Company lists · Data refreshed September 2026

Top 25 Engineering companies based in Pasadena, United States

Name: Engineering companies based in Pasadena, United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 6, 2026 55 companies tracked

This directory lists 55 engineering companies based in Pasadena, United States, with 14,423 contacts and 5,841 email addresses. The list includes companies across engineering disciplines, and Houston is the single most-represented city among the companies on the list. Use it to identify potential suppliers, partners, and sales prospects as of September 2026.

Engineering companies apply scientific, mathematical, and technical principles to design, develop, test, and manage products, systems, structures, or industrial processes. This list covers companies that provide engineering design, consulting, testing, project management, or related technical services. Ranked by team size, largest first. Data current as of September 6, 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 6, 2026 86% judged on-target in blind review

55Companies

14,423Contacts tracked

5,841Verified emails

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The 25 largest engineering companies based in Pasadena, United States

Ranked by team size

Top 25 of 55 engineering companies based in Pasadena, United States, ranked by team size, largest first. Data refreshed Sep 6, 2026. RevenueBase Smart Search rates how each company's information relates to engineering 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	Tetra Tech	Strong evidence	Pasadena, CA, United StatesHQ checked Sep 6, 2026	10001+	12,999 contacts →
	“Tetra Tech is the leader in water, environment and sustainable infrastructure, providing high-end technical and engineering services for projects worldwide.” Source: company website · checked Sep 6, 2026
2	APM	Indirect evidence	Pasadena, TX, United StatesHQ checked Sep 6, 2026	5,001-10,000	215 contacts →
	“Empowering the People Who Power Life Safety \| Quality \| Integrity APM has your construction and maintenance solutions.” Source: company website · checked Sep 6, 2026
3	Meitec INC	Indirect evidence	Pasadena, TX, United StatesHQ checked Sep 6, 2026	201-500	205 contacts →
	“For more than 30 years, MEITEC has delivered high quality electrical and instrumentation construction services across a broad range of energy markets-including drilling, pipeline…” Source: company website · checked Sep 6, 2026
4	TIMEC	Indirect evidence	Pasadena, TX, United StatesHQ checked Sep 6, 2026	501-1,000	198 contacts →
	“TIMEC, founded in 1971, has over 50 years of experience delivering best-in-class safety, quality, and efficiency.” Source: company website · checked Sep 6, 2026
5	HSA & Associates, INC	Strong evidence	Pasadena, CA, United StatesHQ checked Sep 6, 2026	51-200	75 contacts →
	“HSA & Associates provides structural engineering services to a myriad of partners in tilt-up construction and beyond.” Source: company website · checked Sep 6, 2026
6	Tier 1 Integrity	Strong evidence	Pasadena, TX, United StatesHQ checked Sep 6, 2026	51-200	60 contacts →
	“Tier 1 Integrity LLC (T1 Integrity) is a multi-disciplinary engineering consulting; asset integrity management (AIM); technical inspection; traditional and advanced nondestructive…” Source: company website · checked Sep 6, 2026
7	Pacifica Services, INC	Indirect evidence	Pasadena, CA, United StatesHQ checked Sep 6, 2026	51-200	49 contacts →
	Source: company website · checked Sep 6, 2026
8	Ramos Consulting Services, Inc. Ramos CS	Strong evidence	Pasadena, CA, United StatesHQ checked Sep 6, 2026	51-200	48 contacts →
	“Founded in Los Angeles, CA, Ramos Consulting Services, Inc.(Ramos CS) is an engineering and program/construction management company focused on delivering quality infrastructure…” Source: company website · checked Sep 6, 2026
9	Pacrim Engineering	Strong evidence	Pasadena, CA, United StatesHQ checked Sep 6, 2026	11-50	45 contacts →
	“PacRim Engineering is a leading engineering consulting firm that offers its clients exceptional, innovative, professional engineering consulting services.” Source: company website · checked Sep 6, 2026
10	Spike Electric	Strong evidence	Pasadena, TX, United StatesHQ checked Sep 6, 2026	501-1,000	42 contacts →
	“Spike Electric Controls is a U.S-based electrical engineering and manufacturing company specializing in medium-voltage switchgear, gas-insulated switchgear (GIS), medium-voltage…” Source: company website · checked Sep 6, 2026
11	SWA Architects Pasadena, CA	Indirect evidence	Pasadena, CA, United StatesHQ checked Sep 6, 2026	11-50	36 contacts →
	“SWA Architects (SWA), a certified Minority Business Enterprise (MBE) and Small Business Enterprise (SBE), was established in 1985 to provide architectural design, planning, and…” Source: company website · checked Sep 6, 2026
12	Instrumentation & Electrical Specialist LLC	Indirect evidence	Pasadena, TX, United StatesHQ checked Sep 6, 2026	201-500	34 contacts →
	“Instrumentation & Electrical Specialist (IES) is a full-service I&E contractor serving the nation’s energy, chemical and heavy process industries for over 18 years.” Source: company website · checked Sep 6, 2026
13	Fiedler Group	Strong evidence	Pasadena, CA, United StatesHQ checked Sep 6, 2026	11-50	23 contacts →
	“Founded in 1957, Fiedler Group is widely considered the authority in innovative architectural, design, and engineering services.” Source: company website · checked Sep 6, 2026
14	AIX Group	Strong evidence	Pasadena, CA, United StatesHQ checked Sep 6, 2026	1-10	21 contacts →
	“Results-oriented, talented and innovative professionals that provide client focused, sustainable and equitable engineering and construction management services” Source: company website · checked Sep 6, 2026
15	ZT Consulting Group, INC	Strong evidence	Pasadena, CA, United StatesHQ checked Sep 6, 2026	11-50	19 contacts →
	“ZT Consulting Group, Inc.(ZTC) is a consulting engineering company that is specialized in Source Inspection (QA/QV/IQA), Forensic Engineering, and Structural Health Monitoring…” Source: company website · checked Sep 6, 2026
16	Emerald Standard Services, INC	Indirect evidence	Pasadena, TX, United StatesHQ checked Sep 6, 2026	51-200	18 contacts →
	“Electrical Contractors & Engineers We are full service electrical contractors and engineers focused on serving all your electrical design and installation needs.” Source: company website · checked Sep 6, 2026
17	MA Engineering	Strong evidence	Pasadena, CA, United StatesHQ checked Sep 6, 2026	11-50	16 contacts →
	“MA Engineering is a Civil Engineering firm based in Pasadena, California, with a staff of 24 designers and engineers.” Source: company website · checked Sep 6, 2026
18	J. Morales Civil Engineering	Strong evidence	Pasadena, TX, United StatesHQ checked Sep 6, 2026	11-50	14 contacts →
	“We are a one-stop civil engineering firm serving the Houston area.” Source: company website · checked Sep 6, 2026
19	Southland Civil Engineering & Survey, LLP	Strong evidence	Pasadena, CA, United StatesHQ checked Sep 6, 2026	11-50	8 contacts →
	“At Southland Civil Engineering & Survey, LLP (SCE & S), we are driven by the principles of service, land development trends, sustainability, and community development.” Source: company website · checked Sep 6, 2026
20	Hariton Engineering INC	Indirect evidence	Pasadena, CA, United StatesHQ checked Sep 6, 2026	1-10	6 contacts →
	“Sustainability: When it comes to caring for our environment, one of the primary concerns is how we treat and sustain it.” Source: company website · checked Sep 6, 2026
21	Peck Architecture Structural Civil	Strong evidence	Pasadena, CA, United StatesHQ checked Sep 6, 2026	11-50	6 contacts →
	“At PECK we provide architecture & engineering design solutions for residential and commercial clients in Southern California / Los Angeles, We believe in producing solutions that…” Source: company website · checked Sep 6, 2026
22	H M Industrial EPC	Indirect evidence	Pasadena, TX, United StatesHQ checked Sep 6, 2026	201-500	5 contacts →
	“H+M Industrial EPC has been providing project services to various industries along the Gulf Coast for 35+ years.” Source: company website · checked Sep 6, 2026
23	DHA Calpec	Strong evidence	Pasadena, CA, United StatesHQ checked Sep 6, 2026	11-50	5 contacts →
	“d’Autremont-Helms & Associates, Inc.(dHA) was founded in 1949 as an engineering firm offering expertise in the area of Mechanical and Plumbing consulting engineering services.” Source: company website · checked Sep 6, 2026
24	Irvine Geotechnical, INC	Strong evidence	Pasadena, CA, United StatesHQ checked Sep 6, 2026	1-10	4 contacts →
	“We provide consulting services in geotechnical engineering and engineering geology.” Source: company website · checked Sep 6, 2026
25	JCE Structural Engineering Group	Strong evidence	Pasadena, CA, United StatesHQ checked Sep 6, 2026	11-50	4 contacts →
	“JCE Structural Engineering Group, Inc.” Source: company website · checked Sep 6, 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 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 engineering companies.
Partial evidence: Its own public description names part of engineering companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name engineering 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 55 engineering companies based in Pasadena, United States

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Engineering companies based in Pasadena, United States at a glance

As of Sep 6, 2026

40.5%Verified-email coverage

262.2Average contacts per company

11-50Median size (employees)

1318.2%Largest-city concentration · Houston

Sep 6, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

5,001-10,000

10001+

Email recency for this list is measured across the whole United States list rather than this city, so it is reported there. Company counts and contact totals on this page are exact for Pasadena, over 55 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 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 Pasadena, United States whose own description of what they do matches “engineering 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 engineering 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 engineering companies, and records with no verified work email. Companies headquartered outside Pasadena 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, 5,841 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 6, 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 companies by metro in the United States

Frequently asked

How many engineering companies are based in Pasadena, United States?

The directory lists 55 engineering companies based in Pasadena, United States as of September 2026.

What services do engineering companies provide?

Engineering companies provide services such as design, consulting, testing, project management, and technical support across disciplines and industries.

How can I find contacts at engineering companies?

This directory includes 14,423 contacts and 5,841 email addresses associated with engineering companies.

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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.