Company lists · Data refreshed September 2026

Top 25 Engineering consultancy firms based in Lafayette, United States

Name: Engineering consultancy firms based in Lafayette, United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 27, 2026 44 companies tracked

RevenueBase identified 44 engineering consultancy firms headquartered in Lafayette, United States as of September 2026 and tracks 1,456 professional contacts across them, including 560 with verified work emails. Across the United States, Houston is the largest hub for this category (537 companies); Lafayette has 44.

This list covers engineering consultancy firms headquartered in Lafayette, 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 27, 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 27, 2026 86% judged on-target in blind review

44Companies

1,456Contacts tracked

560Verified emails

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The 25 largest engineering consultancy firms based in Lafayette, United States

Ranked by team size

Top 25 of 44 engineering consultancy firms based in Lafayette, United States, ranked by team size, largest first. Data refreshed Sep 27, 2026. RevenueBase Smart Search rates how each company's information relates to engineering consultancy firms: 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	ATC Group Services LLC	Indirect evidence	Lafayette, LA, United StatesHQ checked Sep 27, 2026	1,001-5,000	865 contacts →
	Indirect evidence “ATC Group Services LLC is now Atlas.” Source: RevenueBase Database · checked Sep 27, 2026
2	Fenstermaker	Indirect evidence	Lafayette, LA, United StatesHQ checked Sep 27, 2026	201-500	205 contacts →
	Indirect evidence “C.” Source: RevenueBase Database · checked Sep 27, 2026
3	Stokes & Spiehler	Indirect evidence	Lafayette, LA, United StatesHQ checked Sep 27, 2026	11-50	76 contacts →
	Indirect evidence “March 21, 2023, marked an important milestone for Stokes & Spiehler.a half century serving the oil & gas industry!” Source: RevenueBase Database · checked Sep 27, 2026
4	ADG Engineering	Partial evidence	Lafayette, LA, United StatesHQ checked Sep 27, 2026	11-50	31 contacts →
	Partial evidence “Established in 1981, ADG Engineering is the definitive choice in complex, critical systems engineering.” Source: RevenueBase Database · checked Sep 27, 2026
5	Chapman Consulting, INC	Partial evidence	Lafayette, LA, United StatesHQ checked Sep 27, 2026	11-50	29 contacts →
	Partial evidence “Chapman Consulting, Inc.(CCI) is a full-service engineering and project management consulting firm serving all sectors of the petroleum industry.” Source: RevenueBase Database · checked Sep 27, 2026
6	ECL Engineering Corporation Of Louisiana	Partial evidence	Lafayette, LA, United StatesHQ checked Sep 27, 2026	51-200	25 contacts →
	Partial evidence “ECL, a multi-disciplined engineering firm servicing the oil and gas industry since 1982, provides detailed design packages to customers for upstream projects worldwide.” Source: RevenueBase Database · checked Sep 27, 2026
7	Drexel, Barrell & CO	Indirect evidence	Lafayette, CO, United StatesHQ checked Sep 27, 2026	11-50	23 contacts →
	Indirect evidence “Seven decades of continuous, locally-owned and operated service in Colorado.” Source: RevenueBase Database · checked Sep 27, 2026
8	Petra Consultants, INC	Strong evidence	Lafayette, LA, United StatesHQ checked Sep 27, 2026	11-50	18 contacts →
	Strong evidence “For more than 24 years, Petra Consultants has provided Engineering, Design, Regulatory, Project Management, and Construction Management services to energy producers.” Source: RevenueBase Database · checked Sep 27, 2026
9	Tbird Design Services Corp	Indirect evidence	Lafayette, IN, United StatesHQ checked Sep 27, 2026	11-50	18 contacts →
	Indirect evidence “TBIRD Design Services Corporation is a modern and forward thinking corporation with an experienced staff, established on a firm foundation of technical excellence and customer…” Source: RevenueBase Database · checked Sep 27, 2026
10	Huval & Associates, INC	Indirect evidence	Lafayette, LA, United StatesHQ checked Sep 27, 2026	11-50	16 contacts →
	Indirect evidence “OUR MISSION: To relentlessly provide our clients with exceptional service, innovation, quality, and value that has defined our reputation in the past and will sustain it in the…” Source: RevenueBase Database · checked Sep 27, 2026
11	Practical Engineering Solutions PES	Partial evidence	Lafayette, LA, United StatesHQ checked Sep 27, 2026	11-50	15 contacts →
	Partial evidence “Practical Engineering Solutions (PES) was founded in 2010 as a mechanical engineering project services firm focused on solving complex industrial challenges with speed, precision…” Source: RevenueBase Database · checked Sep 27, 2026
12	Case International, INC	Partial evidence	Lafayette, LA, United StatesHQ checked Sep 27, 2026	11-50	13 contacts →
	Partial evidence “CASE International (CASE) is a professional engineering firm headquartered in Lafayette, Louisiana.” Source: RevenueBase Database · checked Sep 27, 2026
13	Arkor Architects & Engineers	Partial evidence	Lafayette, IN, United StatesHQ checked Sep 27, 2026	1-10	11 contacts →
	Partial evidence “ARKOR Architects & Engineers: Architecture and structural engineering services for commercial, industrial, and residential building projects.” Source: RevenueBase Database · checked Sep 27, 2026
14	WMD Squared Engineering	Partial evidence	Lafayette, LA, United StatesHQ checked Sep 27, 2026	11-50	9 contacts →
	Partial evidence “We love to tackle difficult design, drafting and engineering problems.” Source: RevenueBase Database · checked Sep 27, 2026
15	Team Management & Consulting, LLC	Indirect evidence	Lafayette, LA, United StatesHQ checked Sep 27, 2026	11-50	9 contacts →
	Indirect evidence “Team Management & Consulting LLC is a leader in project management, decommissioning and abandonment, turnaround, tank and terminal, commissioning and startup, pipe structural…” Source: RevenueBase Database · checked Sep 27, 2026
16	Upright Engineering	Partial evidence	Lafayette, CA, United StatesHQ checked Sep 27, 2026	1-10	7 contacts →
	Partial evidence “Upright Engineering is an established structural and civil engineering firm based in Lafayette, California, serving the greater San Francisco Bay Area.” Source: RevenueBase Database · checked Sep 27, 2026
17	Chalmers, Collins & Alwell, INC	Indirect evidence	Lafayette, LA, United StatesHQ checked Sep 27, 2026	1-10	6 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 27, 2026
18	Sellers & Associates, INC	Indirect evidence	Lafayette, LA, United StatesHQ checked Sep 27, 2026	11-50	6 contacts →
	Indirect evidence “Our expertise covers a wide spectrum, from coastal protection and roadway enhancements to wastewater treatment and land surveying.” Source: RevenueBase Database · checked Sep 27, 2026
19	Hurst & Associates, INC	Partial evidence	Lafayette, CO, United StatesHQ checked Sep 27, 2026	11-50	5 contacts →
	Partial evidence “Providing excellence in design since 1986, Hurst & Associates provides civil engineering, landscape architecture, land planning, and surveying services to private and public…” Source: RevenueBase Database · checked Sep 27, 2026
20	Parish Architecture	Indirect evidence	Lafayette, LA, United StatesHQ checked Sep 27, 2026	1-10	5 contacts →
	Indirect evidence “Parish Architecture is positioned to provide the expertise and quality of service that only years of professional practice and experience could make possible.” Source: RevenueBase Database · checked Sep 27, 2026
21	Kourco Environmental Services, INC	Indirect evidence	Lafayette, LA, United StatesHQ checked Sep 27, 2026	11-50	4 contacts →
	Indirect evidence “KourCo Environmental Services, Inc.(KES) is a certified Woman-Owned environmental consulting and service firm.” Source: RevenueBase Database · checked Sep 27, 2026
22	Complete Project Solutions, INC	Indirect evidence	Lafayette, CA, United StatesHQ checked Sep 27, 2026	1-10	4 contacts →
	Indirect evidence “We are an elite team of professionals dedicated to project delivery excellence.” Source: RevenueBase Database · checked Sep 27, 2026
23	Prouet Architecture & Engineering	Indirect evidence	Lafayette, LA, United StatesHQ checked Sep 27, 2026	1-10	3 contacts →
	Indirect evidence “A multi-disciplinary design firm based in Lafayette, Louisiana, celebrating over 40 years of professional service in our local communities and beyond.” Source: RevenueBase Database · checked Sep 27, 2026
24	Foley Engineering, LLC	Partial evidence	Lafayette, LA, United StatesHQ checked Sep 27, 2026	1-10	2 contacts →
	Partial evidence “Foley Engineering, LLC provides professional engineering services to the oil industry in Louisiana and Texas.” Source: RevenueBase Database · checked Sep 27, 2026
25	Scholer Corp	Partial evidence	Lafayette, IN, United StatesHQ checked Sep 27, 2026	1-10	2 contacts →
	Partial evidence “Scholer Corporation Architecture, Engineering, Interiors Providing client focused Architectural and Engineeing services for 75 years.” Source: RevenueBase Database · checked Sep 27, 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: engineering consultancy firms. 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 engineering consultancy firms.
Partial evidence: Its own public description names part of engineering consultancy firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name engineering consultancy firms. 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 44 engineering consultancy firms based in Lafayette, United States

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Engineering consultancy firms based in Lafayette, United States at a glance

As of Sep 27, 2026

38.5%Verified-email coverage

33.1Average contacts per company

11-50Median size (employees)

Sep 27, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

1,001-5,000

Email recency for this list is measured across the whole United States list rather than for Lafayette, so it is reported there. Company counts and contact totals on this page are exact for Lafayette, over 44 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 engineering consultancy firms, 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 Lafayette, United States whose own description of what they do matches “engineering consultancy firms”. 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 engineering consultancy firms), 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 engineering consultancy firms, and records with no verified work email. Companies headquartered outside Lafayette 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, 560 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 27, 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.

Engineering consultancy firms 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 engineering consultancy firms, 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 engineering consultancy firms are there based in Lafayette, United States?

RevenueBase identified 44 engineering consultancy firms headquartered in Lafayette, 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?

ATC Group Services LLC, headquartered in Lafayette, tops this list with the largest team on record.

Which city in the United States has the most engineering consultancy firms?

Houston leads the United States with 537 headquartered companies, followed by New York (412) and Chicago (189). Lafayette has 44.

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 560 verified decision-maker contacts tracked across these 44 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 27, 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.