Company lists · Data refreshed October 2026

Top 25 Infrastructure design consultancies based in Los Angeles, United States

Name: Infrastructure design consultancies based in Los Angeles, United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Oct 1, 2026 96 companies tracked

RevenueBase identified 96 company matches for infrastructure design consultancies associated with Los Angeles, United States as of October 2026 and tracks 2,386 professional contacts across them, including 1,130 with verified work emails. Across the United States, Houston is the largest hub for this category (242 companies); Los Angeles has 96.

This list covers company matches for infrastructure design consultancies associated with Los Angeles, 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 October 1, 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 Oct 1, 2026 How this list was built

96Companies

2,386Contacts tracked

1,130Verified emails

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The 25 largest infrastructure design consultancies based in Los Angeles, United States

Ranked by team size

Top 25 of 96 company matches for infrastructure design consultancies based in Los Angeles, United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Oct 1, 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	Psomas	Exact match	Los Angeles, CA, United StatesHQ recorded Oct 1, 2026	501-1,000	748 contacts →
	Exact match “Our award-winning projects are produced through innovation, creativity, and technical expertise.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
2	Cordoba Corporation	Exact match	Los Angeles, CA, United StatesHQ recorded Oct 1, 2026	501-1,000	516 contacts →
	Exact match “CORDOBA CORPORATION is a California engineering, construction management, program management, and planning firm specializing in transportation, water, energy, education and…” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
3	John A. Martin & Associates, INC	Exact match	Los Angeles, CA, United StatesHQ recorded Oct 1, 2026	51-200	132 contacts →
	Exact match “Established in 1953, John A.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
4	Morgner Construction Management Corp	Exact match	Los Angeles, CA, United StatesHQ recorded Oct 1, 2026	51-200	60 contacts →
	Exact match “Professional Management Services Company specialized in Transit, Highway and Energy Industries.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
5	Brandow & Johnston	Exact match	Los Angeles, CA, United StatesHQ recorded Oct 1, 2026	11-50	53 contacts →
	Exact match “Our firm is proud to be identified among those who built the Los Angeles we see today.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
6	JGM	Exact match	Los Angeles, CA, United StatesHQ recorded Oct 1, 2026	51-200	47 contacts →
	Exact match “JGM has offered a comprehensive array of design and construction related services to public and private sector clients for over 40 years.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
7	Aecom Technology Corp	Exact match	Los Angeles, CA, United StatesHQ recorded Oct 1, 2026	11-50	43 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
8	V&a, INC	Exact match	Los Angeles, CA, United StatesHQ recorded Oct 1, 2026	11-50	26 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
9	Nous Engineering	Exact match	Los Angeles, CA, United StatesHQ recorded Oct 1, 2026	11-50	21 contacts →
	Exact match “Nous Engineering is an innovative Structural Engineering firm based in Los Angeles.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
10	The Alliance Group Consulting	Exact match	Los Angeles, CA, United StatesHQ recorded Oct 1, 2026	1-10	16 contacts →
	Exact match “The Alliance Group Consulting (TAGC) is a California based transportation engineering firm which is located in Los Angeles and is certified as a SBE/VSBE/DBE/MBE/DGS firm.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
11	BA INC	Exact match	Los Angeles, CA, United StatesHQ recorded Oct 1, 2026	11-50	15 contacts →
	Exact match “BA Inc.(DBE/MBE/SBE) has been in business for 11 years; established and incorporated in 2004 to provide professional engineering design services to public agencies for public…” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
12	Analysis & Solutions Consultants	Exact match	Los Angeles, CA, United StatesHQ recorded Oct 1, 2026	11-50	14 contacts →
	Exact match “Analysis & Solutions Consultants (ASC) plays a key role in the design and construction of many challenging projects.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
13	C2pm	Exact match	Los Angeles, CA, United StatesHQ recorded Oct 1, 2026	11-50	14 contacts →
	Exact match “C2PM stands at the forefront of the construction consulting landscape, offering a full spectrum of program management, construction management, and specialized engineering…” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
14	Capital Project Intelligence	Exact match	Los Angeles, CA, United StatesHQ recorded Oct 1, 2026	51-200	13 contacts →
	Exact match “CPI is a consulting and professional services firm specializing in AI-enhanced solutions for infrastructure and utility clients.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
15	Innodez	Exact match	Los Angeles, CA, United StatesHQ recorded Oct 1, 2026	11-50	13 contacts →
	Exact match “We are a design and engineering company with a passionate group of engineers that offers professional engineering design services for a range of clients in commercial and…” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
16	Melqart Inc. Structural Engineering	Exact match	Los Angeles, CA, United StatesHQ recorded Oct 1, 2026	11-50	11 contacts →
	Exact match “Melqart, Inc.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
17	D R Consultants & Designers, INC	Exact match	Los Angeles, CA, United StatesHQ recorded Oct 1, 2026	11-50	10 contacts →
	Exact match “DRC, a public works engineering firm, in business for 40 years, provides expert level Transportation; Water/Wastewater engineering and Construction Management services to repeat…” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
18	The Robert Group	Exact match	Los Angeles, United StatesHQ recorded Oct 1, 2026	1-10	10 contacts →
	Exact match “The Robert Group, based in Los Angeles and with a smaller but highly respected presence in San Francisco, is an established public affairs and strategic communications firm…” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
19	DK Engineer, Corp	Exact match	Los Angeles, CA, United StatesHQ recorded Oct 1, 2026	1-10	9 contacts →
	Exact match “DK Engineer, Corp (DKE) is a boutique civil engineering consulting firm that provides design and construction administration services for construction projects throughout Southern…” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
20	Peter T. Erdelyi & Assoc. Inc.	Exact match	Los Angeles, CA, United StatesHQ recorded Oct 1, 2026	11-50	9 contacts →
	Exact match “Whether you're upgrading an existing structure or building from the ground up, Peter T.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
21	EPD Consultants, INC	Exact match	Los Angeles, United StatesHQ recorded Oct 1, 2026	1-10	9 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
22	Legion Contractors, INC	Exact match	Los Angeles, CA, United StatesHQ recorded Oct 1, 2026	51-200	9 contacts →
	Exact match “As a trusted General Contractor specializing in Infrastructural Public Works, we partner with government agencies to deliver projects that connect communities, enhance safety, and…” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
23	Parthenon Corporation	Exact match	Los Angeles, CA, United StatesHQ recorded Oct 1, 2026	11-50	8 contacts →
	Exact match “Parthenon Corporation is a leading provider of consulting, engineering, and construction services worldwide.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
24	Roto Architects	Exact match	Los Angeles, CA, United StatesHQ recorded Oct 1, 2026	11-50	7 contacts →
	Exact match “RoTo has envisioned, designed, and built a wide range of project types of varying type, scope, and complexity, locally, nationally, and internationally.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
25	Greystone Engineering Group INC	Exact match	Los Angeles, CA, United StatesHQ recorded Oct 1, 2026	1-10	7 contacts →
	Exact match “Civil and Structural Consulting engineers.” Recorded in the RevenueBase company graph · Oct 1, 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 “infrastructure design 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 96 infrastructure design consultancies based in Los Angeles, United States

See the full list, filter by size, metro and specialty, and access 1,130 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Infrastructure design consultancies based in Los Angeles, United States at a glance

As of Oct 1, 2026

47.4%Verified-email coverage

24.9Average contacts per company

1-10Median size (employees)

Oct 1, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

Email recency for this list is measured across the whole United States list rather than for Los Angeles, so it is reported there. Company counts and contact totals on this page are exact for Los Angeles, over 96 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 Los Angeles, United States whose business descriptions match “infrastructure design 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 1,130 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 October 1, 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.

Infrastructure design 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 “infrastructure design consultancies”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many infrastructure design consultancies are there based in Los Angeles, United States?

RevenueBase identified 96 company matches for infrastructure design consultancies associated with Los Angeles, United States as of October 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?

Psomas 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 infrastructure design consultancies?

Houston leads the United States with 242 company records, followed by New York (233) and Chicago (126). Los Angeles has 96.

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 1,130 professional contacts with verified work emails tracked across these 96 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 October 1, 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.