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Aultec Inc
“Great place to work for up and coming surveyors!”
Best Civil, Structural and Environmental Engineers in Gaithersburg, MD
24 companies listed · 10 in Gaithersburg · 2 open 24/7 · 4 open weekends · 17 rated 4.5+
Data verified October 18, 2026
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Helios Electric
- Electrical
- Company
- System
“We have been working with Priyan De Silva and the Helios staff on quite a few electrical projects, they are very professional, knowledgeable and have excellent hands on field experience.”
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Toossi & Associates Inc
“Provider of Professional Quality Construction Services since 1986.”
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TRC Engineering
“Whenever I have any projects that requires this kind of service, TRC is my first choice and over the years I have developed a great relationship with the staff here.”
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SNG Engineering Inc
“Job was completed in time and we got the permits.”
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Johnson Bernat Associates
“I needed My farm surveyed so I hired them and I cannot describe the experience that they provided.”
Listed for property owners in and around Gaithersburg, MD, these 24 companies do engineering work for properties. Listings show the disciplines each firm names on its own website, from structural to civil site work and environmental assessment, with ratings and quotes from public reviews.
Area overview: Gaithersburg, MD
10 of the 24 companies we list are based in Gaithersburg; the other 14 serve Gaithersburg from towns including Rockville (5 mi), Reston, VA (15 mi) and Ashburn, VA (16 mi). 21 of the companies on this page have a rating, from 4.3 to 5.0 across 288 reviews; 2 have 50 or more reviews and 17 are rated 4.5 or higher. When customers rate these companies on specific qualities, they most often praise professionalism (87%), responsiveness (61%) and quality (57%). 2 are open around the clock; 4 are open on Saturdays and 2 on Sundays. The services the companies on this page list most often on their websites are civil engineering (2), construction inspections (2) and land surveying (2). 3 show a license on their websites and 2 have a BBB rating of A or A+. 21 have ten or more years of experience, the longest 40 years. 2 offer emergency call-outs and 2 give free estimates. We have a website on file for all 24 of the companies on this page; 22 publish a contact page and 18 list a public email. We count these figures across the companies on this page; distances are straight-line, and hours and prices change, so confirm the details with the company before you book.
Do any of these firms say they are licensed?
3 of the 24 listings for Gaithersburg show a license on their websites. Registration belongs to an individual, so match the name on the seal to the person doing your work, and verify it with the state board rather than trusting a badge on a homepage.
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Comprehensive Structural Solutions
“Gooder.”
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Identification Technology Partners
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Subsurface & Tunnel Engineering Llc
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Watek Engineering Corporation
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S Q Consultants Inc
- Wall
- Drainage
- Contractors
“He knew immediately what needed to be done and with a good sense of humor took the opportunity to teach me about what to look for and various ways to repair the issues.”
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Soil & Structure Consulting
- Responsive
- Home
- Contractor
“The expert that I worked with was very observant and knowledgeable and his report was clear and provided some very helpful solutions to our soil seepage problem.”
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BIM VDC Consultant
“In my project which was a pretty good distance from his office when things are not going well he especially drove at different times to make sure the project deadline is met.”
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Apac Engineering Inc
- Ethical
- Renovation
- Knowledge
“Most importantly he has been easy to work with offering information and solutions for issues that may arise on projects he has worked on with us, and sometimes projects that he has not worked on.”
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Lourenco Consultants
“We have worked with the municipalities and 3rd party inspectors, but I have never had such an easy, pleasant and professional experience until I spoke with Sarah at Lourenco Consultants and worked with Tamika (the inspector).”
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Lucid Perspectives
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Pioneer Power Group
- Price
- Arc Flash
- Project
“Their team helped us get an arc flash study done in just 2 days!”
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Washington DC Permit Expeditors
- Phone
- Company
- Need
“I work for a basement waterproofing company and we needed to obtain a permit for underpinning in DC - we had several people working on this permit for OVER A YEAR before we wised up and hired Alexander Matthews and he ensured we received the permit i...”
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WFT Engineering
“Excellent Engineering firm, capable of all shapes and sizes of work.”
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Hanley Energy – USA Headquarter
“Christine is so helpful and the guys get the job done right the first time!”
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Greenway Engineering
“My mom works there and she's really smart.”
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Bit Systems
“Great site”
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Sheladia Associates
“Incredible international firm of engineers, architects, and project managers.”
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Millidec Engineers
“Fredy has always been professional and accommodating to our client's requests and time restraints.”
Why these companies made our list
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