Company lists · Data refreshed September 2026

Top 25 Environmental engineering staffing companies based in Dallas, United States

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

Compiled by the RevenueBase Data Team Data refreshed Sep 28, 2026 73 companies tracked

RevenueBase identified 73 environmental engineering staffing companies headquartered in Dallas, United States as of September 2026 and tracks 2,680 professional contacts across them, including 947 with verified work emails. Across the United States, Houston is the largest hub for this category (215 companies); Dallas has 73.

This list covers environmental engineering staffing companies headquartered in Dallas, 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

73Companies

2,680Contacts tracked

947Verified emails

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The 25 largest environmental engineering staffing companies based in Dallas, United States

Ranked by team size

Top 25 of 73 environmental engineering staffing companies based in Dallas, United States, ranked by team size, largest first. Data refreshed Sep 28, 2026. RevenueBase Smart Search rates how each company's information relates to environmental 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	Trinity Consultants	Partial evidence	Dallas, TX, United StatesHQ checked Sep 28, 2026	1,001-5,000	961 contacts →
	Partial evidence “Trinity Consultants is a global team of experts helping organizations solve complex challenges in environmental compliance, ecological protection, infrastructure performance, and…” Source: RevenueBase Database · checked Sep 28, 2026
2	Paladin Consulting	Indirect evidence	Dallas, TX, United StatesHQ checked Sep 28, 2026	1,001-5,000	198 contacts →
	Indirect evidence “Paladin Consulting is a nationwide Talent Acquisition and Placement consulting firm.” Source: RevenueBase Database · checked Sep 28, 2026
3	Core Personnel Staffing Services	Partial evidence	Dallas, TX, United StatesHQ checked Sep 28, 2026	501-1,000	175 contacts →
	Partial evidence “Core Personnel is a premiere staffing agency with offices in Dallas, Houston, Austin and Las Vegas.” Source: RevenueBase Database · checked Sep 28, 2026
4	Frontline Source Group	Partial evidence	Dallas, TX, United StatesHQ checked Sep 28, 2026	201-500	172 contacts →
	Partial evidence “Frontline Source Group: Your Strategic Staffing Partner At Frontline Source Group, we elevate professional staffing through our core philosophy:"People.” Source: RevenueBase Database · checked Sep 28, 2026
5	Ensolum, LLC	Partial evidence	Dallas, TX, United StatesHQ checked Sep 28, 2026	51-200	136 contacts →
	Partial evidence “OUR MISSION is to combine sustainable environmental solutions with forward-thinking, cost-effective, innovative, and value-added technologies that balance our clients’ economic…” Source: RevenueBase Database · checked Sep 28, 2026
6	RPC Company	Indirect evidence	Dallas, TX, United StatesHQ checked Sep 28, 2026	11-50	106 contacts →
	Indirect evidence “RPC provides high-quality candidates for temporary, temp-to-hire, and direct hire positions throughout the United States.” Source: RevenueBase Database · checked Sep 28, 2026
7	Welcometech	Partial evidence	Dallas, TX, United StatesHQ checked Sep 28, 2026	11-50	101 contacts →
	Partial evidence “A leader in the recruitment and placement of professionals from various verticals like Healthcare, Healthcare IT, Law Enforcement and Corrections, Engineering, IT (Information…” Source: RevenueBase Database · checked Sep 28, 2026
8	American Trades Contracting	Indirect evidence	Dallas, TX, United StatesHQ checked Sep 28, 2026	1,001-5,000	99 contacts →
	Indirect evidence “American Trades Contracting was founded in 2009 with both the needs of the Clients and the needs of the Skilled worker in mind.” Source: RevenueBase Database · checked Sep 28, 2026
9	Imprimis Group	Partial evidence	Dallas, TX, United StatesHQ checked Sep 28, 2026	51-200	68 contacts →
	Partial evidence “Imprimis Group delivers a myriad of staffing, training and outsourcing services to match qualified candidates with respected companies throughout Texas.” Source: RevenueBase Database · checked Sep 28, 2026
10	Tekk Force	Partial evidence	Dallas, TX, United StatesHQ checked Sep 28, 2026	11-50	34 contacts →
	Partial evidence “Tekk Force LLC began as a local, Texas-based staffing company and has grown into a nationwide staffing service provider with an extensive database of candidates spanning the U.S.” Source: RevenueBase Database · checked Sep 28, 2026
11	Sabio Infotech INC	Partial evidence	Dallas, TX, United StatesHQ checked Sep 28, 2026	51-200	23 contacts →
	Partial evidence “Sabio staffing experts know tech.” Source: RevenueBase Database · checked Sep 28, 2026
12	Birkhoff, Hendricks & Carter, L.L.P	Partial evidence	Dallas, TX, United StatesHQ checked Sep 28, 2026	11-50	18 contacts →
	Partial evidence “BHC’s roots were founded in Dallas, Texas in 1969 to provide professional engineering services to municipalities and other governmental agencies.” Source: RevenueBase Database · checked Sep 28, 2026
13	Rightstaff INC	Partial evidence	Dallas, TX, United StatesHQ checked Sep 28, 2026	11-50	18 contacts →
	Partial evidence “RightStaff is a nationwide professional services and staffing solutions partner.” Source: RevenueBase Database · checked Sep 28, 2026
14	MV Engineering, INC	Indirect evidence	Dallas, TX, United StatesHQ checked Sep 28, 2026	11-50	17 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 28, 2026
15	Dallas Employment Services	Indirect evidence	Dallas, TX, United StatesHQ checked Sep 28, 2026	11-50	17 contacts →
	Indirect evidence “Join our Talent Network by visiting our website and clicking the "Join our Talent Network" button.” Source: RevenueBase Database · checked Sep 28, 2026
16	Envirophase	Partial evidence	Dallas, TX, United StatesHQ checked Sep 28, 2026	11-50	14 contacts →
	Partial evidence “EnviroPhase is an environmental consulting firm serving clients in commercial and industrial property, development and banking.” Source: RevenueBase Database · checked Sep 28, 2026
17	Arredondo, Zepeda & Brunz, LLC An Ardurra Company	Indirect evidence	Dallas, TX, United StatesHQ checked Sep 28, 2026	51-200	12 contacts →
	Indirect evidence “With our 42-year successful track record of meeting external and internal client needs, Arredondo, Zepeda & Brunz, LLC (AZ & B) is an established Texas firm with 85 employees.” Source: RevenueBase Database · checked Sep 28, 2026
18	JQ Infrastructure	Partial evidence	Dallas, TX, United StatesHQ checked Sep 28, 2026	11-50	12 contacts →
	Partial evidence “JQ Infrastructure (JQ) was established on the principles of providing high quality engineering services to its municipal clients in all types of municipal infrastructure analysis…” Source: RevenueBase Database · checked Sep 28, 2026
19	Geoscience Engineers, LLC	Indirect evidence	Dallas, TX, United StatesHQ checked Sep 28, 2026	11-50	12 contacts →
	Indirect evidence “Registered in the State of Texas in 1985, Geoscience has provided services to a wide range of industries throughout Texas, as well as other states such as Oklahoma, Tennessee…” Source: RevenueBase Database · checked Sep 28, 2026
20	Hayden Consultants, Inc., A GEI Company	Indirect evidence	Dallas, TX, United StatesHQ checked Sep 28, 2026	11-50	12 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 28, 2026
21	Technical Resource Group	Indirect evidence	Dallas, TX, United StatesHQ checked Sep 28, 2026	51-200	12 contacts →
	Indirect evidence “Technical Resource Group (TRG) was established in 1989 and subsequently experienced an average of 43% annual growth in its first 10 years.” Source: RevenueBase Database · checked Sep 28, 2026
22	Prodigy Placements	Indirect evidence	Dallas, TX, United StatesHQ checked Sep 28, 2026	1-10	12 contacts →
	Indirect evidence “Prodigy Placements’ Philosophy We believe in working with professionals who possess integrity and a commitment to act as a true business partner for both our clients and…” Source: RevenueBase Database · checked Sep 28, 2026
23	Eagle Tech Consultants	Indirect evidence	Dallas, TX, United StatesHQ checked Sep 28, 2026	11-50	10 contacts →
	Indirect evidence “Eagle Tech understands how crucial it is to find the right person for any team.” Source: RevenueBase Database · checked Sep 28, 2026
24	Preferred Staff	Partial evidence	Dallas, TX, United StatesHQ checked Sep 28, 2026	201-500	9 contacts →
	Partial evidence “We are a staffing company that provides temporary staff, leased labor for short-term and long-term contracts as well as temp-to-hire permanent employees – and so much more!” Source: RevenueBase Database · checked Sep 28, 2026
25	Nickerson Talent Solutions	Partial evidence	Dallas, TX, United StatesHQ checked Sep 28, 2026	11-50	9 contacts →
	Partial evidence “We are a premier provider of staffing solutions for businesses across a wide range of industries.” 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: environmental 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 environmental engineering staffing companies.
Partial evidence: Its own public description names part of environmental 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 environmental 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 73 environmental engineering staffing companies based in Dallas, United States

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Environmental engineering staffing companies based in Dallas, United States at a glance

As of Sep 28, 2026

35.3%Verified-email coverage

36.7Average 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 Dallas, so it is reported there. Company counts and contact totals on this page are exact for Dallas, over 73 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 environmental 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 Dallas, United States whose own description of what they do matches “environmental 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 environmental 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 environmental engineering staffing companies, and records with no verified work email. Companies headquartered outside Dallas 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, 947 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.

Environmental 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 environmental 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 environmental engineering staffing companies are there based in Dallas, United States?

RevenueBase identified 73 environmental engineering staffing companies headquartered in Dallas, 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?

Trinity Consultants, headquartered in Dallas, tops this list with the largest team on record.

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

Houston leads the United States with 215 headquartered companies, followed by New York (99) and Dallas (73).

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 947 verified decision-maker contacts tracked across these 73 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.