Company lists · Data refreshed September 2026

Top 25 Energy policy consulting firms based in Washington, United States

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

Compiled by the RevenueBase Data Team Data refreshed Sep 28, 2026 83 companies tracked

RevenueBase identified 83 energy policy consulting firms headquartered in Washington, United States as of September 2026 and tracks 996 professional contacts across them, including 531 with verified work emails. Across the United States, Houston is the largest hub for this category (125 companies); Washington has 83.

This list covers energy policy 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, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 28, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, 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 RevenueBase Smart Search rating on every row Refreshed Sep 28, 2026 86% judged on-target in blind review

83Companies

996Contacts tracked

531Verified emails

Explore this list → Free signup · no credit card · 500 free credits

The 25 largest energy policy consulting firms based in Washington, United States

Ranked by team size

Top 25 of 83 energy policy consulting firms based in Washington, United States, ranked by team size, largest first. Data refreshed Sep 28, 2026. RevenueBase Smart Search rates how each company's information relates to energy policy consulting firms: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	Synergy Consulting, INC	Partial evidence	Washington, DC, United StatesHQ checked Sep 28, 2026	51-200	434 contacts →
	Partial evidence “Synergy Consulting is Global Leader in Financial and Corporate Advisory.” Source: RevenueBase Database · checked Sep 28, 2026
2	VAN Ness Feldman LLP	Strong evidence	Washington, DC, United StatesHQ checked Sep 28, 2026	51-200	174 contacts →
	Strong evidence “Van Ness Feldman is a nationally recognized mid-sized law firm specializing in the areas of energy, environment, and natural resources law and policy, with offices in Washington…” Source: RevenueBase Database · checked Sep 28, 2026
3	Rapidan Energy Group	Strong evidence	Washington, DC, United StatesHQ checked Sep 28, 2026	11-50	25 contacts →
	Strong evidence “Rapidan Energy Group provides differentiated and actionable insights on energy markets, policy, and geopolitics.” Source: RevenueBase Database · checked Sep 28, 2026
4	Keybridge	Strong evidence	Washington, DC, United StatesHQ checked Sep 28, 2026	11-50	25 contacts →
	Strong evidence “Keybridge is a boutique economic and public policy consulting firm.” Source: RevenueBase Database · checked Sep 28, 2026
5	Northbridge	Partial evidence	Washington, United StatesHQ checked Sep 28, 2026	11-50	24 contacts →
	Partial evidence “At Northbridge, we provide our clients with the tools and expertise to help solve complex financial, policy, and environmental challenges.” Source: RevenueBase Database · checked Sep 28, 2026
6	The Clark Group LLC	Strong evidence	Washington, DC, United StatesHQ checked Sep 28, 2026	11-50	19 contacts →
	Strong evidence “The Clark Group is an environmental policy consulting firm that provides a broad range of services to government, private and nonprofit clients.” Source: RevenueBase Database · checked Sep 28, 2026
7	E&w LAW	Indirect evidence	Washington, DC, United StatesHQ checked Sep 28, 2026	11-50	18 contacts →
	Indirect evidence “At Earth & Water, we are more than lawyers – we’re strategic advisors with unique experience who advance our clients’ interests across a broad range of environmental and business…” Source: RevenueBase Database · checked Sep 28, 2026
8	Grid Strategies LLC	Strong evidence	Washington, DC, United StatesHQ checked Sep 28, 2026	11-50	17 contacts →
	Strong evidence “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: RevenueBase Database · checked Sep 28, 2026
9	Mission Strategies	Partial evidence	Washington, DC, United StatesHQ checked Sep 28, 2026	11-50	15 contacts →
	Partial evidence “Mission Strategies is the premier boutique government affairs firm serving companies at the forefront of advanced energy, national security, emerging technologies, and domestic…” Source: RevenueBase Database · checked Sep 28, 2026
10	Numark Associates, INC	Indirect evidence	Washington, DC, United StatesHQ checked Sep 28, 2026	11-50	15 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 28, 2026
11	Co2efficient	Indirect evidence	Washington, DC, United StatesHQ checked Sep 28, 2026	1-10	14 contacts →
	Indirect evidence “CO2EFFICIENT LLC (COEFFICIENT) was founded in 2017 as a mission-focused Washington, D.C.” Source: RevenueBase Database · checked Sep 28, 2026
12	Sustainable YOU	Partial evidence	Washington, DC, United StatesHQ checked Sep 28, 2026	51-200	14 contacts →
	Partial evidence “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: RevenueBase Database · checked Sep 28, 2026
13	Hillstaffer, LLC	Partial evidence	Washington, DC, United StatesHQ checked Sep 28, 2026	11-50	13 contacts →
	Partial evidence “Navigating complex policy landscapes?” Source: RevenueBase Database · checked Sep 28, 2026
14	Sustainable Strategies DC	Partial evidence	Washington, DC, United StatesHQ checked Sep 28, 2026	1-10	11 contacts →
	Partial evidence “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: RevenueBase Database · checked Sep 28, 2026
15	S2 Strategies	Partial evidence	Washington, DC, United StatesHQ checked Sep 28, 2026	11-50	11 contacts →
	Partial evidence “S2 Strategies is an energy advisory firm founded in 2023 by Sam Ricketts and Shara Mohtadi.” Source: RevenueBase Database · checked Sep 28, 2026
16	Green Strategies, INC	Indirect evidence	Washington, DC, United StatesHQ checked Sep 28, 2026	1-10	8 contacts →
	Indirect evidence “Green Strategies Inc.” Source: RevenueBase Database · checked Sep 28, 2026
17	Crest Hill Advisors LLC	Strong evidence	Washington, DC, United StatesHQ checked Sep 28, 2026	1-10	7 contacts →
	Strong evidence “Bipartisan policy, legislative, and regulatory advisory services in the communications, technology, and energy sectors.” Source: RevenueBase Database · checked Sep 28, 2026
18	Govnavigators	Indirect evidence	Washington, DC, United StatesHQ checked Sep 28, 2026	1-10	7 contacts →
	Indirect evidence “GovNavigators guide clients through the complexities of government to help them thrive and grow.” Source: RevenueBase Database · checked Sep 28, 2026
19	Green Capitol	Strong evidence	Washington, United StatesHQ checked Sep 28, 2026	1-10	7 contacts →
	Strong evidence “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: RevenueBase Database · checked Sep 28, 2026
20	Energy Shrink, LLC	Strong evidence	Washington, DC, United StatesHQ checked Sep 28, 2026	1-10	6 contacts →
	Strong evidence “Energy Shrink is an environmental consulting practice specialized in sustainability and energy efficiency in buildings, that is, high-performance or green buildings.” Source: RevenueBase Database · checked Sep 28, 2026
21	38 North Solutions	Strong evidence	Washington, DC, United StatesHQ checked Sep 28, 2026	1-10	5 contacts →
	Strong evidence “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: RevenueBase Database · checked Sep 28, 2026
22	ALT Surya	Partial evidence	Washington, DC, United StatesHQ checked Sep 28, 2026	1-10	5 contacts →
	Partial evidence “Alt Surya is a global climate advisory firm, which provides expert consulting services to clients in Asia and North America.” Source: RevenueBase Database · checked Sep 28, 2026
23	Oasis Energy Partners	Strong evidence	Washington, United StatesHQ checked Sep 28, 2026	1-10	5 contacts →
	Strong evidence “OASIS Energy Partners is a full-service consulting and advisory firm at the intersection of energy, environment, and climate.” Source: RevenueBase Database · checked Sep 28, 2026
24	GQS NEW Energy Strategies	Partial evidence	Washington, DC, United StatesHQ checked Sep 28, 2026	1-10	5 contacts →
	Partial evidence “Our team leverages deep industry expertise to help you navigate regulatory shifts and seize new opportunities in clean energy.” Source: RevenueBase Database · checked Sep 28, 2026
25	Deborah Brosnan & Associates	Indirect evidence	Washington, DC, United StatesHQ checked Sep 28, 2026	1-10	4 contacts →
	Indirect evidence “Leading and innovative company that finding solutions, bridging gaps and driving positive action for clients and the planet.” Source: RevenueBase Database · checked Sep 28, 2026

RevenueBase Smart Search

RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: energy policy consulting firms. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.

Strong evidence: The company's own public description of its business names energy policy consulting firms.
Partial evidence: Its own public description names part of energy policy consulting firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name energy policy consulting firms. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.

RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.

Showing 25 of 83 energy policy 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 531 reachable decision-makers.

Free signup · no credit card

View the full list →

Energy policy consulting firms based in Washington, United States at a glance

As of Sep 28, 2026

53.3%Verified-email coverage

12.0Average contacts per company

1-10Median size (employees)

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

Email recency for this list is measured across the whole United States list rather than for Washington, so it is reported there. Company counts and contact totals on this page are exact for Washington, over 83 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 energy policy consulting firms, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search 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 Smart Search, 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 “energy policy consulting firms”. Matching reads each company's description, not its industry code or its name.
RevenueBase Smart Search: RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names energy policy consulting firms), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
What we exclude: Companies whose own description does not clearly place them among energy policy 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 its RevenueBase Smart Search 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, 531 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 28, 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.

Energy policy consulting firms by metro in the United States

Frequently asked

What is RevenueBase Smart Search?

RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names energy policy consulting firms, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.

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

RevenueBase identified 83 energy policy 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 in the United States has the most energy policy consulting firms?

Houston leads the United States with 125 headquartered companies, followed by New York (84) and Washington (83).

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 531 verified decision-maker contacts tracked across these 83 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 28, 2026.

Ready to reach these companies? Verified emails and direct dials for all 83 energy policy consulting firms based in Washington, United States. Start with a free account, no credit card.

Download this list →

Related lists

Energy policy consulting firms by geography

Browse the directory

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 Smart Search, 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.