Company lists · Data refreshed September 2026

Top 21 Infrastructure consulting firms based in Columbia, United States

RevenueBase identified 47 infrastructure consulting firms headquartered in Columbia, United States as of September 2026 and tracks 3,104 professional contacts across them, including 1,632 with verified work emails. New York is the largest hub.

This list covers infrastructure consulting firms headquartered in Columbia, 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 HQ checked on every row Match evidence on every row Refreshed Sep 3, 2026 86% judged on-target in blind review
47Companies
3,104Contacts tracked
1,632Verified emails
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The 21 largest infrastructure consulting firms based in Columbia, United States

Ranked by team size
Top 21 of 47 infrastructure consulting firms based in Columbia, United States, ranked by team size, largest first. Data refreshed Sep 3, 2026. Evidence rates how directly each company's own description names infrastructure 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
EnergeticsPartial evidence
Columbia, MD, United StatesHQ checked Sep 3, 202651-200152

“Energetics is a full-service technical and management consulting company specializing in energy (specifically energy modernization, efficiency, and clean energy) and…”

Source: company website · checked Sep 3, 2026
2
Parrish And Partners, LLCIndirect evidence
Columbia, SC, United StatesHQ checked Sep 3, 202651-20056

“Parrish and Partners, LLC (P&P) is a full-service engineering firm specializing in aviation, highway, and bridge programs.”

Source: company website · checked Sep 3, 2026
3Columbia, SC, United StatesHQ checked Sep 3, 202611-5054

“Holt Consulting Company is a multi-discipline engineering firm that provides planning, design, and management services for transportation infrastructure.”

Source: company website · checked Sep 3, 2026
4
COX And Dinkins INCIndirect evidence
Columbia, SC, United StatesHQ checked Sep 3, 202651-20027

“Founded in 1953 by Isaac B.”

Source: company website · checked Sep 3, 2026
5
Dennis CorporationIndirect evidence
Columbia, SC, United StatesHQ checked Sep 3, 202651-20027

“Dennis Corporation is a South Carolina licensed engineering, surveying, and construction management firm specializing in a broad range of services.”

Source: company website · checked Sep 3, 2026
6
KK Engineering LLCIndirect evidence
Columbia, MD, United StatesHQ checked Sep 3, 20261-1025

“We have in-depth experience in HVAC, Electrical, and Plumbing; smoke management, and fire-protection systems design for institutional, commercial, and residential facilities.”

Source: company website · checked Sep 3, 2026
7
Dungan Engineering PAIndirect evidence
Columbia, MS, United StatesHQ checked Sep 3, 202611-5024

“At Dungan Engineering, our professional civil engineering services are built on more than 250 years of combined knowledge and experience.”

Source: company website · checked Sep 3, 2026
8
Daniel Consultants, INCIndirect evidence
Columbia, MD, United StatesHQ checked Sep 3, 202611-5022

“DCI is a full-service transportation engineering firm with the expertise to complete a multifaceted project from start to finish.”

Source: company website · checked Sep 3, 2026
9
Tora Consulting, LLCPartial evidence
Columbia, SC, United StatesHQ checked Sep 3, 202611-5015

“Tora Consulting is now part of ALL4.”

Source: company website · checked Sep 3, 2026
10
Columbia Engineering, INCPartial evidence
Columbia, MD, United StatesHQ checked Sep 3, 202611-5015

“Columbia Engineering, Inc, a structural consulting firm located in Columbia, Maryland, provides design and consulting services for new and existing structures, condition surveys…”

Source: company website · checked Sep 3, 2026
11
Anthony Management GroupPartial evidence
Columbia, MD, United StatesHQ checked Sep 3, 20261-109

“The Anthony Management Group LLC is SBA 8(a) Certified and a Service Disabled Veteran Owned Small Business that provides management consulting and related services in support of…”

Source: company website · checked Sep 3, 2026
12Columbia, SC, United StatesHQ checked Sep 3, 202651-2009

“AAC Utility Partners, an E Source company, is a utilities-specific, vendor-independent consulting firm providing services for CIS and other mission-critical systems.”

Source: company website · checked Sep 3, 2026
13
Hybrid Engineering, INCIndirect evidence
Columbia, SC, United StatesHQ checked Sep 3, 20261-105
Source: company website · checked Sep 3, 2026
14
Orion USIndirect evidence
Columbia, SC, United StatesHQ checked Sep 3, 202611-504

“Orion US Inc.”

Source: company website · checked Sep 3, 2026
15
Networking Concepts, INCPartial evidence
Columbia, MD, United StatesHQ checked Sep 3, 20261-104

“Networking Concepts provides IT consulting, design, implementation and support services.”

Source: company website · checked Sep 3, 2026
16Columbia, SC, United StatesHQ checked Sep 3, 20261-103

“Founder in 2020, DRay Group Consulting Specialist has over 30 years of experience.”

Source: company website · checked Sep 3, 2026
17Columbia, MD, United StatesHQ checked Sep 3, 202611-503

“Advancement Strategy Consulting is a consulting company with a purpose.”

Source: company website · checked Sep 3, 2026
18
SSEIndirect evidence
Columbia, United StatesHQ checked Sep 3, 20261-103

“Our Services Civil Engineering Master planning conceptual design Annexation, Rezoning, Preliminary-Plat to Final Plat Services First Look Prelim Proforma Layout/Analysis Proforma…”

Source: company website · checked Sep 3, 2026
19
The Darisami GroupPartial evidence
Columbia, MD, United StatesHQ checked Sep 3, 202611-502

“The Darisami Group is an independent consulting platform that provides strategic advisory and transaction execution services to public and private sector clients across Africa…”

Source: company website · checked Sep 3, 2026
20
Benson Engineering, LLCPartial evidence
Columbia, MO, United StatesHQ checked Sep 3, 20261-102

“Benson Engineering, LLC provides electrical engineering and consulting solutions to institutional, commercial, and industrial clients as well as electrical contractors.”

Source: company website · checked Sep 3, 2026
21
Envirodesign INCIndirect evidence
Columbia, MD, United StatesHQ checked Sep 3, 20261-102

“EnviroDesign, Inc.”

Source: company website · checked Sep 3, 2026

Showing 21 of 47 infrastructure consulting firms based in Columbia, United States

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Infrastructure consulting firms based in Columbia, United States at a glance

As of Sep 3, 2026
11-50Median size (employees)
New YorkLargest hub · 306 HQs
Contacts with mobile numbers
Sep 3, 2026Data refreshed

Companies by employee count

1-10
20
11-50
16
51-200
8
201-500
1
501-1,000
1
1,001-5,000
1

Email recency for this list is measured across the whole United States list rather than this city, so it is reported there. Company counts and contact totals on this page are exact for Columbia, over 47 companies.

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 infrastructure 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 Columbia, United States whose own description of what they do matches “infrastructure 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 infrastructure consulting firms, and records with no verified work email. Companies headquartered outside Columbia 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, 1,632 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.

Infrastructure consulting firms by metro in the United States

Frequently asked

How many infrastructure consulting firms are there based in Columbia, United States?

RevenueBase identified 47 infrastructure consulting firms headquartered in Columbia, 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?

Energetics, headquartered in Columbia, tops this list with the largest team on record.

Which city has the most infrastructure consulting firms?

New York leads with 306 headquartered companies, followed by Houston (293) and Washington (158).

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 1,632 verified decision-maker contacts tracked across these 47 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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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.