Company lists · Data refreshed September 2026

Top 25 Design engineers staffing companies based in the United States

RevenueBase identified 768 design engineers staffing companies headquartered in the United States as of September 2026 and tracks 14,482 professional contacts across them, including 3,480 with verified work emails. Houston is the largest hub.

This list covers design engineers staffing companies 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, 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
768Companies
14,482Contacts tracked
3,480Verified emails
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The 25 largest design engineers staffing companies based in the United States

Ranked by team size
Top 25 of 768 design engineers staffing companies based in the United States, ranked by team size, largest first. Data refreshed Sep 28, 2026. RevenueBase Smart Search rates how each company's information relates to design engineers 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.
#CompanyRevenueBase Smart SearchHeadquartersEmployeesContacts
1Indirect evidenceOrange, CA, United StatesHQ checked Sep 28, 20265,001-10,000584 contacts →

Indirect evidence

“A Six Sigma Company ~61 years in the industry ~Nationwide 4 million+ candidate database ~Fortune Company ~Extensive E-Recruiting capabilities ~Reference and Employment check…”

Source: RevenueBase Database · checked Sep 28, 2026
2Partial evidenceBurlington, MA, United StatesHQ checked Sep 28, 2026201-500468 contacts →

Partial evidence

“For the last sixty years Entegee has provided Fortune 500 and other companies with highly qualified engineering and technical personnel.”

Source: RevenueBase Database · checked Sep 28, 2026
3Indirect evidenceEden Prairie, MN, United StatesHQ checked Sep 28, 2026201-500468 contacts →

Indirect evidence

“RFA serves 100's of clients ranging in size from Fortune 500 to entrepreneurial start-ups.”

Source: RevenueBase Database · checked Sep 28, 2026
4Indirect evidenceSouthfield, MI, United StatesHQ checked Sep 28, 20261,001-5,000447 contacts →

Indirect evidence

“Trusted for Talent.”

Source: RevenueBase Database · checked Sep 28, 2026
5Strong evidenceWestchester, IL, United StatesHQ checked Sep 28, 2026501-1,000402 contacts →

Strong evidence

“Sterling is an award-winning professional engineering consulting and technical staffing company.”

Source: RevenueBase Database · checked Sep 28, 2026
6Partial evidenceCleveland, OH, United StatesHQ checked Sep 28, 2026201-500360 contacts →

Partial evidence

“Established over a century ago in 1892, Osborn is proud to be one of the nation’s oldest engineering firms, continuing a tradition of excellence through outstanding quality in…”

Source: RevenueBase Database · checked Sep 28, 2026
7Strong evidenceAustin, TX, United StatesHQ checked Sep 28, 202651-200322 contacts →

Strong evidence

“Triple Crown delivers engineering, verification and design services that move the world forward, one precisely managed and expertly executed project at a time.”

Source: RevenueBase Database · checked Sep 28, 2026
8Indirect evidenceHouston, TX, United StatesHQ checked Sep 28, 2026201-500294 contacts →

Indirect evidence

“Helping AEC Firms Scale with On-Demand, US-Trained Architecture & MEP Professionals At Virtual Building Studio, we help AEC firms scale faster and deliver projects more…”

Source: RevenueBase Database · checked Sep 28, 2026
9Indirect evidenceTroy, MI, United StatesHQ checked Sep 28, 2026501-1,000288 contacts →

Indirect evidence

“At Talascend, opportunity isn’t just a word, it’s what drives everything we do.”

Source: RevenueBase Database · checked Sep 28, 2026
10Partial evidenceHouston, TX, United StatesHQ checked Sep 28, 202651-200262 contacts →

Partial evidence

“Progressive is a global staffing company connecting STEM talent with leading companies in the Power and Utilities, Renewable Energy, Oil and Gas, and Manufacturing industries.”

Source: RevenueBase Database · checked Sep 28, 2026
11Indirect evidenceHouston, TX, United StatesHQ checked Sep 28, 202651-200250 contacts →

Indirect evidence

“CTS - Complete Technical Services, Inc.”

Source: RevenueBase Database · checked Sep 28, 2026
12Partial evidenceColumbus, IN, United StatesHQ checked Sep 28, 2026201-500188 contacts →

Partial evidence

“LER TechForce, previously LHP Engineering Resources, was founded in 2001 and has boasted year-over-year growth ever since.”

Source: RevenueBase Database · checked Sep 28, 2026
13Strong evidenceNeedham, MA, United StatesHQ checked Sep 28, 2026n/a187 contacts →

Strong evidence

“Resource Options Inc.(ROI) provides custom staffing solutions to the design, construction, environmental, & emergency response industries.”

Source: RevenueBase Database · checked Sep 28, 2026
14Partial evidenceHolland, OH, United StatesHQ checked Sep 28, 2026501-1,000182 contacts →

Partial evidence

“ITS has been a leader in the engineering, technical and professional recruiting field since 1984.”

Source: RevenueBase Database · checked Sep 28, 2026
15Indirect evidenceSan Jose, CA, United StatesHQ checked Sep 28, 2026201-500169 contacts →

Indirect evidence

“Since Ryzen Solutions has become a trusted provider to Silicon Valley’s growing product development community.”

Source: RevenueBase Database · checked Sep 28, 2026
16Indirect evidenceIssaquah, WA, United StatesHQ checked Sep 28, 2026201-500147 contacts →

Indirect evidence

“For more than 30 years, CTS International has been filling highly technical jobs utilizing our streamlined recruitment process, superior services, and international expertise.”

Source: RevenueBase Database · checked Sep 28, 2026
17Strong evidenceBellevue, WA, United StatesHQ checked Sep 28, 2026201-500145 contacts →

Strong evidence

“Protingent is a specialized technical staffing firm connecting top IT and engineering professionals with leading technology companies across the U.S.”

Source: RevenueBase Database · checked Sep 28, 2026
18Partial evidenceWashington, MI, United StatesHQ checked Sep 28, 2026201-500141 contacts →

Partial evidence

“For more than 18 years, Axiem International has provided the highest quality Engineering deliverables and professionals to the Energy, Aerospace, Automotive & Industrial…”

Source: RevenueBase Database · checked Sep 28, 2026
19Indirect evidenceIrvine, CA, United StatesHQ checked Sep 28, 202651-200129 contacts →

Indirect evidence

“Having difficulty hiring strong teams for your hardware startup?”

Source: RevenueBase Database · checked Sep 28, 2026
20Indirect evidenceDublin, OH, United StatesHQ checked Sep 28, 202651-200129 contacts →

Indirect evidence

“At Omni One, we believe there is a better way to do recruiting.”

Source: RevenueBase Database · checked Sep 28, 2026
21Indirect evidenceCampbell, CA, United StatesHQ checked Sep 28, 202651-200121 contacts →

Indirect evidence

Source: RevenueBase Database · checked Sep 28, 2026
22Indirect evidenceSan Leandro, CA, United StatesHQ checked Sep 28, 202651-200118 contacts →

Indirect evidence

“For almost a decade, Human Bees has been building lasting professional relationships by focusing on trust.”

Source: RevenueBase Database · checked Sep 28, 2026
23Strong evidenceBrookfield, WI, United StatesHQ checked Sep 28, 2026201-500118 contacts →

Strong evidence

“STS Technical Services specializes in staffing and engineering solutions that are best designed to support the OEM, government and production sectors.”

Source: RevenueBase Database · checked Sep 28, 2026
24Partial evidenceParsippany, NJ, United StatesHQ checked Sep 28, 202611-50117 contacts →

Partial evidence

“Ever collaborated with Recruiters who are degreed engineers?”

Source: RevenueBase Database · checked Sep 28, 2026
25Partial evidenceWyomissing, PA, United StatesHQ checked Sep 28, 202651-200116 contacts →

Partial evidence

“RPA Engineering is a professional engineering consulting firm offering mechanical, electrical, structural, and automations systems engineering discipline services, including…”

Source: RevenueBase Database · checked Sep 28, 2026

Showing 25 of 768 design engineers staffing companies based in the United States

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Design engineers staffing companies based in the United States at a glance

As of Sep 28, 2026
24.0%Verified-email coverage
18.9Average contacts per company
11-50Median size (employees)
2.9%Largest-city concentration · Houston
Sep 28, 2026Page data refreshed

Companies by employee count

1-10
371
11-50
234
51-200
107
201-500
41
501-1,000
9
1,001-5,000
3
5,001-10,000
1
10001+
2

Email recency for this list is measured worldwide rather than for United States, so it is reported there. Company counts and contact totals on this page are exact for United States, over 768 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 design engineers 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 the United States whose own description of what they do matches “design engineers 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 design engineers 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 design engineers staffing companies, 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 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, 3,480 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.

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 design engineers 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 design engineers staffing companies are there based in the United States?

RevenueBase identified 768 design engineers staffing companies 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?

Volt Technical Resources, headquartered in Orange, tops this list with the largest team on record.

Which city has the most design engineers staffing companies?

Houston leads with 22 headquartered companies, followed by Austin (19) and San Jose (14).

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 3,480 verified decision-maker contacts tracked across these 768 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.