Company lists · Data refreshed September 2026

Top 22 Renewable energy consultancy companies based in Washington, United States

Name: Renewable energy consultancy companies based in Washington, United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 5, 2026 45 companies tracked

RevenueBase identified 45 renewable energy consultancy companies headquartered in Washington, United States as of September 2026 and tracks 718 professional contacts across them, including 397 with verified work emails. Houston is the largest hub.

This list covers renewable energy consultancy companies 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

45Companies

718Contacts tracked

397Verified emails

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The 22 largest renewable energy consultancy companies based in Washington, United States

Ranked by team size

Top 22 of 45 renewable energy consultancy companies 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 consultancy companies: 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	Synergy Consulting, INCIndirect evidence	Washington, DC, United StatesHQ checked Sep 5, 2026	51-200	434
	“Synergy Consulting is Global Leader in Financial and Corporate Advisory.” Source: company website · checked Sep 5, 2026
2	Baumann ConsultingIndirect evidence	Washington, DC, United StatesHQ checked Sep 5, 2026	51-200	63
	“Baumann Consulting is driven to deliver solutions for a carbon-neutral real estate industry.” Source: company website · checked Sep 5, 2026
3	NorthbridgeIndirect evidence	Washington, United StatesHQ checked Sep 5, 2026	11-50	24
	“At Northbridge, we provide our clients with the tools and expertise to help solve complex financial, policy, and environmental challenges.” Source: company website · checked Sep 5, 2026
4	North Arrow, INCIndirect evidence	Washington, DC, United StatesHQ checked Sep 5, 2026	11-50	22
	“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
5	Grid Strategies LLCPartial evidence	Washington, DC, United StatesHQ checked Sep 5, 2026	11-50	17
	“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
6	Numark Associates, INCIndirect evidence	Washington, DC, United StatesHQ checked Sep 5, 2026	11-50	15
	Source: company website · checked Sep 5, 2026
7	Co2efficientIndirect evidence	Washington, DC, United StatesHQ checked Sep 5, 2026	1-10	14
	“CO2EFFICIENT LLC (COEFFICIENT) was founded in 2017 as a mission-focused Washington, D.C.” Source: company website · checked Sep 5, 2026
8	Sustainable YOUIndirect evidence	Washington, DC, United StatesHQ checked Sep 5, 2026	51-200	14
	“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
9	S2 StrategiesPartial evidence	Washington, DC, United StatesHQ checked Sep 5, 2026	11-50	11
	“S2 Strategies is an energy advisory firm founded in 2023 by Sam Ricketts and Shara Mohtadi.” Source: company website · checked Sep 5, 2026
10	Green Strategies, INCIndirect evidence	Washington, DC, United StatesHQ checked Sep 5, 2026	1-10	8
	“Green Strategies Inc.” Source: company website · checked Sep 5, 2026
11	Partnership International, INCIndirect evidence	Washington, DC, United StatesHQ checked Sep 5, 2026	11-50	7
	“Partnership International, Inc, founded in 1990, is an international consulting firm that provides socio-economic, regulatory, institutional, technical, commercial and financial…” Source: company website · checked Sep 5, 2026
12	Green CapitolPartial evidence	Washington, United StatesHQ checked Sep 5, 2026	1-10	7
	“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
13	Energy Shrink, LLCPartial evidence	Washington, DC, United StatesHQ checked Sep 5, 2026	1-10	6
	“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
14	Amala Clean Energy AdvisorsPartial evidence	Washington, DC, United StatesHQ checked Sep 5, 2026	11-50	6
	“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
15	38 North SolutionsIndirect evidence	Washington, DC, United StatesHQ checked Sep 5, 2026	1-10	5
	“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
16	GQS NEW Energy StrategiesPartial evidence	Washington, DC, United StatesHQ checked Sep 5, 2026	1-10	5
	“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
17	Deborah Brosnan & AssociatesIndirect evidence	Washington, DC, United StatesHQ checked Sep 5, 2026	1-10	4
	“Leading and innovative company that finding solutions, bridging gaps and driving positive action for clients and the planet.” Source: company website · checked Sep 5, 2026
18	Range RenewablesStrong evidence	Washington, DC, United StatesHQ checked Sep 5, 2026	1-10	4
	“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
19	Global Infrastructure AssociatesIndirect evidence	Washington, DC, United StatesHQ checked Sep 5, 2026	11-50	2
	“Since 2016, GIA has been providing professional consulting services to clients.” Source: company website · checked Sep 5, 2026
20	Brolte, LLCPartial evidence	Washington, DC, United StatesHQ checked Sep 5, 2026	1-10	1
	“Brolte, LLC is a single-member consulting firm specializing in the delivery of energy efficiency and financial consulting.” Source: company website · checked Sep 5, 2026
21	Point EnergyStrong evidence	Washington, DC, United StatesHQ checked Sep 5, 2026	1-10	1
	“Point Energy is a highly specialized and agile end-to-end strategic consultancy and operator in all aspects of the renewable energy industry.” Source: company website · checked Sep 5, 2026
22	Andmore Associates, LLCPartial evidence	Washington, United StatesHQ checked Sep 5, 2026	1-10	1
	“AndMore Associates LLC is a global business development and consulting firm focused on advancing markets and building partnerships in agriculture, energy, and environment.” Source: company website · checked Sep 5, 2026

Showing 22 of 45 renewable energy consultancy companies based in Washington, United States

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Renewable energy consultancy companies based in Washington, United States at a glance

As of Sep 5, 2026

1-10Median size (employees)

HoustonLargest hub · 115 HQs

Contacts with mobile numbers

Sep 5, 2026Data 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 this city, so it is reported there. Company counts and contact totals on this page are exact for Washington, over 45 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 consultancy companies, 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 consultancy companies”. 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 consultancy companies, 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, 397 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 consultancy companies by metro in the United States

Frequently asked

How many renewable energy consultancy companies are there based in Washington, United States?

RevenueBase identified 45 renewable energy consultancy companies 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 consultancy companies?

Houston leads with 115 headquartered companies, followed by New York (83) and Denver (53).

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 397 verified decision-maker contacts tracked across these 45 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.

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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.