Company lists · Data refreshed September 2026

Top 25 Operational technology consulting firms based in the United States

Name: Operational technology consulting firms based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 29, 2026 7,859 companies tracked

RevenueBase identified 7,859 operational technology consulting firms headquartered in the United States as of September 2026 and tracks 133,678 professional contacts across them, including 47,222 with verified work emails. Houston is the largest hub.

This list covers operational technology consulting firms 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 29, 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 29, 2026 86% judged on-target in blind review

7,859Companies

133,678Contacts tracked

47,222Verified emails

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The 25 largest operational technology consulting firms based in the United States

Ranked by team size

Top 25 of 7,859 operational technology consulting firms based in the United States, ranked by team size, largest first. Data refreshed Sep 29, 2026. RevenueBase Smart Search rates how each company's information relates to operational technology consulting 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	Protiviti	Partial evidence	Menlo Park, CA, United StatesHQ checked Sep 29, 2026	5,001-10,000	8,779 contacts →
	Partial evidence “Protiviti is a global consulting firm that delivers deep expertise, objective insights, a tailored approach and unparalleled collaboration to help leaders confidently face the…” Source: RevenueBase Database · checked Sep 29, 2026
2	Genpact Headstrong Capital Markets	Partial evidence	Reston, VA, United StatesHQ checked Sep 29, 2026	10001+	3,109 contacts →
	Partial evidence “Genpact Headstrong Capital Markets is a global consulting and IT services company with a specialized focus in capital markets.” Source: RevenueBase Database · checked Sep 29, 2026
3	AHEAD	Indirect evidence	Chicago, IL, United StatesHQ checked Sep 29, 2026	1,001-5,000	2,989 contacts →
	Indirect evidence “AHEAD accelerates strategy into execution by engineering integrated solutions across infrastructure, applications, data, and security.” Source: RevenueBase Database · checked Sep 29, 2026
4	Entrust Solutions Group	Partial evidence	Lisle, IL, United StatesHQ checked Sep 29, 2026	1,001-5,000	2,966 contacts →
	Partial evidence “ENTRUST Solutions Group, an ENR Top 100 company, provides comprehensive and dependable engineering, consulting, and automation services to pipeline companies, gas and electric…” Source: RevenueBase Database · checked Sep 29, 2026
5	Hexagon Asset Lifecycle Intelligence	Indirect evidence	Madison, AL, United StatesHQ checked Sep 29, 2026	10001+	2,630 contacts →
	Indirect evidence “Hexagon’s Asset Lifecycle Intelligence division helps clients design, construct and operate more profitable, safe and sustainable industrial facilities.” Source: RevenueBase Database · checked Sep 29, 2026
6	Speridian Technologies	Strong evidence	Albuquerque, NM, United StatesHQ checked Sep 29, 2026	1,001-5,000	2,619 contacts →
	Strong evidence “Speridian Technologies is a global consulting and technology services firm that helps enterprises and public sector organizations modernize operations, enhance customer experience…” Source: RevenueBase Database · checked Sep 29, 2026
7	Trace3	Indirect evidence	Irvine, CA, United StatesHQ checked Sep 29, 2026	1,001-5,000	1,345 contacts →
	Indirect evidence “Trace3 delivers business transformation.” Source: RevenueBase Database · checked Sep 29, 2026
8	PAS	Indirect evidence	Houston, TX, United StatesHQ checked Sep 29, 2026	201-500	1,231 contacts →
	Indirect evidence “PAS, part of Hexagon's Asset Lifecycle Intelligence division, delivers software solutions that prevent, detect, & remediate cyber threats, reduce process safety risks, and…” Source: RevenueBase Database · checked Sep 29, 2026
9	Englobal	Indirect evidence	Houston, TX, United StatesHQ checked Sep 29, 2026	201-500	1,183 contacts →
	Indirect 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 29, 2026
10	Rovisys	Indirect evidence	Aurora, OH, United StatesHQ checked Sep 29, 2026	1,001-5,000	1,159 contacts →
	Indirect evidence “As one of the world's largest independent systems integrators, RoviSys delivers comprehensive automation, digital transformation, manufacturing execution (MES), Industrial AI…” Source: RevenueBase Database · checked Sep 29, 2026
11	Captech	Strong evidence	Richmond, VA, United StatesHQ checked Sep 29, 2026	1,001-5,000	1,005 contacts →
	Strong evidence “CapTech is a technology consulting firm focused on defining and delivering what’s next for organizations.” Source: RevenueBase Database · checked Sep 29, 2026
12	Interstates	Strong evidence	Sioux Center, IA, United StatesHQ checked Sep 29, 2026	1,001-5,000	938 contacts →
	Strong evidence “As a Partner Interstates is your trusted partner for electrical, automation, and operational technology needs.” Source: RevenueBase Database · checked Sep 29, 2026
13	Intech Automation & Intelligence	Partial evidence	Houston, TX, United StatesHQ checked Sep 29, 2026	501-1,000	879 contacts →
	Partial evidence “INTECH Automation & Intelligence is a globally renowned industrial automation & digitalization technology company.” Source: RevenueBase Database · checked Sep 29, 2026
14	Prime Controls	Indirect evidence	Lewisville, TX, United StatesHQ checked Sep 29, 2026	1,001-5,000	857 contacts →
	Indirect evidence “Prime Controls was established as a Main Automation Contractor to provide customers a sole source solution for Industrial Automation services and products.” Source: RevenueBase Database · checked Sep 29, 2026
15	Buchanan Technologies	Strong evidence	Grapevine, TX, United StatesHQ checked Sep 29, 2026	501-1,000	818 contacts →
	Strong evidence “As a leading IT consulting and outsourcing services firm, Buchanan Technologies helps organizations across North America turn their business technology into a powerful competitive…” Source: RevenueBase Database · checked Sep 29, 2026
16	Mobilecomm Professionals, INC	Indirect evidence	Richardson, TX, United StatesHQ checked Sep 29, 2026	501-1,000	706 contacts →
	Indirect evidence “MobileComm is now fully integrated with UST.” Source: RevenueBase Database · checked Sep 29, 2026
17	Altman Solon	Partial evidence	Boston, MA, United StatesHQ checked Sep 29, 2026	501-1,000	669 contacts →
	Partial evidence “In 2020, Altman Vilandrie & Company and Solon Management Consulting cemented a decades-long partnership across the Atlantic to form Altman Solon, the world’s largest global…” Source: RevenueBase Database · checked Sep 29, 2026
18	Ciber Global	Indirect evidence	Troy, MI, United StatesHQ checked Sep 29, 2026	5,001-10,000	646 contacts →
	Indirect evidence “Ciber Global is now HTC Global Services with effect from November 30, 2021.” Source: RevenueBase Database · checked Sep 29, 2026
19	Thirdware Solution INC	Partial evidence	Livonia, MI, United StatesHQ checked Sep 29, 2026	1,001-5,000	642 contacts →
	Partial evidence “Thirdware Solution is a IT consulting organization headquartered in Livonia (Michigan), USA and with offices in Europe and Asia.” Source: RevenueBase Database · checked Sep 29, 2026
20	Analytix Solutions	Indirect evidence	Woburn, MA, United StatesHQ checked Sep 29, 2026	501-1,000	640 contacts →
	Indirect evidence “Welcome to Analytix Solutions!” Source: RevenueBase Database · checked Sep 29, 2026
21	Setpoint Integrated Solutions, INC	Indirect evidence	Baton Rouge, LA, United StatesHQ checked Sep 29, 2026	501-1,000	626 contacts →
	Indirect evidence “Setpoint Integrated Solutions, a Vytl Company is a leading integrated solutions and services provider in the process control industry.” Source: RevenueBase Database · checked Sep 29, 2026
22	Mentormate	Indirect evidence	Minneapolis, MN, United StatesHQ checked Sep 29, 2026	1,001-5,000	626 contacts →
	Indirect evidence “MentorMate is now Tieto!” Source: RevenueBase Database · checked Sep 29, 2026
23	Wunderlich-Malec Engineering, INC	Indirect evidence	Eden Prairie, MN, United StatesHQ checked Sep 29, 2026	501-1,000	623 contacts →
	Indirect evidence “Wunderlich-Malec Engineering is a nationally recognized, 100% employee-owned leader in advanced engineering and control system solutions.” Source: RevenueBase Database · checked Sep 29, 2026
24	Prov International	Strong evidence	Tampa, FL, United StatesHQ checked Sep 29, 2026	501-1,000	612 contacts →
	Strong evidence “ProV is an award winning global technology consulting firm.” Source: RevenueBase Database · checked Sep 29, 2026
25	E Tech Group	Indirect evidence	West Chester, OH, United StatesHQ checked Sep 29, 2026	501-1,000	610 contacts →
	Indirect evidence “E Tech Group is one of the largest engineering and system integration firms in the United States.” Source: RevenueBase Database · checked Sep 29, 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: operational technology consulting 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 operational technology consulting firms.
Partial evidence: Its own public description names part of operational technology consulting firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name operational technology consulting 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 7,859 operational technology consulting firms based in the United States

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Operational technology consulting firms based in the United States at a glance

As of Sep 29, 2026

35.3%Verified-email coverage

17.0Average contacts per company

1-10Median size (employees)

3.6%Largest-city concentration · Houston

Sep 29, 2026Page data refreshed

Companies by employee count

1-10

4,772

11-50

2,065

51-200

728

201-500

172

501-1,000

1,001-5,000

5,001-10,000

10001+

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 7,859 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 operational technology consulting 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 the United States whose own description of what they do matches “operational technology consulting 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 operational technology consulting 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 operational technology consulting firms, 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, 47,222 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 29, 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.

Operational technology consulting firms by metro

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 operational technology consulting 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 operational technology consulting firms are there based in the United States?

RevenueBase identified 7,859 operational technology consulting firms 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?

Protiviti, headquartered in Menlo Park, tops this list with the largest team on record.

Which city has the most operational technology consulting firms?

Houston leads with 279 headquartered companies, followed by New York (266) and Chicago (151).

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 47,222 verified decision-maker contacts tracked across these 7,859 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 29, 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.