Company lists · Data refreshed September 2026

Top 24 Infrastructure consulting firms based in Seattle, United States

Name: Infrastructure consulting firms based in Seattle, United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 3, 2026 93 companies tracked

RevenueBase identified 93 infrastructure consulting firms headquartered in Seattle, United States as of September 2026 and tracks 3,256 professional contacts across them, including 2,044 with verified work emails. New York is the largest hub.

This list covers infrastructure consulting firms headquartered in Seattle, 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, how directly it supports the match, and when it was last checked. Data refreshed September 3, 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 HQ checked on every row Match evidence on every row Refreshed Sep 3, 2026 86% judged on-target in blind review

93Companies

3,256Contacts tracked

2,044Verified emails

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The 24 largest infrastructure consulting firms based in Seattle, United States

Ranked by team size

Top 24 of 93 infrastructure consulting firms based in Seattle, United States, ranked by team size, largest first. Data refreshed Sep 3, 2026. Evidence rates how directly each company's own description names infrastructure consulting firms: strong (names it), partial (names part of it), indirect (matched on its full profile rather than the summary shown). Click a count to unlock that company's people.
#	Company	Headquarters	Employees	Contacts
1	Coffman EngineersIndirect evidence	Seattle, WA, United StatesHQ checked Sep 3, 2026	501-1,000	845
	“The right team is more than an advantage.” Source: company website · checked Sep 3, 2026
2	Hargis EngineersPartial evidence	Seattle, WA, United StatesHQ checked Sep 3, 2026	201-500	188
	“Hargis Engineers is a mechanical, electrical, telecommunications, security, energy consulting engineering, and commissioning firm.” Source: company website · checked Sep 3, 2026
3	Magnusson Klemencic AssociatesIndirect evidence	Seattle, WA, United StatesHQ checked Sep 3, 2026	51-200	187
	“We engineer the future of the built environment, one structure, skyline, and community at a time.” Source: company website · checked Sep 3, 2026
4	Perteet INCIndirect evidence	Seattle, WA, United StatesHQ checked Sep 3, 2026	51-200	125
	Source: company website · checked Sep 3, 2026
5	BHC ConsultantsPartial evidence	Seattle, WA, United StatesHQ checked Sep 3, 2026	51-200	109
	“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…” Source: company website · checked Sep 3, 2026
6	Gray & OsborneIndirect evidence	Seattle, WA, United StatesHQ checked Sep 3, 2026	51-200	100
	“Municipal Engineering Services” Source: company website · checked Sep 3, 2026
7	R.W. BeckIndirect evidence	Seattle, WA, United StatesHQ checked Sep 3, 2026	501-1,000	84
	“R.” Source: company website · checked Sep 3, 2026
8	Berk Consulting, INCIndirect evidence	Seattle, WA, United StatesHQ checked Sep 3, 2026	11-50	67
	“BERK is an interdisciplinary consultancy integrating strategy, planning, and policy development; financial and economic analysis; and facilitation, design, and communications.” Source: company website · checked Sep 3, 2026
9	KPGIndirect evidence	Seattle, WA, United StatesHQ checked Sep 3, 2026	51-200	67
	“KPG was initially formed in 1990 by a team of engineers, architects, landscape architects, and urban designers committed to and focused on community-driven public projects.” Source: company website · checked Sep 3, 2026
10	ABKJPartial evidence	Seattle, WA, United StatesHQ checked Sep 3, 2026	11-50	65
	“Andersen Bjornstad Kane Jacobs (ABKJ) is a premier consulting design firm in the United States.” Source: company website · checked Sep 3, 2026
11	Floyd SniderPartial evidence	Seattle, WA, United StatesHQ checked Sep 3, 2026	11-50	51
	“Floyd\|Snider is a multi-disciplinary environmental consulting firm providing engineering, strategic project management, and scientific expertise to achieve balanced solutions to…” Source: company website · checked Sep 3, 2026
12	Delta E ConsultingPartial evidence	Seattle, WA, United StatesHQ checked Sep 3, 2026	11-50	20
	“At Delta E, we specialize in a diverse range of consulting services, including Sustainability, Carbon consulting, Energy services, and design expertise in Mechanical, Electrical…” Source: company website · checked Sep 3, 2026
13	PaclandPartial evidence	Seattle, WA, United StatesHQ checked Sep 3, 2026	1-10	20
	“Founded in 1994, PACLAND is recognized as a leading site development consulting/engineering firm based in Seattle and serving the western US.” Source: company website · checked Sep 3, 2026
14	LPD Engineering PllcIndirect evidence	Seattle, WA, United StatesHQ checked Sep 3, 2026	11-50	19
	“Improving our communities through economical, functional and sustainable civil design solutions.” Source: company website · checked Sep 3, 2026
15	Integrated Design EngineersPartial evidence	Seattle, WA, United StatesHQ checked Sep 3, 2026	11-50	16
	“Integrated Design Engineers (idE) is a Seattle-based structural engineering consulting firm founded in 2005.” Source: company website · checked Sep 3, 2026
16	Rapid Alpha, INCIndirect evidence	Seattle, WA, United StatesHQ checked Sep 3, 2026	11-50	13
	“Build systems that drive growth now-and set the stage for $250M in annual revenue.” Source: company website · checked Sep 3, 2026
17	HainlineIndirect evidence	Seattle, WA, United StatesHQ checked Sep 3, 2026	11-50	11
	“HAINLINE was founded in 1981 to assist owners, architects, and contractors in the construction process.” Source: company website · checked Sep 3, 2026
18	Latitude 48 EngineersIndirect evidence	Seattle, WA, United StatesHQ checked Sep 3, 2026	1-10	8
	“OUR FIRM We're a Seattle based Civil Engineering Firm focused on superior service accompanied with cutting edge analysis and design capabilities.” Source: company website · checked Sep 3, 2026
19	Elite Precision ConsultingPartial evidence	Seattle, WA, United StatesHQ checked Sep 3, 2026	51-200	8
	“Trusted by executives and investors worldwide, Elite Precision Consulting brings business serenity to global growth.” Source: company website · checked Sep 3, 2026
20	Tfwb Engineers INCPartial evidence	Seattle, WA, United StatesHQ checked Sep 3, 2026	11-50	7
	“TFWB Engineers formerly Travis, Fitzmaurice & Associates is an electrical, telecommunications, and security design consulting firm.” Source: company website · checked Sep 3, 2026
21	Meng AnalysisIndirect evidence	Seattle, WA, United StatesHQ checked Sep 3, 2026	11-50	7
	“At MENG Analysis we are passionate about improving quality of life through optimization of the built environment.” Source: company website · checked Sep 3, 2026
22	Green Earth Operations, INCIndirect evidence	Seattle, WA, United StatesHQ checked Sep 3, 2026	11-50	7
	“Green Earth Operations is an environmental science and engineering firm providing objective analysis and environmentally responsible solutions to meet the needs of our clients.” Source: company website · checked Sep 3, 2026
23	Ergosync EngineeringIndirect evidence	Seattle, WA, United StatesHQ checked Sep 3, 2026	11-50	6
	“Ergosync is a full-service electrical and systems engineering company offering design services, project management, construction support, and commissioning services.” Source: company website · checked Sep 3, 2026
24	Quantavalue, LLCIndirect evidence	Seattle, United StatesHQ checked Sep 3, 2026	11-50	6
	“Innovation is in our DNA.” Source: company website · checked Sep 3, 2026

Showing 24 of 93 infrastructure consulting firms based in Seattle, United States

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Infrastructure consulting firms based in Seattle, United States at a glance

As of Sep 3, 2026

1-10Median size (employees)

New YorkLargest hub · 306 HQs

Contacts with mobile numbers

Sep 3, 2026Data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

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 Seattle, over 93 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 infrastructure consulting firms, so some rows will be adjacent to the category rather than pure plays. The description and evidence 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 SmartSearch, the natural-language company search available to every RevenueBase user.
What qualifies: Companies headquartered in Seattle, United States whose own description of what they do matches “infrastructure consulting firms”. Matching reads each company's description, not its industry code or its name.
What we exclude: Companies whose own description does not clearly place them among infrastructure consulting firms, and records with no verified work email. Companies headquartered outside Seattle 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 an evidence 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, 2,044 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 3, 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.

Infrastructure consulting firms by metro in the United States

Frequently asked

How many infrastructure consulting firms are there based in Seattle, United States?

RevenueBase identified 93 infrastructure consulting firms headquartered in Seattle, 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?

Coffman Engineers, headquartered in Seattle, tops this list with the largest team on record.

Which city has the most infrastructure consulting firms?

New York leads with 306 headquartered companies, followed by Houston (293) and Washington (158).

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 2,044 verified decision-maker contacts tracked across these 93 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 3, 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.