Company lists · Data refreshed September 2026

Top 25 Controls engineering staffing based in the United States

Name: Controls engineering staffing based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 1, 2026 1,030 companies tracked

RevenueBase identified 1,030 controls engineering staffing headquartered in the United States as of September 2026 and tracks 18,817 professional contacts across them, including 4,408 with verified work emails and 6,469 with mobile numbers. Houston is the largest hub.

This list covers controls engineering staffing 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 1, 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 RevenueBase Smart Search rating on every row Refreshed Sep 1, 2026 86% judged on-target in blind review

1,030Companies

18,817Contacts tracked

4,408Verified emails

6,469Mobile numbers

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The 25 largest controls engineering staffing based in the United States

Ranked by team size

Top 25 of 1,030 controls engineering staffing based in the United States, ranked by team size, largest first. Data refreshed Sep 1, 2026. RevenueBase Smart Search rates how each company's information relates to controls engineering staffing: 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	Englobal	Partial evidence	Houston, TX, United States	201-500	1,185 contacts →
	Partial evidence “Who We Are Englobal Founded in 1985, ENGlobal (NASDAQ: ENG) is a specialty engineering services firm that focuses on automation solutions and select EPCM projects for the energy…” Source: RevenueBase Database · checked Sep 1, 2026
2	Wunderlich-Malec Engineering, INC	Strong evidence	Lakewood, CO, United States	501-1,000	617 contacts →
	Strong evidence “Wunderlich-Malec Engineering is a nationally recognized, 100% employee-owned leader in advanced engineering and control system solutions.” Source: RevenueBase Database · checked Sep 1, 2026
3	Volt Technical Resources	Indirect evidence	Orange, CA, United States	5,001-10,000	585 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 1, 2026
4	Contech Control Services	Partial evidence	Beaumont, TX, United States	1,001-5,000	520 contacts →
	Partial evidence “When we formed Contech in 1980, our goal was to create a specialized engineering and construction company to provide a full range of system independent services for process…” Source: RevenueBase Database · checked Sep 1, 2026
5	Entegee	Partial evidence	Burlington, MA, United States	201-500	463 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 1, 2026
6	Sterling Engineering	Strong evidence	Westchester, IL, United States	501-1,000	402 contacts →
	Strong evidence “Sterling is an award-winning professional engineering consulting and technical staffing company.” Source: RevenueBase Database · checked Sep 1, 2026
7	C4 Technical Services	Indirect evidence	Eagan, MN, United States	501-1,000	222 contacts →
	Indirect evidence “C4 Technical Services knows the right people in IT and Telecom C4 Technical Services earns the trust of our clients and candidates by understanding the needs of both, matching…” Source: RevenueBase Database · checked Sep 1, 2026
8	Ryzen Solutions	Indirect evidence	San Jose, CA, United States	201-500	193 contacts →
	Indirect evidence “Since Ryzen Solutions has become a trusted provider to Silicon Valley’s growing product development community.” Source: RevenueBase Database · checked Sep 1, 2026
9	Proautomated	Indirect evidence	Newark, DE, United States	201-500	190 contacts →
	Indirect evidence “We understand you want to be recognized for your reputation of reliable and efficient project completion.” Source: RevenueBase Database · checked Sep 1, 2026
10	LER Techforce	Partial evidence	Columbus, IN, United States	201-500	188 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 1, 2026
11	Electro Design Engineering, INC	Partial evidence	Riverview, FL, United States	201-500	177 contacts →
	Partial evidence “Electro Design Engineering, Inc.(EDE) is a respected provider of engineering, automation, and construction services to a wide range of industries and markets coast to coast and…” Source: RevenueBase Database · checked Sep 1, 2026
12	CTS International	Indirect evidence	Issaquah, WA, United States	201-500	147 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 1, 2026
13	Judge Direct Placement	Indirect evidence	West Chester, PA, United States	1,001-5,000	127 contacts →
	Indirect evidence “JUDGE DIRECT PLACEMENT, with over 45 years of experience, is a leading provider of top management talent to companies nationwide, with a focus in the areas of Manufacturing…” Source: RevenueBase Database · checked Sep 1, 2026
14	Solid Personnel	Partial evidence	Austin, TX, United States	201-500	120 contacts →
	Partial evidence “SOLID Personnel, Inc-"Expertise to Get Things Done" SOLID Personnel is a nationwide specialized recruiting & staffing firm.” Source: RevenueBase Database · checked Sep 1, 2026
15	C2c Technical Services	Indirect evidence	League City, TX, United States	201-500	90 contacts →
	Indirect evidence “C2C Technical Services is a client oriented company committed to matching high quality employees to challenging positions in the oil & gas, chemical, power, industrial gases, and…” Source: RevenueBase Database · checked Sep 1, 2026
16	Trillium Professional	Strong evidence	Dedham, MA, United States	201-500	87 contacts →
	Strong evidence “Since 1984, Trillium Technical and its affiliates have been staffing professional IT and Engineering candidates in positions around the country.” Source: RevenueBase Database · checked Sep 1, 2026
17	Genesis Technical & Industrial Staffing	Strong evidence	Mobile, AL, United States	1,001-5,000	81 contacts →
	Strong evidence “At Genesis Technical & Industrial Staffing, we connect top engineering, design, technical, and industrial professionals with leading companies nationwide.” Source: RevenueBase Database · checked Sep 1, 2026
18	Bentley Global Resources And Staffing Services	Partial evidence	Oldsmar, FL, United States	201-500	79 contacts →
	Partial evidence “Bentley Global Resources provides high-end critically skilled contractors specializing in Hardware and Software Product Engineering to clients in need of such specialized skills.” Source: RevenueBase Database · checked Sep 1, 2026
19	Onesparq	Strong evidence	Cleveland, OH, United States	201-500	59 contacts →
	Strong evidence “OneSparQ is a national staffing and recruiting firm focused in Operations, Engineering and Technology.” Source: RevenueBase Database · checked Sep 1, 2026
20	Etcon Employment Solutions	Indirect evidence	Gainesville, GA, United States	1,001-5,000	59 contacts →
	Indirect evidence “ETCON Employment Solutions was founded in 1985 to serve employers seeking higher-quality candidates.” Source: RevenueBase Database · checked Sep 1, 2026
21	Tekberry, INC	Strong evidence	Santa Rosa, CA, United States	201-500	48 contacts →
	Strong evidence “Tekberry is a nationwide staffing partner with 25+ years of experience in engineering, manufacturing, and professional roles, connecting high-quality talent with organizations…” Source: RevenueBase Database · checked Sep 1, 2026
22	Hepco, INC	Strong evidence	Saddle Brook, NJ, United States	201-500	37 contacts →
	Strong evidence “HEPCO is an engineering staffing organization dedicated to providing technical industries with either contract or permanent personnel services.” Source: RevenueBase Database · checked Sep 1, 2026
23	Expert Staffing West	Indirect evidence	Oxnard, CA, United States	201-500	34 contacts →
	Indirect evidence “Technical Search Our expertise lies in presenting your employment opportunity to engineers and/or other professionals who are technically qualified, motivated by your position…” Source: RevenueBase Database · checked Sep 1, 2026
24	KCM Technical	Partial evidence	Troy, MI, United States	501-1,000	34 contacts →
	Partial evidence “At KCM Technical, we pride ourselves as being an employment services and staffing organization that is small enough to know you but large enough to service you.” Source: RevenueBase Database · checked Sep 1, 2026
25	Project Partners	Partial evidence	Laguna Hills, CA, United States	201-500	32 contacts →
	Partial evidence “Our Mission: Project Partners' mission is to help engineering professionals advance their careers-while providing our clients with access to flexible, top-tier engineering staff…” Source: RevenueBase Database · checked Sep 1, 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: controls engineering staffing. 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 controls engineering staffing.
Partial evidence: Its own public description names part of controls engineering staffing, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name controls engineering staffing. 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 1,030 controls engineering staffing based in the United States

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Controls engineering staffing based in the United States at a glance

As of Sep 1, 2026

23.4%Verified-email coverage

34.4%Mobile-number coverage

18.3Average contacts per company

1-10Median size (employees)

3.8%Largest-city concentration · Houston

Sep 1, 2026Page data refreshed

Companies by employee count

1-10

534

11-50

280

51-200

148

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

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 controls engineering staffing, 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 “controls engineering staffing”. 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 controls engineering staffing), 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 controls engineering staffing, 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, 4,408 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 1, 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.

Controls engineering staffing by metro

Controls engineering staffing in Houston39

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 controls engineering staffing, 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 controls engineering staffing are there based in the United States?

RevenueBase identified 1,030 controls engineering staffing 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?

Englobal, headquartered in Houston, tops this list with the largest team on record.

Which city has the most controls engineering staffing?

Houston leads with 39 headquartered companies, followed by Atlanta (15) and Austin (13).

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 4,408 verified decision-maker contacts tracked across these 1,030 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 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 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.