Company lists · Data refreshed September 2026

Top 25 Infrastructure engineering staffing companies based in San Diego, United States

Name: Infrastructure engineering staffing companies based in San Diego, United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 28, 2026 72 companies tracked

RevenueBase identified 72 infrastructure engineering staffing companies headquartered in San Diego, United States as of September 2026 and tracks 3,497 professional contacts across them, including 1,803 with verified work emails. Across the United States, Houston is the largest hub for this category (320 companies); San Diego has 72.

This list covers infrastructure engineering staffing companies headquartered in San Diego, 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, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 28, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, 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 RevenueBase Smart Search rating on every row Refreshed Sep 28, 2026 86% judged on-target in blind review

72Companies

3,497Contacts tracked

1,803Verified emails

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The 25 largest infrastructure engineering staffing companies based in San Diego, United States

Ranked by team size

Top 25 of 72 infrastructure engineering staffing companies based in San Diego, United States, ranked by team size, largest first. Data refreshed Sep 28, 2026. RevenueBase Smart Search rates how each company's information relates to infrastructure engineering staffing companies: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	Kleinfelder	Indirect evidence	San Diego, CA, United StatesHQ checked Sep 28, 2026	1,001-5,000	2,344 contacts →
	Indirect evidence “At Kleinfelder, we have been connecting great people to the best work since 1961.” Source: RevenueBase Database · checked Sep 28, 2026
2	Contractors And Builders	Partial evidence	San Diego, CA, United StatesHQ checked Sep 28, 2026	11-50	142 contacts →
	Partial evidence “Contractors & Builders is focused on developing comprehensive staffing solutions for the construction industry.” Source: RevenueBase Database · checked Sep 28, 2026
3	4liberty, INC	Partial evidence	San Diego, CA, United StatesHQ checked Sep 28, 2026	51-200	93 contacts →
	Partial evidence “4Liberty is a leading technical & professional services firm focused on energy & infrastructure.” Source: RevenueBase Database · checked Sep 28, 2026
4	Pride Resource Partners	Indirect evidence	San Diego, CA, United StatesHQ checked Sep 28, 2026	51-200	83 contacts →
	Indirect evidence “Pride Resource Partners LLC (Pride) is a high-performing, project management and construction management professional services firm.” Source: RevenueBase Database · checked Sep 28, 2026
5	C2 Group - SAN Diego	Strong evidence	San Diego, CA, United StatesHQ checked Sep 28, 2026	51-200	75 contacts →
	Strong evidence “C2 Group: Applied Strategy & Infrastructure Technology \| Consulting · Engineering · C2 Group is an applied strategy and infrastructure technology firm delivering strategic…” Source: RevenueBase Database · checked Sep 28, 2026
6	Coffman Specialties, INC	Indirect evidence	San Diego, CA, United StatesHQ checked Sep 28, 2026	201-500	71 contacts →
	Indirect evidence “Established in 1991, Coffman Specialties, Inc.(CSI) is a Woman Owned Business Enterprise specializing in the construction of large public and governmental projects.” Source: RevenueBase Database · checked Sep 28, 2026
7	Kineticom INC	Partial evidence	San Diego, CA, United StatesHQ checked Sep 28, 2026	201-500	67 contacts →
	Partial evidence “Kineticom is an established consulting & staffing firm in telecom, tower, and renewable energy.” Source: RevenueBase Database · checked Sep 28, 2026
8	Bwe, INC	Partial evidence	San Diego, CA, United StatesHQ checked Sep 28, 2026	11-50	66 contacts →
	Partial evidence “Since 1971, BWE has been providing Structural Engineering, Civil Engineering, and Land Surveying services.” Source: RevenueBase Database · checked Sep 28, 2026
9	Scst, LLC	Indirect evidence	San Diego, CA, United StatesHQ checked Sep 28, 2026	51-200	52 contacts →
	Indirect evidence “SCST,LLC is now Atlas.” Source: RevenueBase Database · checked Sep 28, 2026
10	Project Design Consultants, A Bowman Company	Indirect evidence	San Diego, CA, United StatesHQ checked Sep 28, 2026	51-200	52 contacts →
	Indirect evidence “As of July 18, 2022, Project Design Consultants has joined team Bowman.” Source: RevenueBase Database · checked Sep 28, 2026
11	Nasland Engineering	Partial evidence	San Diego, CA, United StatesHQ checked Sep 28, 2026	51-200	38 contacts →
	Partial evidence “Selecting the right engineering firm is significant, because engineering is the foundation of all that follows.” Source: RevenueBase Database · checked Sep 28, 2026
12	Tsac Engineering	Partial evidence	San Diego, CA, United StatesHQ checked Sep 28, 2026	51-200	29 contacts →
	Partial evidence “We are passionate about providing our clients with the best engineering and surveying services in the industry.” Source: RevenueBase Database · checked Sep 28, 2026
13	WHB Engineers	Strong evidence	San Diego, CA, United StatesHQ checked Sep 28, 2026	51-200	22 contacts →
	Strong evidence “WHB Engineers is a leading engineering and construction management firm working on our country’s most important infrastructure.” Source: RevenueBase Database · checked Sep 28, 2026
14	West Coast Civil, INC	Partial evidence	San Diego, CA, United StatesHQ checked Sep 28, 2026	11-50	21 contacts →
	Partial evidence “WEST COAST CIVIL (WCC) is an emerging disadvantaged civil engineering firm in Southern California.” Source: RevenueBase Database · checked Sep 28, 2026
15	Caltek Staffing	Strong evidence	San Diego, CA, United StatesHQ checked Sep 28, 2026	51-200	20 contacts →
	Strong evidence “Founded in 2002 by two career recruiters, CalTek Staffing is a premier manufacturing, technical, IT and engineering staffing and recruiting firm.” Source: RevenueBase Database · checked Sep 28, 2026
16	Sullaway Engineering, INC	Partial evidence	San Diego, CA, United StatesHQ checked Sep 28, 2026	11-50	16 contacts →
	Partial evidence “Sullaway Engineering is a full-service, national structural engineering firm specializing in commercial structures, sign engineering, large frame structures, LED structures…” Source: RevenueBase Database · checked Sep 28, 2026
17	PAL General Engineering	Partial evidence	San Diego, CA, United StatesHQ checked Sep 28, 2026	11-50	11 contacts →
	Partial evidence “PAL General Engineering is a construction company whose principal contracting business is in connection with fixed works requiring specialized engineering knowledge and skill…” Source: RevenueBase Database · checked Sep 28, 2026
18	Lovelace Engineering, INC	Partial evidence	San Diego, CA, United StatesHQ checked Sep 28, 2026	1-10	10 contacts →
	Partial evidence “Lovelace Engineering is a San Diego based structural engineering company committed to giving our clients the highest level of service and technical expertise.” Source: RevenueBase Database · checked Sep 28, 2026
19	Wiseman Rohy Structural Engineers	Partial evidence	San Diego, CA, United StatesHQ checked Sep 28, 2026	11-50	9 contacts →
	Partial evidence “Wiseman + Rohy is an engineering firm specializing in structural design and building analysis as well as BIM / 3-D structural modeling.” Source: RevenueBase Database · checked Sep 28, 2026
20	Blue Lake Civil	Partial evidence	San Diego, CA, United StatesHQ checked Sep 28, 2026	1-10	9 contacts →
	Partial evidence “Blue Lake Civil is a San Diego based engineering consulting firm founded by Maggie Witt and Tim Monroe.” Source: RevenueBase Database · checked Sep 28, 2026
21	Nova Engineering, INC	Partial evidence	San Diego, CA, United StatesHQ checked Sep 28, 2026	11-50	8 contacts →
	Partial evidence “NOVA Engineering provides civil engineering, survey, planning, and stormwater services.” Source: RevenueBase Database · checked Sep 28, 2026
22	RT Engineering & Associates INC Rtea	Partial evidence	San Diego, CA, United StatesHQ checked Sep 28, 2026	1-10	8 contacts →
	Partial evidence “RT ENGINEERING & ASSOCIATES, INC -(SBE/DBE/MBE/WBE/WOSB/SLBE/ELBE) In 2011, RT Engineering & Associates, Inc.(RTEA) was founded in the state of California as an S-Corporation by…” Source: RevenueBase Database · checked Sep 28, 2026
23	Spencer Gray	Indirect evidence	San Diego, CA, United StatesHQ checked Sep 28, 2026	51-200	7 contacts →
	Indirect evidence “Building the teams that power today's digital economy.” Source: RevenueBase Database · checked Sep 28, 2026
24	Tristaff Search	Indirect evidence	San Diego, CA, United StatesHQ checked Sep 28, 2026	1-10	6 contacts →
	Indirect evidence “TriStaff Search has now been in business in San Diego for 52 years and is still locally owned.” Source: RevenueBase Database · checked Sep 28, 2026
25	Talent180, LLC	Strong evidence	San Diego, CA, United StatesHQ checked Sep 28, 2026	1-10	6 contacts →
	Strong evidence “Since 2018, Talent180 has been the executive search and advisory firm of choice for civil engineering, land surveying, and infrastructure consulting firms seeking to strengthen…” Source: RevenueBase Database · checked Sep 28, 2026

RevenueBase Smart Search

RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: infrastructure engineering staffing companies. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.

Strong evidence: The company's own public description of its business names infrastructure engineering staffing companies.
Partial evidence: Its own public description names part of infrastructure engineering staffing companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name infrastructure engineering staffing companies. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.

RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.

Showing 25 of 72 infrastructure engineering staffing companies based in San Diego, United States

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Infrastructure engineering staffing companies based in San Diego, United States at a glance

As of Sep 28, 2026

51.6%Verified-email coverage

48.6Average contacts per company

11-50Median size (employees)

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

1,001-5,000

Email recency for this list is measured across the whole United States list rather than for San Diego, so it is reported there. Company counts and contact totals on this page are exact for San Diego, over 72 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 engineering staffing companies, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search 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 Smart Search, the natural-language company search available to every RevenueBase user.
What qualifies: Companies headquartered in San Diego, United States whose own description of what they do matches “infrastructure engineering staffing companies”. Matching reads each company's description, not its industry code or its name.
RevenueBase Smart Search: RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names infrastructure engineering staffing companies), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
What we exclude: Companies whose own description does not clearly place them among infrastructure engineering staffing companies, and records with no verified work email. Companies headquartered outside San Diego 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 its RevenueBase Smart Search 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, 1,803 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 28, 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 engineering staffing companies by metro in the United States

Frequently asked

What is RevenueBase Smart Search?

RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names infrastructure engineering staffing companies, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.

How many infrastructure engineering staffing companies are there based in San Diego, United States?

RevenueBase identified 72 infrastructure engineering staffing companies headquartered in San Diego, 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?

Kleinfelder, headquartered in San Diego, tops this list with the largest team on record.

Which city in the United States has the most infrastructure engineering staffing companies?

Houston leads the United States with 320 headquartered companies, followed by New York (192) and Austin (129). San Diego has 72.

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 1,803 verified decision-maker contacts tracked across these 72 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 28, 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 Smart Search, 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.