Company lists · Data refreshed September 2026

Top 25 As9120 consulting firms based in the United States

Name: As9120 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 27, 2026 995 companies tracked

RevenueBase identified 995 as9120 consulting firms headquartered in the United States as of September 2026 and tracks 7,658 professional contacts across them, including 2,030 with verified work emails. Houston is the largest hub.

This list covers as9120 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 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

995Companies

7,658Contacts tracked

2,030Verified emails

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The 25 largest as9120 consulting firms based in the United States

Ranked by team size

Top 25 of 995 as9120 consulting firms based in the United States, ranked by team size, largest first. Data refreshed Sep 27, 2026. RevenueBase Smart Search rates how each company's information relates to as9120 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	PKL Services	Indirect evidence	Poway, CA, United StatesHQ checked Sep 27, 2026	201-500	390 contacts →
	Indirect evidence “Headquartered in Poway, CA, PKL Services, Inc.” Source: RevenueBase Database · checked Sep 27, 2026
2	Robbins-Gioia, LLC	Indirect evidence	Alexandria, VA, United StatesHQ checked Sep 27, 2026	51-200	303 contacts →
	Indirect evidence “Optimize and modernize depot planning and scheduling to improve utilization, throughput and readiness now and in the future.#FutureReadinessToday” Source: RevenueBase Database · checked Sep 27, 2026
3	Hyde Engineering Consulting	Partial evidence	Louisville, CO, United StatesHQ checked Sep 27, 2026	201-500	253 contacts →
	Partial evidence “Hyde E+C is an international engineering consulting firm that helps companies operate more efficiently, get products to market more quickly, meet regulatory requirements more…” Source: RevenueBase Database · checked Sep 27, 2026
4	EAC Consulting, INC	Indirect evidence	Miami, FL, United StatesHQ checked Sep 27, 2026	51-200	142 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 27, 2026
5	Alton Aviation Consultancy	Partial evidence	New York, NY, United StatesHQ checked Sep 27, 2026	51-200	85 contacts →
	Partial evidence “Alton Aviation Consultancy has significant experience delivering large, complex consulting engagements for clients in aviation and aerospace.” Source: RevenueBase Database · checked Sep 27, 2026
6	L2 Aviation	Partial evidence	Dripping Springs, TX, United StatesHQ checked Sep 27, 2026	51-200	80 contacts →
	Partial evidence “L2 Aviation is a global avionics design, engineering, consulting, certification, and installation services company supporting a variety of modification and certification projects…” Source: RevenueBase Database · checked Sep 27, 2026
7	Plexus International	Partial evidence	Minneapolis, MN, United StatesHQ checked Sep 27, 2026	51-200	71 contacts →
	Partial evidence “Plexus International is a global leader in providing training, assessment, and consulting services for organizations to attain quality management systems excellence.” Source: RevenueBase Database · checked Sep 27, 2026
8	RE Build Answer Engineering	Partial evidence	Englewood, CO, United StatesHQ checked Sep 27, 2026	11-50	71 contacts →
	Partial evidence “Answer Engineering is an aviation & aerospace engineering consulting firm.” Source: RevenueBase Database · checked Sep 27, 2026
9	Regulatory Compliance Associates RCA	Indirect evidence	Pleasant Prairie, WI, United StatesHQ checked Sep 27, 2026	51-200	67 contacts →
	Indirect evidence “Regulatory Compliance Associates Inc.(RCA) is a team of experienced professionals from FDA-regulated industries including pharmaceutical, biologics and medical device.” Source: RevenueBase Database · checked Sep 27, 2026
10	BYE Aerospace, INC	Indirect evidence	Englewood, CO, United StatesHQ checked Sep 27, 2026	11-50	66 contacts →
	Indirect evidence “Innovation for the Next Generation of Aerospace" Bye Aerospace, Inc.” Source: RevenueBase Database · checked Sep 27, 2026
11	IQC	Indirect evidence	Dayton, United StatesHQ checked Sep 27, 2026	11-50	61 contacts →
	Indirect evidence “IQC, The ISO Standard Professionals.” Source: RevenueBase Database · checked Sep 27, 2026
12	TLG Aerospace	Indirect evidence	Seattle, WA, United StatesHQ checked Sep 27, 2026	51-200	57 contacts →
	Indirect evidence “TLG Aerospace, LLC (TLG) is an aerospace engineering services company dedicated to providing customers with reliable, efficient design, analysis, and certification for new and…” Source: RevenueBase Database · checked Sep 27, 2026
13	Core Business Solutions	Indirect evidence	Lewisburg, PA, United StatesHQ checked Sep 27, 2026	11-50	57 contacts →
	Indirect evidence “Core Business Solutions specializes in the needs of small businesses seeking ISO 9001 certification.” Source: RevenueBase Database · checked Sep 27, 2026
14	The Quality Firm	Indirect evidence	Signal Hill, CA, United StatesHQ checked Sep 27, 2026	51-200	53 contacts →
	Indirect evidence “The Quality Firm is made up of a team of Quality Managers, Project Engineers, Project Managers, Inspectors, and technicians with first-hand experience with large-scale…” Source: RevenueBase Database · checked Sep 27, 2026
15	Human Solutions Inc., A Division Of Oasis	Partial evidence	Washington, DC, United StatesHQ checked Sep 27, 2026	1,001-5,000	53 contacts →
	Partial evidence “Human Solutions Inc, a Division of Oasis Systems LLC, is a leading technical services company providing full life-cycle strategic consulting in systems engineering, enterprise…” Source: RevenueBase Database · checked Sep 27, 2026
16	SMT Corp	Indirect evidence	Sandy Hook, CT, United StatesHQ checked Sep 27, 2026	51-200	51 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 27, 2026
17	STS Engineering Solutions	Indirect evidence	Jensen Beach, FL, United StatesHQ checked Sep 27, 2026	11-50	51 contacts →
	Indirect evidence “From brilliant minds comes innovation, and this is where the STS Engineering Solutions team excels.” Source: RevenueBase Database · checked Sep 27, 2026
18	Alacriant, INC	Indirect evidence	Streetsboro, OH, United StatesHQ checked Sep 27, 2026	51-200	49 contacts →
	Indirect evidence “Alacriant Inc.” Source: RevenueBase Database · checked Sep 27, 2026
19	Quality Team 1	Indirect evidence	Highland Park, MI, United StatesHQ checked Sep 27, 2026	201-500	49 contacts →
	Indirect evidence “Quality Team 1 is an international ISO 9001-2008 registered service company specializing in inspection and containment with locations in the United States, Canada, and Mexico.” Source: RevenueBase Database · checked Sep 27, 2026
20	Axeon Corporation	Partial evidence	Draper, UT, United StatesHQ checked Sep 27, 2026	11-50	46 contacts →
	Partial evidence “The Axeon Difference Axeon Corporation is a customer-focused, practical and approachable, technically sound training and consulting firm.” Source: RevenueBase Database · checked Sep 27, 2026
21	Redstone Government Consulting, INC	Partial evidence	Huntsville, AL, United StatesHQ checked Sep 27, 2026	11-50	45 contacts →
	Partial evidence “Redstone Government Consulting is a team of the most senior industry veterans and the brightest new talent in the industry.” Source: RevenueBase Database · checked Sep 27, 2026
22	Medpoint, LLC	Indirect evidence	Greenville, SC, United StatesHQ checked Sep 27, 2026	11-50	45 contacts →
	Indirect evidence “Medpoint provides medical device, diagnostic, and biopharma clients with services actively supporting domestic and international quality assurance, regulatory affairs, clinical…” Source: RevenueBase Database · checked Sep 27, 2026
23	Neill Aircraft Company	Indirect evidence	Long Beach, CA, United StatesHQ checked Sep 27, 2026	201-500	43 contacts →
	Indirect evidence “Neill Aircraft Company (NAC) is a financially stable company, providing "Build-To-Print" Parts, Assemblies, & Kitting services to the Aerospace community.” Source: RevenueBase Database · checked Sep 27, 2026
24	Quality Auditing LLC	Partial evidence	Minneapolis, MN, United StatesHQ checked Sep 27, 2026	11-50	43 contacts →
	Partial evidence “Quality Auditing LLC is the industry leader in Quality Management System Auditing & Consulting for clients in highly-regulated industries, including Medical Device…” Source: RevenueBase Database · checked Sep 27, 2026
25	Validation Associates LLC	Indirect evidence	Herndon, VA, United StatesHQ checked Sep 27, 2026	51-200	43 contacts →
	Indirect evidence “Headquartered in Herndon, VA, Validation Associates LLC is a staffing and professional services firm led by a management team with over 25 years of industry experience.” 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: as9120 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 as9120 consulting firms.
Partial evidence: Its own public description names part of as9120 consulting firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name as9120 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 995 as9120 consulting firms based in the United States

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As9120 consulting firms based in the United States at a glance

As of Sep 27, 2026

26.5%Verified-email coverage

7.7Average contacts per company

1-10Median size (employees)

2.4%Largest-city concentration · Houston

Sep 27, 2026Page data refreshed

Companies by employee count

1-10

652

11-50

256

51-200

201-500

501-1,000

1,001-5,000

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 995 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 as9120 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 “as9120 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 as9120 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 as9120 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, 2,030 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.

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 as9120 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 as9120 consulting firms are there based in the United States?

RevenueBase identified 995 as9120 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?

PKL Services, headquartered in Poway, tops this list with the largest team on record.

Which city has the most as9120 consulting firms?

Houston leads with 24 headquartered companies, followed by Los Angeles (16) and San Diego (15).

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 2,030 verified decision-maker contacts tracked across these 995 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.