Company lists · Data refreshed September 2026

Top 25 Engineering consultancies based in Irvine, United States

Name: Engineering consultancies based in Irvine, United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 24, 2026 107 companies tracked

RevenueBase identified 107 company matches for engineering consultancies associated with Irvine, United States as of September 2026 and tracks 5,776 professional contacts across them, including 2,863 with verified work emails. Across the United States, Houston is the largest hub for this category (622 companies); Irvine has 107.

This list covers company matches for engineering consultancies associated with Irvine, United States, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed September 24, 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 RevenueBase SmartSearch · Exact Recorded Sep 24, 2026 How this list was built

107Companies

5,776Contacts tracked

2,863Verified emails

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The 25 largest engineering consultancies based in Irvine, United States

Ranked by team size

Top 25 of 107 company matches for engineering consultancies based in Irvine, United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 24, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#	Company	RevenueBase SmartSearch	Headquarters	Employees	Contacts
1	Salas O'brien	Exact match	Irvine, CA, United StatesHQ recorded Sep 24, 2026	1,001-5,000	1,843 contacts →
	Exact match “Salas O’Brien is an employee-owned engineering and technical services firm focused on advancing the human experience through the built environment.” Recorded in the RevenueBase company graph · Sep 24, 2026 · View company records in RevenueBase
2	Shimmick Corporation	Exact match	Irvine, CA, United StatesHQ recorded Sep 24, 2026	1,001-5,000	760 contacts →
	Exact match “At Shimmick (NASDAQ: SHIM), we’re shaping the future of sustainable infrastructure through innovative solutions that advance communities and protect our environment.” Recorded in the RevenueBase company graph · Sep 24, 2026 · View company records in RevenueBase
3	Arb, INC	Exact match	Irvine, CA, United StatesHQ recorded Sep 24, 2026	1,001-5,000	528 contacts →
	Exact match “ARB Inc.” Recorded in the RevenueBase company graph · Sep 24, 2026 · View company records in RevenueBase
4	LSA	Exact match	Irvine, CA, United StatesHQ recorded Sep 24, 2026	201-500	332 contacts →
	Exact match “LSA is a diversified environmental, transportation, and community planning firm that evolved from a small consulting firm.” Recorded in the RevenueBase company graph · Sep 24, 2026 · View company records in RevenueBase
5	Interwest Consulting Group	Exact match	Irvine, CA, United StatesHQ recorded Sep 24, 2026	201-500	221 contacts →
	Exact match “Interwest specializes in providing professional and consulting services to public agencies across California, Nevada, Colorado, and beyond.” Recorded in the RevenueBase company graph · Sep 24, 2026 · View company records in RevenueBase
6	Fuscoe Engineering, INC	Exact match	Irvine, CA, United StatesHQ recorded Sep 24, 2026	201-500	216 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Sep 24, 2026 · View company records in RevenueBase
7	IDS Group, INC	Exact match	Irvine, CA, United StatesHQ recorded Sep 24, 2026	51-200	205 contacts →
	Exact match “IDS is an award-winning engineering and architectural firm offering multidisciplinary consulting services through our staff of 90 professionals.” Recorded in the RevenueBase company graph · Sep 24, 2026 · View company records in RevenueBase
8	Leighton	Exact match	Irvine, CA, United StatesHQ recorded Sep 24, 2026	51-200	190 contacts →
	Exact match “Leighton, a Verdantas Company, provides environmental, geotechnical, materials testing, and special inspection services across the built community.” Recorded in the RevenueBase company graph · Sep 24, 2026 · View company records in RevenueBase
9	RBF Consulting, A Company Of Michael Baker International	Exact match	Irvine, CA, United StatesHQ recorded Sep 24, 2026	1,001-5,000	176 contacts →
	Exact match “RBF Consulting, a Company of Michael Baker International, LLC, is one of the Nation's leading civil engineering, design, planning, surveying and construction management firms…” Recorded in the RevenueBase company graph · Sep 24, 2026 · View company records in RevenueBase
10	Ocmi, Inc. O'connor Construction Management	Exact match	Irvine, CA, United StatesHQ recorded Sep 24, 2026	51-200	168 contacts →
	Exact match “Founded in 1982 by Colm O’Connor, OCMI leads the way in estimating, project controls, and construction management solutions.” Recorded in the RevenueBase company graph · Sep 24, 2026 · View company records in RevenueBase
11	Murow Development Consultants, A Crede Company	Exact match	Irvine, CA, United StatesHQ recorded Sep 24, 2026	51-200	91 contacts →
	Exact match “Murow DC provides superior services in land development improvements, with a high level of experience, expertise, and trust.” Recorded in the RevenueBase company graph · Sep 24, 2026 · View company records in RevenueBase
12	Group Delta Consultants, Inc., An Nv5 Company	Exact match	Irvine, CA, United StatesHQ recorded Sep 24, 2026	51-200	87 contacts →
	Exact match “Group Delta, an NV5 Company, is a geotechnical engineering firm which specializes in geotechnical investigations, forensic investigations, environmental services, material testing…” Recorded in the RevenueBase company graph · Sep 24, 2026 · View company records in RevenueBase
13	Ficcadenti Waggoner And Castle Structural Engineers FWC	Exact match	Irvine, CA, United StatesHQ recorded Sep 24, 2026	51-200	60 contacts →
	Exact match “FWC consists of over 70 professionals working to provide our clients with state-of-the-art structural engineering services.” Recorded in the RevenueBase company graph · Sep 24, 2026 · View company records in RevenueBase
14	VA Consulting, Inc., NOW Stantec	Exact match	Irvine, CA, United StatesHQ recorded Sep 24, 2026	51-200	60 contacts →
	Exact match “VA Consulting has joined Stantec, an architecture and engineering firm with more than creative team members across North America and the world.” Recorded in the RevenueBase company graph · Sep 24, 2026 · View company records in RevenueBase
15	AKM Consulting Engineers	Exact match	Irvine, CA, United StatesHQ recorded Sep 24, 2026	11-50	49 contacts →
	Exact match “Based in Irvine, California, AKM Consulting Engineers is a multidisciplinary firm providing expert engineering solutions to municipalities, public agencies, and state and federal…” Recorded in the RevenueBase company graph · Sep 24, 2026 · View company records in RevenueBase
16	Advantec Consulting Engineers, INC	Exact match	Irvine, CA, United StatesHQ recorded Sep 24, 2026	51-200	48 contacts →
	Exact match “At ADVANTEC Consulting Engineers, we are driven by a shared commitment to shaping smarter, safer, and more connected communities.” Recorded in the RevenueBase company graph · Sep 24, 2026 · View company records in RevenueBase
17	Hummingbird Teksystems, INC	Exact match	Irvine, CA, United StatesHQ recorded Sep 24, 2026	51-200	39 contacts →
	Exact match “Overview: Hummingbird TekSystem, Inc.” Recorded in the RevenueBase company graph · Sep 24, 2026 · View company records in RevenueBase
18	Linscott, LAW & Greenspan, Engineers	Exact match	Irvine, CA, United StatesHQ recorded Sep 24, 2026	51-200	37 contacts →
	Exact match “Linscott, Law & Greenspan, Engineers (LLG) provides transportation planning, traffic engineering and parking consultation services.” Recorded in the RevenueBase company graph · Sep 24, 2026 · View company records in RevenueBase
19	C&v Consulting, INC	Exact match	Irvine, CA, United StatesHQ recorded Sep 24, 2026	11-50	37 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Sep 24, 2026 · View company records in RevenueBase
20	Hummingbird Aero LLC	Exact match	Irvine, CA, United StatesHQ recorded Sep 24, 2026	11-50	36 contacts →
	Exact match “Hummingbird Aero LLC is a premier global engineering consulting and services provider focused in aircraft flight controls, actuation, hydraulic systems, avionics and software.” Recorded in the RevenueBase company graph · Sep 24, 2026 · View company records in RevenueBase
21	National Engineering & Consulting, INC	Exact match	Irvine, CA, United StatesHQ recorded Sep 24, 2026	51-200	20 contacts →
	Exact match “National Engineering and Consulting, Inc.” Recorded in the RevenueBase company graph · Sep 24, 2026 · View company records in RevenueBase
22	Moote Companies LLC	Exact match	Irvine, CA, United StatesHQ recorded Sep 24, 2026	11-50	18 contacts →
	Exact match “Moote Companies was established from the foundations of The Moote Group which was started in 1974.” Recorded in the RevenueBase company graph · Sep 24, 2026 · View company records in RevenueBase
23	SGE Consulting Engineers	Exact match	Irvine, CA, United StatesHQ recorded Sep 24, 2026	11-50	18 contacts →
	Exact match “Established in 1992, S.” Recorded in the RevenueBase company graph · Sep 24, 2026 · View company records in RevenueBase
24	Lean Technology Corporation	Exact match	Irvine, CA, United StatesHQ recorded Sep 24, 2026	11-50	17 contacts →
	Exact match “Lean Technology Corporation (formerly Lean Photometrics) has over 20 years of experience in Engineering Design, CM Electrical Inspection, Design-Bid-Build, and Airfield and…” Recorded in the RevenueBase company graph · Sep 24, 2026 · View company records in RevenueBase
25	Exyion, INC	Exact match	Irvine, CA, United StatesHQ recorded Sep 24, 2026	11-50	17 contacts →
	Exact match “Exyion prides itself in providing highly experienced Utility Industry Consultants with years of experience in many areas of the Utility Business.” Recorded in the RevenueBase company graph · Sep 24, 2026 · View company records in RevenueBase

RevenueBase SmartSearch

Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.

This list uses Exact for “engineering consultancies”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.

Showing 25 of 107 engineering consultancies based in Irvine, United States

See the full list, filter by size, metro and specialty, and access 2,863 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Engineering consultancies based in Irvine, United States at a glance

As of Sep 24, 2026

49.6%Verified-email coverage

54.0Average contacts per company

11-50Median size (employees)

Sep 24, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

1,001-5,000

Email recency for this list is measured across the whole United States list rather than for Irvine, so it is reported there. Company counts and contact totals on this page are exact for Irvine, over 107 companies.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

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: Company records associated with Irvine, United States whose business descriptions match “engineering consultancies” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch: Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview: The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality: RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
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 displayed company carries at least one verified work email. RevenueBase tracks 2,863 professional contacts with verified work emails across the full matched dataset. 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 24, 2026. Lists refresh periodically as the graph is re-checked.
Record context: Company records and descriptions can change. Check the company's website for its current services and locations.

Engineering consultancies by metro in the United States

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “engineering consultancies”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many engineering consultancies are there based in Irvine, United States?

RevenueBase identified 107 company matches for engineering consultancies associated with Irvine, United States as of September 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

Salas O'brien tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city in the United States has the most engineering consultancies?

Houston leads the United States with 622 company records, followed by New York (449) and Austin (208). Irvine has 107.

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 2,863 professional contacts with verified work emails tracked across these 107 companies; direct dials are available where recorded.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 24, 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.