field. Control Point Surveying employs a team of licensed professional land surveyors, ensuring high-quality service delivery. Their portfolio includes significant projects across various sectors, such as community development, healthcare, and education, showcasing their ability to handle diverse surveying needs. The firm is recognized for its commitment to quality work and timely responses, which has helped them establish a solid reputation in the industry. They utilize advanced technology, including LiDAR and GPS systems, to enhance their surveying capabilities, further solidifying their position in the market.


3. Keystone Surveying & Mapping Inc


Keystone Surveying & Mapping Inc, based in McMurray, Pennsylvania, is a private company that specializes in surveying and mapping services. Established in 2011, the firm has grown to employ between 51 and 200 professionals, showcasing a solid workforce dedicated to delivering high-quality surveying solutions. Keystone offers a range of services, including oil and gas surveying, commercial and residential surveying, and land development. Their clientele primarily consists of businesses in the construction and oil and gas sectors, who depend on their expertise for precise and reliable surveying. The company has expanded its operations to several states, reflecting its capability to manage projects across different regions. Keystone is fully licensed and insured, emphasizing its commitment to safety and quality in all its endeavors. The firm has also recently opened a new office in Canfield, Ohio, further extending its reach and service capabilities.


4. Land Grant Surveyors

  • Website: landgrantsurveyors.com
  • Ownership type: Private
  • Headquarters: Columbia, Pennsylvania, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Founded year: 2008
  • Headcount: 11-50
  • LinkedIn: land-grant-surveyors

Land Grant Surveyors, LLC, based in Columbia, Pennsylvania, is a professional surveying firm that has been operational since 2008. The company specializes in a wide array of surveying services, including boundary surveys, aerial imaging, construction stakeout, and wetland delineation. With a team of three licensed surveyors and a total of 23 employees, they bring over 175 years of combined experience to the table. Their client base spans residential and commercial sectors across several states, ensuring they meet the needs of various projects. The firm prides itself on utilizing both traditional and modern technologies to deliver accurate and timely results. Notably, they have expanded their capabilities through the acquisition of Weber Surveyors in 2018, which doubled their survey field crews and broadened their client base. Land Grant Surveyors is also affiliated with ELA Group, Inc., enhancing their service offerings in land development and engineering.


5. Rodriguez

  • Website: rodriguez.biz
  • Ownership type: Private
  • Headquarters: Philadelphia, Pennsylvania, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Founded year: 2007
  • Headcount: 11-50
  • LinkedIn: rodriguez-consulting-llc

Rodriguez Consulting, LLC, founded in 2007 and based in Philadelphia, Pennsylvania, specializes in civil engineering and geospatial services. The firm is dedicated to enhancing infrastructure management through precise surveying and effective data management. Rodriguez offers a comprehensive range of services, including civil engineering, site design, construction inspection, and notably, land surveying. Their surveying services have been foundational since the company's inception, catering to various sectors such as land development, environmental projects, and utility infrastructure. The firm is recognized for its innovative use of technology, employing tools like robotic total stations, GPS receivers, and unmanned aerial systems to deliver accurate and efficient surveying solutions. Rodriguez has built a solid reputation in the Greater Philadelphia area, serving a mix of government and private clients, and is committed to community engagement through initiatives like Rodriguez University, which promotes career opportunities in infrastructure for underserved communities.


6. ESE Consultants

  • Website: eseconsultants.com
  • Ownership type: Private
  • Headquarters: Fort Washington, Pennsylvania, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Founded year: 1986
  • Headcount: 51-200
  • LinkedIn: ese-consultants

ESE Consultants, Inc. is a consulting firm based in Fort Washington, Pennsylvania, founded in 1986. As a wholly-owned subsidiary of Toll Brothers, Inc., ESE provides a comprehensive suite of professional services, including land planning, civil engineering, land surveying, and environmental consulting. The firm primarily supports Toll Brothers' residential, commercial, and urban development projects across the United States. ESE's history began with a single survey crew in Bucks County, Pennsylvania, and has since expanded significantly, now operating through a network of 20 regional offices. The company employs over 150 specialists, including professional engineers, planners, surveyors, and landscape architects, who work collaboratively to assist in site acquisition and project planning. Their surveying services include boundary surveys, topographic surveys, and construction stakeout services, utilizing advanced technology such as GPS and robotic equipment. ESE's close relationship with Toll Brothers allows them to leverage their expertise in land development, making them a key player in the industry.


7. David Miller/Associates, Inc.

  • Website: dmai.com
  • Ownership type: Private
  • Headquarters: Lancaster, Pennsylvania, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Founded year: 1984
  • Headcount: 11-50
  • LinkedIn: david-miller-associates-inc-

David Miller/Associates, Inc. (DM/A) is a professional services firm based in Lancaster, Pennsylvania, founded in 1984. The company specializes in civil engineering, landscape architecture, surveying, and planning, catering to a variety of clients, including private landowners and municipal governments. DM/A is staffed by a team of professionals skilled in multiple disciplines, allowing them to provide comprehensive services that address the needs of their clients. Their surveying services include property and topographic surveys, ALTA land title surveys, and GPS mapping, showcasing their commitment to utilizing modern technology and techniques. The firm is also involved in environmental assessments and land development projects, further solidifying their role in the industry. DM/A's mission emphasizes innovative and sustainable solutions, reflecting their dedication to quality and community engagement.


8. C2C Design Group

  • Website: c2cdg.com
  • Ownership type: Private
  • Headquarters: Wernersville, Pennsylvania, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Founded year: 2014
  • Headcount: 11-50
  • LinkedIn: c2c-design-group

C2C Design Group is a civil engineering and surveying firm based in Wernersville, Pennsylvania. Established in 2014, the company provides a wide array of services that include land surveying, site design, and municipal engineering. They serve a variety of clients, ranging from municipal entities to residential and commercial developers, primarily in Central and Eastern Pennsylvania. The firm is dedicated to assisting clients in overcoming development challenges and achieving successful project outcomes. C2C Design Group offers extensive surveying services, such as boundary and topographic surveys, ALTA/ACSM land title surveys, and construction stakeout services. Their team is equipped with modern technology to ensure efficient and economical data processing and plotting. The company was originally part of the Forino Company and became independent in 2017, which reflects its growth and commitment to the surveying and engineering sectors. Their focus on practical solutions and regulatory compliance further solidifies their role in the land surveying industry.


9. Sleighter Design

  • Website: sleighterdesign.com
  • Ownership type: Private
  • Headquarters: Lemont Furnace, Pennsylvania, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Founded year: 1995
  • Headcount: 11-50
  • LinkedIn: sleighter-engineering

Sleighter Design is a multidisciplinary engineering, architecture, and surveying firm based in Lemont Furnace, Pennsylvania. Founded in 1995, the company has built a solid reputation over the years, providing tailored solutions to a variety of clients, including redevelopment authorities, housing authorities, and private developers. With a team of approximately 24 professionals, Sleighter Design emphasizes collaboration and innovation in their projects. They offer a comprehensive suite of services, including civil and site engineering, GIS mapping, and a full range of surveying services. Their surveying capabilities include boundary surveys, subdivision and land development, and construction stakeout, all supported by advanced technology and a commitment to quality. The firm has successfully completed hundreds of projects, demonstrating their technical proficiency and dedication to client satisfaction. Sleighter Design continues to evolve, adapting to the needs of the industry while maintaining a focus on community impact and sustainable practices.


10. JHA Companies

  • Website: jhacompanies.com
  • Ownership type: Private
  • Headquarters: Montrose, Pennsylvania, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Founded year: 2008
  • Headcount: 51-200
  • LinkedIn: jhacompanies

JHA Companies, based in Montrose, Pennsylvania, is a private engineering and surveying firm founded in 2008. With a workforce of approximately 94 employees, the company specializes in a variety of services, including environmental assessments, GIS services, building design, and notably, land surveying. Their surveying services cover essential areas such as boundary surveys, ALTA surveys, and 3D scanning, catering to a clientele that includes municipalities, healthcare providers, and developers. JHA Companies operates with a mission to serve clients effectively while maintaining high standards of excellence. Their approach emphasizes collaboration and thoroughness, ensuring that projects meet regulatory requirements and optimize outcomes for their clients. The firm has established a reputation for professionalism and responsiveness, as evidenced by positive client feedback.


11. SAS Geospatial, LLC

  • Website: sasgeospatial.com
  • Ownership type: Private
  • Headquarters: Warrington, Pennsylvania, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Founded year: 2013
  • Headcount: 11-50
  • LinkedIn: sas-geospatial-llc

SAS Geospatial, LLC, based in Warrington, Pennsylvania, is a professional firm specializing in land surveying and geospatial services. Established in 2013, the company has built a reputation for providing high-quality services to both private and public sector clients across the greater Philadelphia, State College, and New Jersey areas. Their offerings include conventional land surveying, drone imagery, 3D laser scanning, and subsurface utility locating. SAS Geospatial emphasizes the importance of accurate data collection and delivery, which is crucial for enhancing project safety and minimizing delays. The firm has been recognized for its rapid growth, making it onto The Philadelphia100® list for three consecutive years, highlighting its entrepreneurial success. Furthermore, SAS is a certified Minority Business Enterprise (MBE) and Disadvantaged Business Enterprise (DBE), reflecting its commitment to diversity and inclusion within the industry.


12. Hanover Land Services, Inc.


Hanover Land Services, Inc. (HLS) is a consulting firm based in Hanover, Pennsylvania, specializing in civil engineering, land surveying, and environmental services. Founded in 1969, the company has over 50 years of experience in the industry, providing tailored solutions to municipalities, private clients, and agricultural stakeholders. HLS operates primarily in Pennsylvania and Maryland, with additional licenses in Delaware and Virginia, allowing them to serve a broader client base. Their team includes licensed engineers and surveyors, ensuring compliance with regulations and effective project execution. HLS has been recognized for its growth and community contributions, having been featured in the Central Penn Business Journal's Top 50 Fastest Growing Companies in 2020 and awarded the Small Business of the Year by the Hanover Area Chamber of Commerce in 2018. Their project portfolio includes residential developments, environmental assessments, and municipal planning, showcasing their expertise across various sectors.


13. InLand Design, LLC.

  • Website: inlanddesign.net
  • Ownership type: Private
  • Headquarters: West Chester, Pennsylvania, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Founded year: 2009
  • Headcount: 11-50
  • LinkedIn: inland-design

InLand Design, LLC. is a private engineering firm based in West Chester, Pennsylvania, founded in 2009. The company specializes in land development consulting, surveying, and landscape architecture, catering to a variety of clients including builders, developers, and homeowners. With a team of experienced professionals, InLand Design offers a comprehensive suite of services that includes land planning, surveying, and engineering solutions. Their expertise extends to navigating complex regulatory environments, ensuring that projects meet necessary compliance standards. The firm operates primarily in Pennsylvania and Delaware, providing tailored solutions that address the unique challenges of each project. InLand Design has not reported any funding, indicating a self-sustaining business model focused on delivering quality services without external financial backing.


14. Monaloh Basin Engineers

  • Website: mbe-eng.com
  • Ownership type: Private
  • Headquarters: Pittsburgh, Pennsylvania, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Founded year: 1980
  • Headcount: 51-200
  • LinkedIn: monaloh-basin-engineers

Monaloh Basin Engineers, based in Pittsburgh, Pennsylvania, is a private engineering firm founded in 1980. With a workforce of approximately 69 employees, the company specializes in surveying and construction services across various industries, including transportation, energy, and utilities. Monaloh provides critical services such as field surveying, utility coordination, and construction management, ensuring that projects meet regulatory standards and are executed with precision. Their expertise extends to land development, where they assist clients in navigating local and state regulations. Monaloh's commitment to quality is evident in their investment in advanced surveying technologies, including UAS (drone) services, which enhance their data collection capabilities. The firm has built a reputation for reliability and responsiveness, making them a trusted partner for both businesses and government agencies.


15. MDM Surveyors & Engineers, LLC

  • Website: mdmllc.com
  • Ownership type: Private
  • Headquarters: Warrendale, Pennsylvania, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Founded year: 1999
  • Headcount: 11-50
  • LinkedIn: mcilvried-didiano-%26-mox-llc

MDM Surveyors & Engineers, LLC, based in Warrendale, Pennsylvania, is a consulting firm that specializes in surveying, engineering, and architectural support services. Since its inception in 1999, the company has grown from a small operation to a well-established firm with approximately 25 employees. MDM serves a variety of clients, including homeowners, contractors, and businesses, providing essential services for construction and land development projects across multiple states. Their offerings include residential and commercial surveys, civil engineering, and architectural support, showcasing their capability to handle projects of varying scales. The firm is licensed in nine states, which allows them to operate in a broader market. MDM prides itself on delivering quality products and maintaining high professional standards, which is reflected in their mission to provide innovative solutions with integrity and teamwork. Their commitment to community involvement and support for local initiatives further underscores their role as a responsible corporate citizen in the industry.


16. Morris Knowles & Associates, Inc. (A Hammontree Company)


Morris Knowles & Associates, Inc. (A Hammontree Company) is a civil engineering and surveying firm based in Monroeville, Pennsylvania. Founded in 1916, the company has built a solid reputation over more than a century of service. They offer a comprehensive suite of services that includes energy development, environmental assessments, construction monitoring, and, notably, land surveying. Their surveying capabilities cover boundary surveys, topographic surveys, GIS, GPS, and FEMA map amendments, catering to a variety of clients including businesses and municipalities. The firm prides itself on its project management expertise and regulatory compliance, which are critical in navigating the complexities of land development. Morris Knowles has been recognized for its growth and innovation, being ranked among the fastest-growing engineering firms in the nation. Their commitment to investing in technology and training further enhances their service delivery in the surveying sector.


17. Susquehanna Civil Inc.

  • Website: sqcivil.com
  • Ownership type: Private
  • Headquarters: York, Pennsylvania, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Founded year: 2008
  • Headcount: 51-200
  • LinkedIn: susquehanna-civil-inc-

Susquehanna Civil Inc. is an engineering and environmental consulting firm based in York, Pennsylvania, founded in 2008. The company is privately owned and employs between 51 to 200 professionals. It specializes in transportation-related projects, offering a range of services that include land surveying, transportation design, and environmental assessments. Susquehanna Civil is particularly focused on public sector clients, such as government agencies, and aims to deliver sustainable and cost-effective solutions for infrastructure development. Their land surveying services have expanded significantly, incorporating advanced techniques like HD laser scanning and mobile scanning. The firm is committed to maintaining high standards of integrity, quality, care, and responsiveness in all its projects, which include significant infrastructure improvements across Pennsylvania.


18. Keystone Consultants, LLC

  • Website: keystoneconsultants.net
  • Ownership type: Corporate
  • Headquarters: Pittsburgh, Pennsylvania, United States (USA)
  • Employee distribution: United States (USA) 98%, Georgia 2%
  • Latest funding: February 2019
  • Founded year: 1991
  • Headcount: 51-200
  • LinkedIn: keystone-consultants-inc.

Keystone Consultants, LLC, based in Pittsburgh, Pennsylvania, is a consulting firm that specializes in civil engineering, surveying, and environmental services. Founded in 1991, the company has built a reputation for delivering essential services to the utility, energy, and public infrastructure sectors. With a workforce of approximately 93 employees, Keystone has developed a robust portfolio that includes property and boundary surveys, construction stakeout, and environmental permitting. They leverage cutting-edge technology, such as UAVs for aerial mapping and GIS for data management, to enhance the accuracy and efficiency of their services. Keystone's extensive experience and commitment to understanding client needs have positioned them as a reliable partner in project development and compliance. Their operational footprint spans across the United States, allowing them to serve clients effectively in various regions.


19. Harshman CE Group, LLC

  • Website: harshmanllc.com
  • Ownership type: Private
  • Headquarters: Washington, Pennsylvania, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Founded year: 2013
  • Headcount: 11-50
  • LinkedIn: harshmanllc

Harshman CE Group, LLC, based in Washington, Pennsylvania, is a civil engineering and surveying firm founded in 2013. The company specializes in a range of services that cater to both private businesses and municipal clients. Their expertise includes site design, environmental permitting, and municipal engineering. A significant aspect of their operations is land surveying, where they provide services such as boundary surveys, topographic mapping, and GIS mapping. The firm is staffed by a team of professionals, including licensed surveyors and engineers, who are dedicated to navigating regulatory requirements and ensuring technical project execution. Harshman CE Group has built a reputation for delivering quality services in the civil engineering and surveying sectors, making them a relevant player in the industry.


20. Nave Newell, Inc.

  • Website: navenewell.com
  • Ownership type: Family Owned
  • Headquarters: Wayne, Pennsylvania, United States (USA)
  • Founded year: 1992
  • Headcount: 11-50
  • LinkedIn: nave-newell-inc-

Nave Newell, Inc., founded in 1992 and based in Wayne, Pennsylvania, is a family-owned consulting firm that specializes in civil engineering, land planning, surveying, and landscape architecture. With a team of approximately 32 professionals, the company focuses on providing comprehensive services to real estate developers and property owners. They assist clients in navigating the complexities of land development projects, ensuring compliance with local regulations, and facilitating successful project execution. Their expertise includes conducting ALTA, boundary, topographic surveys, and construction stakeout, which are essential services in the land surveying industry. Nave Newell has built strong relationships with local municipalities, enhancing their ability to secure necessary approvals efficiently. Their portfolio includes a variety of projects across sectors such as education, healthcare, and residential development, showcasing their active involvement in the land development process.


21. Site Design Concepts, Inc.

  • Website: sitedc.com
  • Ownership type: Private
  • Headquarters: York, Pennsylvania, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Founded year: 1994
  • Headcount: 11-50
  • LinkedIn: site-design-concepts-inc-

Site Design Concepts, Inc. is a land development consulting firm based in York, Pennsylvania, established in 1994. The company specializes in a variety of professional services, including civil engineering, landscape architecture, land surveying, and environmental consulting. They cater to developers and municipalities, assisting them in navigating the complexities of land development projects and regulatory requirements. With a team of approximately 27 employees, Site Design Concepts emphasizes quality service and innovative design solutions. Their surveying services are comprehensive, utilizing advanced technology such as robotic total stations and GPS systems to ensure accuracy and efficiency. The firm has built a reputation in the Mid-Atlantic region for its expertise in land development, making it a significant player in the industry.


22. The Crossroads Group, LLC


The Crossroads Group, LLC, based in Hamburg, Pennsylvania, is a family-owned firm specializing in civil engineering and land surveying. Founded in 2006, the company has built a reputation for providing a wide array of services, including site surveys, construction design, and telecommunications support. They cater to a broad clientele, ranging from individual homeowners to large energy companies, demonstrating their ability to manage projects of varying scales and complexities. The firm is licensed to operate in several states, which allows them to extend their services beyond Pennsylvania into regions like Delaware, New York, and West Virginia. Their commitment to staying updated on regulatory standards and engineering methodologies positions them as a reliable partner for clients navigating the often-complex landscape of land development and surveying. The Crossroads Group also emphasizes community involvement, participating in local events and supporting environmental initiatives, which further enhances their standing in the industry.


23. Edward B. Walsh & Associates, Inc.


Edward B. Walsh & Associates, Inc. (EBWA) is a civil engineering and land surveying firm based in Exton, Pennsylvania. Founded in 1985, the company has built a solid reputation for providing a wide array of services that cater to builders, developers, property owners, and municipalities. Their expertise spans land development, municipal engineering, and environmental consulting, making them a versatile partner in project planning and execution. EBWA's team consists of professionals with an average of 30 years of industry experience, ensuring that clients receive knowledgeable guidance throughout their projects. The firm is registered in multiple states, including Pennsylvania, New Jersey, Delaware, and Maryland, and serves various counties in Pennsylvania. Their commitment to thoroughness and timely service in land surveying is evident in their offerings, which include construction layout, legal descriptions, and floodplain elevation certificates. EBWA has successfully managed projects across residential, commercial, and institutional sectors, demonstrating their capability to handle projects of varying scales and complexities.



Land Surveying Insights: Key Companies in Pennsylvania


CompanyHeadquarterSizeFoundedOwnership
PennTerra Engineering, IncCollege Township, Pennsylvania, United States (USA)11-501976Private
Control Point SurveyingAliquippa, Pennsylvania, United States (USA)11-501984Private
Keystone Surveying & Mapping IncMcmurray, Pennsylvania, United States (USA)51-2002011Private
Land Grant SurveyorsColumbia, Pennsylvania, United States (USA)11-502008Private
RodriguezPhiladelphia, Pennsylvania, United States (USA)11-502007Private
ESE ConsultantsFort Washington, Pennsylvania, United States (USA)51-2001986Private
David Miller/Associates, Inc.Lancaster, Pennsylvania, United States (USA)11-501984Private
C2C Design GroupWernersville, Pennsylvania, United States (USA)11-502014Private
Sleighter DesignLemont Furnace, Pennsylvania, United States (USA)11-501995Private
JHA CompaniesMontrose, Pennsylvania, United States (USA)51-2002008Private
SAS Geospatial, LLCWarrington, Pennsylvania, United States (USA)11-502013Private
Hanover Land Services, Inc.Hanover, Pennsylvania, United States (USA)11-501969Private
InLand Design, LLC.West Chester, Pennsylvania, United States (USA)11-502009Private
Monaloh Basin EngineersPittsburgh, Pennsylvania, United States (USA)51-2001980Private
MDM Surveyors & Engineers, LLCWarrendale, Pennsylvania, United States (USA)11-501999Private
Morris Knowles & Associates, Inc. (A Hammontree Company)Monroeville, Pennsylvania, United States (USA)51-2001916Private
Susquehanna Civil Inc.York, Pennsylvania, United States (USA)51-2002008Private
Keystone Consultants, LLCPittsburgh, Pennsylvania, United States (USA)51-2001991Corporate
Harshman CE Group, LLCWashington, Pennsylvania, United States (USA)11-502013Private
Nave Newell, Inc.Wayne, Pennsylvania, United States (USA)11-501992Family Owned
Site Design Concepts, Inc.York, Pennsylvania, United States (USA)11-501994Private
The Crossroads Group, LLCHamburg, Pennsylvania, United States (USA)11-502006Family Owned
Edward B. Walsh & Associates, Inc.Exton, Pennsylvania, United States (USA)11-501985Private


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