Company lists · Data refreshed October 2026

Top 14 Energy systems engineering services based in Seattle, United States

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

Compiled by the RevenueBase Data Team Data refreshed Oct 25, 2026 26 companies tracked

RevenueBase identified 26 company matches for energy systems engineering services associated with Seattle, United States as of October 2026 and tracks 899 professional contacts across them, including 515 with verified work emails. Across the United States, Houston is the largest hub for this category (249 companies); Seattle has 26.

This list covers company matches for energy systems engineering services 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 October 25, 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 Oct 25, 2026 How this list was built

26Companies

899Contacts tracked

515Verified emails

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The 14 largest energy systems engineering services based in Seattle, United States

Ranked by team size

Top 14 of 26 company matches for energy systems engineering services based in Seattle, United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Oct 25, 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 Oct 25, 2026	201-500	192 contacts →
	Exact match “Hargis Engineers is a mechanical, electrical, telecommunications, security, energy consulting engineering, and commissioning firm.” Recorded in the RevenueBase company graph · Oct 25, 2026 · View company records in RevenueBase
2	Utilicast	Exact match	Seattle, WA, United StatesHQ recorded Oct 25, 2026	201-500	189 contacts →
	Exact match “Utilicast is more than just a consulting company.” Recorded in the RevenueBase company graph · Oct 25, 2026 · View company records in RevenueBase
3	Harris Group	Exact match	Seattle, WA, United StatesHQ recorded Oct 25, 2026	51-200	189 contacts →
	Exact match “Harris Group is a multidiscipline engineering consulting firm with offices located throughout the United States.” Recorded in the RevenueBase company graph · Oct 25, 2026 · View company records in RevenueBase
4	Säzän Group INC	Exact match	Seattle, WA, United StatesHQ recorded Oct 25, 2026	51-200	158 contacts →
	Exact match “Säzän Group is an engineering and consulting firm with offices in Washington, Oregon, and Arizona.” Recorded in the RevenueBase company graph · Oct 25, 2026 · View company records in RevenueBase
5	Ecotope, INC	Exact match	Seattle, WA, United StatesHQ recorded Oct 25, 2026	11-50	28 contacts →
	Exact match “Ecotope has provided sustainable building design consulting and engineering services in the Pacific Northwest for over 40 years.” Recorded in the RevenueBase company graph · Oct 25, 2026 · View company records in RevenueBase
6	Delta E Consulting	Exact match	Seattle, WA, United StatesHQ recorded Oct 25, 2026	11-50	27 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 · Oct 25, 2026 · View company records in RevenueBase
7	Ergosync Engineering	Exact match	Seattle, WA, United StatesHQ recorded Oct 25, 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 · Oct 25, 2026 · View company records in RevenueBase
8	Aneden Consulting INC	Exact match	Seattle, WA, United StatesHQ recorded Oct 25, 2026	1-10	6 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Oct 25, 2026 · View company records in RevenueBase
9	CES Consulting LLC	Exact match	Seattle, WA, United StatesHQ recorded Oct 25, 2026	1-10	4 contacts →
	Exact match “We are a team of experienced electrical engineers and consultants, who provide strategic planning and advocacy for our clients around the globe.” Recorded in the RevenueBase company graph · Oct 25, 2026 · View company records in RevenueBase
10	Globality Consultancy LLC	Exact match	Seattle, WA, United StatesHQ recorded Oct 25, 2026	1-10	3 contacts →
	Exact match “Globality Consultancy is an independent advisory and management consultancy firm, supporting Owners, Operators and Executives with their Facilities Management and Energy business…” Recorded in the RevenueBase company graph · Oct 25, 2026 · View company records in RevenueBase
11	BG Power Advisors	Exact match	Seattle, WA, United StatesHQ recorded Oct 25, 2026	1-10	2 contacts →
	Exact match “At BG Power Advisors, we are committed to connecting the best engineers with the leading firms in clean energy.” Recorded in the RevenueBase company graph · Oct 25, 2026 · View company records in RevenueBase
12	FAC Systems INC	Exact match	Seattle, WA, United StatesHQ recorded Oct 25, 2026	1-10	1 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Oct 25, 2026 · View company records in RevenueBase
13	Balance Architects Pllc	Exact match	Seattle, WA, United StatesHQ recorded Oct 25, 2026	1-10	1 contacts →
	Exact match “Balance Architects is a full service firm offering architectural and energy consulting services.” Recorded in the RevenueBase company graph · Oct 25, 2026 · View company records in RevenueBase
14	Sweek Consulting Engineers	Exact match	Seattle, WA, United StatesHQ recorded Oct 25, 2026	1-10	1 contacts →
	Exact match “Sweek Consulting Engineers, LLC is a Seattle-based consulting firm specializing in energy efficiency engineering consulting services within the construction industry.” Recorded in the RevenueBase company graph · Oct 25, 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 “energy systems engineering services”. 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 14 of 26 energy systems engineering services based in Seattle, United States

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Energy systems engineering services based in Seattle, United States at a glance

As of Oct 25, 2026

57.3%Verified-email coverage

34.6Average contacts per company

1-10Median size (employees)

Oct 25, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

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 26 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 “energy systems engineering services” 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 515 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 October 25, 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.

Energy systems engineering services 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 “energy systems engineering services”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many energy systems engineering services are there based in Seattle, United States?

RevenueBase identified 26 company matches for energy systems engineering services associated with Seattle, United States as of October 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 energy systems engineering services?

Houston leads the United States with 249 company records, followed by New York (120) and Austin (65). Seattle has 26.

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 515 professional contacts with verified work emails tracked across these 26 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 October 25, 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.