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Company lists · Data refreshed September 2026

Top 25 Renewable energy consulting firms based in Washington, United States

Compiled by the RevenueBase Data Team Data refreshed Sep 5, 2026 58 companies tracked

RevenueBase identified 58 renewable energy consulting firms headquartered in Washington, United States as of September 2026 and tracks 968 professional contacts across them, including 558 with verified work emails. Houston is the largest hub.

This list covers renewable energy consulting firms headquartered in Washington, 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 5, 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 5, 2026 86% judged on-target in blind review
58Companies
968Contacts tracked
558Verified emails
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The 25 largest renewable energy consulting firms based in Washington, United States

Ranked by team size
Top 25 of 58 renewable energy consulting firms based in Washington, United States, ranked by team size, largest first. Data refreshed Sep 5, 2026. Evidence rates how directly each company's own description names renewable energy 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.
#CompanyHeadquartersEmployeesContacts
1
Synergy Consulting, INCPartial evidence
Washington, DC, United StatesHQ checked Sep 5, 202651-200434

“Synergy Consulting is Global Leader in Financial and Corporate Advisory.”

Source: company website · checked Sep 5, 2026
2
SOL SystemsPartial evidence
Washington, DC, United StatesHQ checked Sep 5, 202651-200189

“Sol Systems is a national clean energy firm focused on building domestic energy that benefits local communities.”

Source: company website · checked Sep 5, 2026
3
Baumann ConsultingPartial evidence
Washington, DC, United StatesHQ checked Sep 5, 202651-20063

“Baumann Consulting is driven to deliver solutions for a carbon-neutral real estate industry.”

Source: company website · checked Sep 5, 2026
4
NEW Columbia SolarPartial evidence
Washington, DC, United StatesHQ checked Sep 5, 202651-20041

“New Columbia Solar (NCS) is a full-service solar energy company, based in and serving the District of Columbia.”

Source: company website · checked Sep 5, 2026
5
North Arrow, INCIndirect evidence
Washington, DC, United StatesHQ checked Sep 5, 202611-5022

“DUNS Number: 08-001-8268 CAGE Code: 7GN69 SBA Certified Small Business District of Columbia Certified Business Enterprise (CBE) Metropolitan Washington Airports Authority Local…”

Source: company website · checked Sep 5, 2026
6
Amis Patel BrewerStrong evidence
Washington, DC, United StatesHQ checked Sep 5, 20261-1018

“Amis, Patel & Brewer, LLP is a boutique law firm focused on providing legal services to the renewable energy and sustainability sectors.”

Source: company website · checked Sep 5, 2026
7
Grid Strategies LLCStrong evidence
Washington, DC, United StatesHQ checked Sep 5, 202611-5017

“Grid Strategies LLC is a power sector consulting firm helping clients understand the opportunities and barriers to integrating clean energy into the electric grid.”

Source: company website · checked Sep 5, 2026
8
Numark Associates, INCIndirect evidence
Washington, DC, United StatesHQ checked Sep 5, 202611-5015
Source: company website · checked Sep 5, 2026
9
Sustainable YOUPartial evidence
Washington, DC, United StatesHQ checked Sep 5, 202651-20014

“Sustainable You is a national strategic consulting firm in solar and sustainability serving residential and small commercial clients with a focus in the DC, Maryland and Virginia…”

Source: company website · checked Sep 5, 2026
10
Sustainable Strategies DCPartial evidence
Washington, DC, United StatesHQ checked Sep 5, 20261-1011

“Sustainable Strategies DC is a government affairs and strategic consulting firm based in Washington, DC, that helps clients secure resources for community revitalization and tools…”

Source: company website · checked Sep 5, 2026
11
Distributed SUNStrong evidence
Washington, DC, United StatesHQ checked Sep 5, 202611-5011

“Distributed Sun LLC (DSUN) is a renewable energy services provider founded in 2009.”

Source: company website · checked Sep 5, 2026
12
S2 StrategiesPartial evidence
Washington, DC, United StatesHQ checked Sep 5, 202611-5011

“S2 Strategies is an energy advisory firm founded in 2023 by Sam Ricketts and Shara Mohtadi.”

Source: company website · checked Sep 5, 2026
13
Green Strategies, INCIndirect evidence
Washington, DC, United StatesHQ checked Sep 5, 20261-108

“Green Strategies Inc.”

Source: company website · checked Sep 5, 2026
14
Green CapitolPartial evidence
Washington, United StatesHQ checked Sep 5, 20261-107

“Green Capitol LLC works on sustainable development policy at the state, federal and international levels, serving clients on agriculture, energy and environment concerns via…”

Source: company website · checked Sep 5, 2026
15
Energy Shrink, LLCStrong evidence
Washington, DC, United StatesHQ checked Sep 5, 20261-106

“Energy Shrink is an environmental consulting practice specialized in sustainability and energy efficiency in buildings, that is, high-performance or green buildings.”

Source: company website · checked Sep 5, 2026
16
Amala Clean Energy AdvisorsPartial evidence
Washington, DC, United StatesHQ checked Sep 5, 202611-506

“AMALA Clean Energy Advisors includes a core group of high-caliber multi-disciplinary global experts with extensive experience and proven track records developing clean energy…”

Source: company website · checked Sep 5, 2026
17
Oasis Energy PartnersStrong evidence
Washington, United StatesHQ checked Sep 5, 20261-105

“OASIS Energy Partners is a full-service consulting and advisory firm at the intersection of energy, environment, and climate.”

Source: company website · checked Sep 5, 2026
18
38 North SolutionsPartial evidence
Washington, DC, United StatesHQ checked Sep 5, 20261-105

“38 North Solutions is a boutique consulting firm that provides a suite of business strategy and public policy services to innovative businesses and organizations.”

Source: company website · checked Sep 5, 2026
19
Technology Transition CorporationPartial evidence
Washington, DC, United StatesHQ checked Sep 5, 20261-105

“TTC grows clean energy industries.”

Source: company website · checked Sep 5, 2026
20
GQS NEW Energy StrategiesPartial evidence
Washington, DC, United StatesHQ checked Sep 5, 20261-105

“Our team leverages deep industry expertise to help you navigate regulatory shifts and seize new opportunities in clean energy.”

Source: company website · checked Sep 5, 2026
21
Lightbox EnergyPartial evidence
Washington, DC, United StatesHQ checked Sep 5, 20261-104

“Lightbox Energy is an energy and sustainability program management firm.”

Source: company website · checked Sep 5, 2026
22
Range RenewablesStrong evidence
Washington, DC, United StatesHQ checked Sep 5, 20261-104

“Range Renewable Advisors (“Range” or “Range Renewables”) is a renewable energy advisory firm focused on helping clients tackle complex financial solutions in development, project…”

Source: company website · checked Sep 5, 2026
23
Global Infrastructure AssociatesPartial evidence
Washington, DC, United StatesHQ checked Sep 5, 202611-502

“Since 2016, GIA has been providing professional consulting services to clients.”

Source: company website · checked Sep 5, 2026
24
SVB Energy InternationalStrong evidence
Washington, DC, United StatesHQ checked Sep 5, 202611-501

“SVB Energy International LLC is a global strategic energy consulting firm specialized in the oil and gas industry.”

Source: company website · checked Sep 5, 2026
25
Jacobson Solutions LLCPartial evidence
Washington, DC, United StatesHQ checked Sep 5, 20261-101

“We are an US-based advisory firm specialized in supporting energy and infrastructure developers, investors, and operators through the disruptions facing their industries today.”

Source: company website · checked Sep 5, 2026

Showing 25 of 58 renewable energy consulting firms based in Washington, United States

See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 558 reachable decision-makers.

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Renewable energy consulting firms based in Washington, United States at a glance

As of Sep 5, 2026
1-10Median size (employees)
HoustonLargest hub · 152 HQs
Contacts with mobile numbers
Sep 5, 2026Data refreshed

Companies by employee count

1-10
40
11-50
12
51-200
5
201-500
1

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 Washington, over 58 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 renewable energy 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 Washington, United States whose own description of what they do matches “renewable energy 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 renewable energy consulting firms, and records with no verified work email. Companies headquartered outside Washington 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, 558 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 5, 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.

Renewable energy consulting firms by metro in the United States

Frequently asked

How many renewable energy consulting firms are there based in Washington, United States?

RevenueBase identified 58 renewable energy consulting firms headquartered in Washington, 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?

Synergy Consulting, INC, headquartered in Washington, tops this list with the largest team on record.

Which city has the most renewable energy consulting firms?

Houston leads with 152 headquartered companies, followed by New York (120) and Denver (71).

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 558 verified decision-maker contacts tracked across these 58 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 5, 2026.

Ready to reach these companies? Verified emails and direct dials for all 58 renewable energy consulting firms based in Washington, United States. Start with a free account, no credit card.

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Related lists

Browse: Companies home · Renewable energy consulting firms in United States · All United States lists · All Renewable energy consulting firms lists · New lists

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.

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