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Company lists · Data refreshed September 2026

Top 25 Gis consulting firms based in the United States

Compiled by the RevenueBase Data Team Data refreshed Sep 3, 2026 1,067 companies tracked

RevenueBase identified 1,067 gis consulting firms headquartered in the United States as of September 2026 and tracks 45,253 professional contacts across them, including 22,506 with verified work emails and 19,634 with mobile numbers. Houston is the largest hub.

This list covers gis consulting firms headquartered in the United States, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, how directly it supports the match, and when it was last checked. Data refreshed September 3, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.

How to read this list Match evidence on every row Refreshed Sep 3, 2026 86% judged on-target in blind review
1,067Companies
45,253Contacts tracked
22,506Verified emails
19,634Mobile numbers
Unlock all 1,067 companies Free signup · no credit card · 500 free credits

The 25 largest gis consulting firms based in the United States

Ranked by team size
Top 25 of 1,067 gis consulting firms based in the United States, ranked by team size, largest first. Data refreshed Sep 3, 2026. Evidence rates how directly each company's own description names gis consulting firms: strong (names it), partial (names part of it), indirect (matched on its full profile rather than the summary shown). Click a count to unlock that company's people.
#CompanyHeadquartersEmployeesContacts
1
ESRIPartial evidence
Redlands, CA, United States5,001-10,0006,411

“Esri is the global market leader in geographic information system (GIS) software, location intelligence, and mapping.”

Source: company website · checked Sep 3, 2026
2
TerraconPartial evidence
Tustin, CA, United States5,001-10,0006,024

“Terracon is a 100 percent employee-owned consulting engineering firm providing quality services to clients.”

Source: company website · checked Sep 3, 2026
3
Bowman ConsultingIndirect evidence
Reston, VA, United States1,001-5,0001,645

“Headquartered in Reston, Virginia, Bowman is a national engineering services firm delivering infrastructure solutions to customers who own, develop and maintain the built…”

Source: company website · checked Sep 3, 2026
4
WoolpertIndirect evidence
Dayton, OH, United States1,001-5,0001,411

“Woolpert is a global leader in architecture, engineering, and geospatial (AEG) services, with over a century of experience driving innovation and delivering impact.”

Source: company website · checked Sep 3, 2026
5
SAMIndirect evidence
Merriam, KS, United States1,001-5,0001,281

“SAM has built a reputation as a trusted, knowledgeable, and innovative partner.”

Source: company website · checked Sep 3, 2026
6
Bge, INCIndirect evidence
Vero Beach, FL, United States1,001-5,0001,129

“Ranked No.”

Source: company website · checked Sep 3, 2026
7
Timmons GroupPartial evidence
Virginia Beach, VA, United States1,001-5,0001,064

“Timmons Group is an engineering & technology firm specializing in civil, environmental, GIS, and surveying services to clients across the US.”

Source: company website · checked Sep 3, 2026
8
MagnasoftIndirect evidence
Houston, TX, United States501-1,000806

“At Magnasoft, we have an unparalleled understanding of the power of geospatial data.”

Source: company website · checked Sep 3, 2026
9
Nv5 GeospatialPartial evidence
Suffolk, VA, United States1,001-5,000681

“NV5 provides engineering, technology, and consulting services for both public and private sectors.”

Source: company website · checked Sep 3, 2026
10
MSA Professional ServicesPartial evidence
Baraboo, WI, United States501-1,000598

“As a full-service consulting firm, MSA Professional Services (MSA) is all about creating communities that work.”

Source: company website · checked Sep 3, 2026
11
McadamsIndirect evidence
Winston-Salem, NC, United States501-1,000551

“McAdams is a full-service civil engineering, land planning, landscape architecture, transportation, and geomatics firm headquartered in Raleigh, North Carolina with offices across…”

Source: company website · checked Sep 3, 2026
12
Thomas & HuttonIndirect evidence
Covington, GA, United States501-1,000483

“Our story began in 1946 with the collaboration of former US Army Corps of Engineers Officers, Hue Thomas and Joe Hutton, in their start-up engineering firm in Savannah, GA.”

Source: company website · checked Sep 3, 2026
13
Geo-Technology Associates, Inc. GTAIndirect evidence
Laurel, MD, United States501-1,000457

“Geo-Technology Associates, Inc.(GTA) proudly celebrates more than 40 years of service, backed by a team of 600+ professionals-including geotechnical engineers, environmental…”

Source: company website · checked Sep 3, 2026
14
RICKIndirect evidence
San Diego, CA, United States201-500447

“RICK is an award-winning planning, design, and engineering firm.”

Source: company website · checked Sep 3, 2026
15
CyberswiftIndirect evidence
Worthington, OH, United States201-500368

“CyberSWIFT is an IT services company based in Columbus, Ohio.”

Source: company website · checked Sep 3, 2026
16
Topographic, COIndirect evidence
Seguin, TX, United States201-500337

“What began as a small company in the oilfields of Southern Oklahoma, today Topographic Land Surveyors stands as the industry leader in the fields of Surveying, Mapping…”

Source: company website · checked Sep 3, 2026
17
Geospatial SystemsIndirect evidence
Rochester, NY, United States1,001-5,000314

“ITT's Geospatial Systems Division is now part of Exelis Inc.”

Source: company website · checked Sep 3, 2026
18
Pixel SoftekIndirect evidence
Alpharetta, GA, United States201-500300

“PIXEL SOFTEK PVT.”

Source: company website · checked Sep 3, 2026
19
Encompass Energy Services, LLCPartial evidence
The Woodlands, TX, United States201-500293

“Encompass Energy Services, LLC is a Survey, Land/ROW, and GIS Firm.”

Source: company website · checked Sep 3, 2026
20
AvineonIndirect evidence
Mclean, VA, United States1,001-5,000286

“Avineon, Inc.”

Source: company website · checked Sep 3, 2026
21
LJB INCIndirect evidence
Riverside, CA, United States201-500278

“Founded in 1966, LJB is a national engineering firm who cares deeply about our clients, our team, and all stakeholders.”

Source: company website · checked Sep 3, 2026
22
RasmithPartial evidence
Irvine, CA, United States201-500247

“raSmith is a multi-disciplinary engineering consulting firm.”

Source: company website · checked Sep 3, 2026
23
EDR Environmental Design & ResearchIndirect evidence
Albany, NY, United States201-500245

“EDR is dedicated to creating and sustaining a better environment – for our clients, for our employees, and for our communities.”

Source: company website · checked Sep 3, 2026
24
Resource DataIndirect evidence
Boise, ID, United States201-500202

“Since 1986, Resource Data, Inc.”

Source: company website · checked Sep 3, 2026
25
LandpointIndirect evidence
Irving, TX, United States201-500201

“Headquartered in Fort Worth, Texas, Landpoint has nine office locations and is licensed to operate in 27 states.”

Source: company website · checked Sep 3, 2026

Showing 25 of 1,067 gis consulting firms based in the United States

See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 22,506 reachable decision-makers.

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Gis consulting firms based in the United States at a glance

As of Sep 3, 2026
11-50Median size (employees)
HoustonLargest hub · 25 HQs
19,634Contacts with mobile numbers
Sep 3, 2026Data refreshed

Companies by employee count

1-10
525
11-50
330
51-200
150
201-500
37
501-1,000
7
1,001-5,000
13
5,001-10,000
3

How this list was built

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among gis consulting firms, so some rows will be adjacent to the category rather than pure plays. The description and evidence rating on every row are there so you can check each match yourself.

Source
The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
What qualifies
Companies headquartered in the United States whose own description of what they do matches “gis consulting firms”. Matching reads each company's description, not its industry code or its name.
What we exclude
Companies whose own description does not clearly place them among gis consulting firms, and records with no verified work email. Companies headquartered outside United States are excluded even when they keep an office there.
Match quality
In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and an evidence rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
Ranking
Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
Verification
Every listed company carries at least one verified work email, 22,506 across the full list. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
Refresh
This page's figures were pulled from the company graph on September 3, 2026. Lists refresh periodically as the graph is re-checked.
Corrections
Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.

Gis consulting firms by metro

  • Gis consulting firms in Houston25

Frequently asked

How many gis consulting firms are there based in the United States?

RevenueBase identified 1,067 gis consulting firms headquartered in the United States as of September 2026, matched on each company's own description of what it does rather than its industry code.

What is the largest company on this list?

ESRI, headquartered in Redlands, tops this list with the largest team on record.

Which city has the most gis consulting firms?

Houston leads with 25 headquartered companies, followed by Austin (13) and San Diego (12).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 22,506 verified decision-maker contacts tracked across these 1,067 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 3, 2026.

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Related lists

Browse: Companies home · All United States lists · All Gis consulting firms lists · New lists

About this data

RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase SmartSearch, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.

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