Company lists · Data refreshed September 2026

Top 24 Engineering consultancies based in Pasadena, United States

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

Compiled by the RevenueBase Data Team Data refreshed Sep 24, 2026 44 companies tracked

RevenueBase identified 44 company matches for engineering consultancies associated with Pasadena, United States as of September 2026 and tracks 13,577 professional contacts across them, including 5,640 with verified work emails. Across the United States, Houston is the largest hub for this category (622 companies); Pasadena has 44.

This list covers company matches for engineering consultancies associated with Pasadena, United States, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed September 24, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, 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 RevenueBase SmartSearch · Exact Recorded Sep 24, 2026 How this list was built

44Companies

13,577Contacts tracked

5,640Verified emails

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The 24 largest engineering consultancies based in Pasadena, United States

Ranked by team size

Top 24 of 44 company matches for engineering consultancies based in Pasadena, United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 24, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#	Company	RevenueBase SmartSearch	Headquarters	Employees	Contacts
1	Tetra Tech	Exact match	Pasadena, CA, United StatesHQ recorded Sep 24, 2026	10001+	12,999 contacts →
	Exact match “Tetra Tech is the leader in water, environment and sustainable infrastructure, providing high-end technical and engineering services for projects worldwide.” Recorded in the RevenueBase company graph · Sep 24, 2026 · View company records in RevenueBase
2	HSA & Associates, INC	Exact match	Pasadena, CA, United StatesHQ recorded Sep 24, 2026	51-200	75 contacts →
	Exact match “HSA & Associates provides structural engineering services to a myriad of partners in tilt-up construction and beyond.” Recorded in the RevenueBase company graph · Sep 24, 2026 · View company records in RevenueBase
3	Tier 1 Integrity	Exact match	Pasadena, TX, United StatesHQ recorded Sep 24, 2026	51-200	60 contacts →
	Exact match “Tier 1 Integrity LLC (T1 Integrity) is a multi-disciplinary engineering consulting; asset integrity management (AIM); technical inspection; traditional and advanced nondestructive…” Recorded in the RevenueBase company graph · Sep 24, 2026 · View company records in RevenueBase
4	Pacifica Services, INC	Exact match	Pasadena, CA, United StatesHQ recorded Sep 24, 2026	51-200	49 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Sep 24, 2026 · View company records in RevenueBase
5	Ramos Consulting Services, Inc. Ramos CS	Exact match	Pasadena, CA, United StatesHQ recorded Sep 24, 2026	51-200	48 contacts →
	Exact match “Founded in Los Angeles, CA, Ramos Consulting Services, Inc.(Ramos CS) is an engineering and program/construction management company focused on delivering quality infrastructure…” Recorded in the RevenueBase company graph · Sep 24, 2026 · View company records in RevenueBase
6	Pacrim Engineering	Exact match	Pasadena, CA, United StatesHQ recorded Sep 24, 2026	11-50	45 contacts →
	Exact match “PacRim Engineering is a leading engineering consulting firm that offers its clients exceptional, innovative, professional engineering consulting services.” Recorded in the RevenueBase company graph · Sep 24, 2026 · View company records in RevenueBase
7	SWA Architects Pasadena, CA	Exact match	Pasadena, CA, United StatesHQ recorded Sep 24, 2026	11-50	36 contacts →
	Exact match “SWA Architects (SWA), a certified Minority Business Enterprise (MBE) and Small Business Enterprise (SBE), was established in 1985 to provide architectural design, planning, and…” Recorded in the RevenueBase company graph · Sep 24, 2026 · View company records in RevenueBase
8	Fiedler Group	Exact match	Pasadena, CA, United StatesHQ recorded Sep 24, 2026	11-50	23 contacts →
	Exact match “Founded in 1957, Fiedler Group is widely considered the authority in innovative architectural, design, and engineering services.” Recorded in the RevenueBase company graph · Sep 24, 2026 · View company records in RevenueBase
9	AIX Group	Exact match	Pasadena, CA, United StatesHQ recorded Sep 24, 2026	1-10	21 contacts →
	Exact match “Results-oriented, talented and innovative professionals that provide client focused, sustainable and equitable engineering and construction management services” Recorded in the RevenueBase company graph · Sep 24, 2026 · View company records in RevenueBase
10	ZT Consulting Group, INC	Exact match	Pasadena, CA, United StatesHQ recorded Sep 24, 2026	11-50	19 contacts →
	Exact match “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…” Recorded in the RevenueBase company graph · Sep 24, 2026 · View company records in RevenueBase
11	MA Engineering	Exact match	Pasadena, CA, United StatesHQ recorded Sep 24, 2026	11-50	16 contacts →
	Exact match “MA Engineering is a Civil Engineering firm based in Pasadena, California, with a staff of 24 designers and engineers.” Recorded in the RevenueBase company graph · Sep 24, 2026 · View company records in RevenueBase
12	J. Morales Civil Engineering	Exact match	Pasadena, TX, United StatesHQ recorded Sep 24, 2026	11-50	14 contacts →
	Exact match “We are a one-stop civil engineering firm serving the Houston area.” Recorded in the RevenueBase company graph · Sep 24, 2026 · View company records in RevenueBase
13	Adams Environmental Engineering Group, LLC	Exact match	Pasadena, MD, United StatesHQ recorded Sep 24, 2026	1-10	8 contacts →
	Exact match “AEEG, LLC was formed in 2018 to service the Baltimore-Washington Metro area by combining technical experience and skilled workmanship, resulting in accurate work plan…” Recorded in the RevenueBase company graph · Sep 24, 2026 · View company records in RevenueBase
14	Southland Civil Engineering & Survey, LLP	Exact match	Pasadena, CA, United StatesHQ recorded Sep 24, 2026	11-50	8 contacts →
	Exact match “At Southland Civil Engineering & Survey, LLP (SCE & S), we are driven by the principles of service, land development trends, sustainability, and community development.” Recorded in the RevenueBase company graph · Sep 24, 2026 · View company records in RevenueBase
15	Hariton Engineering INC	Exact match	Pasadena, CA, United StatesHQ recorded Sep 24, 2026	1-10	6 contacts →
	Exact match “Sustainability: When it comes to caring for our environment, one of the primary concerns is how we treat and sustain it.” Recorded in the RevenueBase company graph · Sep 24, 2026 · View company records in RevenueBase
16	Peck Architecture Structural Civil	Exact match	Pasadena, CA, United StatesHQ recorded Sep 24, 2026	11-50	6 contacts →
	Exact match “At PECK we provide architecture & engineering design solutions for residential and commercial clients in Southern California / Los Angeles, We believe in producing solutions that…” Recorded in the RevenueBase company graph · Sep 24, 2026 · View company records in RevenueBase
17	DHA Calpec	Exact match	Pasadena, CA, United StatesHQ recorded Sep 24, 2026	11-50	5 contacts →
	Exact match “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.” Recorded in the RevenueBase company graph · Sep 24, 2026 · View company records in RevenueBase
18	Irvine Geotechnical, INC	Exact match	Pasadena, CA, United StatesHQ recorded Sep 24, 2026	1-10	4 contacts →
	Exact match “We provide consulting services in geotechnical engineering and engineering geology.” Recorded in the RevenueBase company graph · Sep 24, 2026 · View company records in RevenueBase
19	JCE Structural Engineering Group	Exact match	Pasadena, CA, United StatesHQ recorded Sep 24, 2026	11-50	4 contacts →
	Exact match “JCE Structural Engineering Group, Inc.” Recorded in the RevenueBase company graph · Sep 24, 2026 · View company records in RevenueBase
20	Larsen Zienkiewicz, INC	Exact match	Pasadena, CA, United StatesHQ recorded Sep 24, 2026	1-10	3 contacts →
	Exact match “Engineers and expert advisors on building enclosures and waterproofing systems in the construction industry.” Recorded in the RevenueBase company graph · Sep 24, 2026 · View company records in RevenueBase
21	Engineous Group, INC	Exact match	Pasadena, CA, United StatesHQ recorded Sep 24, 2026	11-50	3 contacts →
	Exact match “Engineous Group Inc.” Recorded in the RevenueBase company graph · Sep 24, 2026 · View company records in RevenueBase
22	Ibarra Structural Engineering	Exact match	Pasadena, CA, United StatesHQ recorded Sep 24, 2026	1-10	2 contacts →
	Exact match “ibarra Structural Engineering specializes in serving architects in residential and commercial construction projects in the greater Los Angeles area.” Recorded in the RevenueBase company graph · Sep 24, 2026 · View company records in RevenueBase
23	XIA Structural Engineers, INC	Exact match	Pasadena, CA, United StatesHQ recorded Sep 24, 2026	1-10	2 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Sep 24, 2026 · View company records in RevenueBase
24	Wyatt Engineering	Exact match	Pasadena, CA, United StatesHQ recorded Sep 24, 2026	1-10	1 contacts →
	Exact match “Wyatt Engineering is a structural and architectural engineering firm based in Pasadena, California and Oakland, California.” Recorded in the RevenueBase company graph · Sep 24, 2026 · View company records in RevenueBase

RevenueBase SmartSearch

Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.

This list uses Exact for “engineering consultancies”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.

Showing 24 of 44 engineering consultancies based in Pasadena, United States

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Engineering consultancies based in Pasadena, United States at a glance

As of Sep 24, 2026

41.5%Verified-email coverage

308.6Average contacts per company

11-50Median size (employees)

Sep 24, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

10001+

Email recency for this list is measured across the whole United States list rather than for Pasadena, so it is reported there. Company counts and contact totals on this page are exact for Pasadena, over 44 companies.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
What qualifies: Company records associated with Pasadena, United States whose business descriptions match “engineering consultancies” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch: Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview: The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality: RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
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 displayed company carries at least one verified work email. RevenueBase tracks 5,640 professional contacts with verified work emails across the full matched dataset. 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 24, 2026. Lists refresh periodically as the graph is re-checked.
Record context: Company records and descriptions can change. Check the company's website for its current services and locations.

Engineering consultancies by metro in the United States

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “engineering consultancies”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many engineering consultancies are there based in Pasadena, United States?

RevenueBase identified 44 company matches for engineering consultancies associated with Pasadena, United States as of September 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

Tetra Tech tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city in the United States has the most engineering consultancies?

Houston leads the United States with 622 company records, followed by New York (449) and Austin (208). Pasadena has 44.

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 5,640 professional contacts with verified work emails tracked across these 44 companies; direct dials are available where recorded.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 24, 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 SmartSearch, 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.