Company lists · Data refreshed November 2026

Top 19 Mechanical engineering contractors based in Seattle, United States

Name: Mechanical engineering contractors based in Seattle, United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Nov 6, 2026 77 companies tracked

RevenueBase identified 77 company matches for mechanical engineering contractors associated with Seattle, United States as of November 2026 and tracks 4,738 professional contacts across them, including 2,719 with verified work emails. Across the United States, Houston is the largest hub for this category (416 companies); Seattle has 77.

This list covers company matches for mechanical engineering contractors associated with Seattle, 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 November 6, 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 Nov 6, 2026 How this list was built

77Companies

4,738Contacts tracked

2,719Verified emails

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The 19 largest mechanical engineering contractors based in Seattle, United States

Ranked by team size

Top 19 of 77 company matches for mechanical engineering contractors based in Seattle, United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Nov 6, 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	Hargis Engineers	Exact match	Seattle, WA, United StatesHQ recorded Nov 6, 2026	201-500	196 contacts →
	Exact match “Hargis Engineers is a mechanical, electrical, telecommunications, security, energy consulting engineering, and commissioning firm.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
2	BHC Consultants	Exact match	Seattle, WA, United StatesHQ recorded Nov 6, 2026	51-200	110 contacts →
	Exact match “BHC Consultants, LLC (BHC) is an employee owned and managed consulting, engineering, building code and construction compliance, and planning firm with offices in Seattle and…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
3	Gray & Osborne	Exact match	Seattle, WA, United StatesHQ recorded Nov 6, 2026	51-200	105 contacts →
	Exact match “Municipal Engineering Services” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
4	Perteet INC	Exact match	Seattle, WA, United StatesHQ recorded Nov 6, 2026	51-200	98 contacts →
	Exact match “Perteet is now part of Ardurra, one of the nation’s most dynamic engineering firms.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
5	Coughlin Porter Lundeen	Exact match	Seattle, WA, United StatesHQ recorded Nov 6, 2026	51-200	94 contacts →
	Exact match “WHO WE ARE Coughlin Porter Lundeen is a civil and structural engineering firm founded in Seattle with offices in the Pacific and Inland Northwest.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
6	ABKJ	Exact match	Seattle, WA, United StatesHQ recorded Nov 6, 2026	11-50	69 contacts →
	Exact match “Andersen Bjornstad Kane Jacobs (ABKJ) is a premier consulting design firm in the United States.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
7	Floyd Snider	Exact match	Seattle, WA, United StatesHQ recorded Nov 6, 2026	11-50	53 contacts →
	Exact match “Floyd\|Snider is a multi-disciplinary environmental consulting firm providing engineering, strategic project management, and scientific expertise to achieve balanced solutions to…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
8	FSI Engineers	Exact match	Seattle, WA, United StatesHQ recorded Nov 6, 2026	11-50	47 contacts →
	Exact match “Founded in 1985, FSi Engineers provides a full range of MEP and fire protection engineering services clients from the Pacific Northwest to the Mid-Atlantic region.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
9	Delta E Consulting	Exact match	Seattle, WA, United StatesHQ recorded Nov 6, 2026	11-50	29 contacts →
	Exact match “At Delta E, we specialize in a diverse range of consulting services, including Sustainability, Carbon consulting, Energy services, and design expertise in Mechanical, Electrical…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
10	Malsam Tsang Structural Engineering	Exact match	Seattle, WA, United StatesHQ recorded Nov 6, 2026	11-50	27 contacts →
	Exact match “MALSAM TSANG STRUCTURAL ENGINEERING is a group of engineers and drafters known for our honesty, reliability and steadfast work ethic.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
11	WJA Design Collaborative	Exact match	Seattle, WA, United StatesHQ recorded Nov 6, 2026	11-50	25 contacts →
	Exact match “WJA Design Collaborative, established in 1968 as Whiteley Jacobsen Associates, has provided architectural and engineering services to Federal clients and private contractors…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
12	Quantum Consulting Engineers	Exact match	Seattle, WA, United StatesHQ recorded Nov 6, 2026	11-50	22 contacts →
	Exact match “Quantum Consulting Engineers offers structural engineering services for new and existing buildings, including new construction, tenant improvements, renovation, and historic…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
13	Modern Construction Services	Exact match	Seattle, WA, United StatesHQ recorded Nov 6, 2026	11-50	21 contacts →
	Exact match “Modern Construction Services, LLC is a Certified Women’s Business Enterprise (WBE) and Certified Small Contractor and Supplier (SCS) providing services for a broad range of…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
14	Integrated Design Engineers	Exact match	Seattle, WA, United StatesHQ recorded Nov 6, 2026	11-50	19 contacts →
	Exact match “Integrated Design Engineers (idE) is a Seattle-based structural engineering consulting firm founded in 2005.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
15	Pacific Engineering Technologies, INC	Exact match	Seattle, WA, United StatesHQ recorded Nov 6, 2026	11-50	19 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
16	Pensar	Exact match	Seattle, WA, United StatesHQ recorded Nov 6, 2026	51-200	19 contacts →
	Exact match “Pensar is a full service product development company offering Industrial Design, Electrical Engineering, Mechanical Engineering and Software Engineering.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
17	LPD Engineering Pllc	Exact match	Seattle, WA, United StatesHQ recorded Nov 6, 2026	11-50	18 contacts →
	Exact match “Improving our communities through economical, functional and sustainable civil design solutions.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
18	Semaphore Corporation	Exact match	Seattle, WA, United StatesHQ recorded Nov 6, 2026	11-50	15 contacts →
	Exact match “Our business was founded by a team of engineers interested in developing custom, elegant solutions to meet the business needs of our clients.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
19	Ergosync Engineering	Exact match	Seattle, WA, United StatesHQ recorded Nov 6, 2026	11-50	9 contacts →
	Exact match “Ergosync is a full-service electrical and systems engineering company offering design services, project management, construction support, and commissioning services.” Recorded in the RevenueBase company graph · Nov 6, 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 “mechanical engineering contractors”. 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 19 of 77 mechanical engineering contractors based in Seattle, United States

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Mechanical engineering contractors based in Seattle, United States at a glance

As of Nov 6, 2026

57.4%Verified-email coverage

61.5Average contacts per company

11-50Median size (employees)

Nov 6, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

1,001-5,000

Email recency for this list is measured across the whole United States list rather than for Seattle, so it is reported there. Company counts and contact totals on this page are exact for Seattle, over 77 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 Seattle, United States whose business descriptions match “mechanical engineering contractors” 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 2,719 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 November 6, 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.

Mechanical engineering contractors 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 “mechanical engineering contractors”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many mechanical engineering contractors are there based in Seattle, United States?

RevenueBase identified 77 company matches for mechanical engineering contractors associated with Seattle, United States as of November 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?

Hargis Engineers 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 mechanical engineering contractors?

Houston leads the United States with 416 company records, followed by New York (306) and Chicago (147). Seattle has 77.

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 2,719 professional contacts with verified work emails tracked across these 77 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 November 6, 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.