Company lists · Data refreshed September 2026

Top 25 Infrastructure finance law firms based in Washington, United States

Name: Infrastructure finance law 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 60 companies tracked

RevenueBase identified 60 infrastructure finance law firms headquartered in Washington, United States as of September 2026 and tracks 1,766 professional contacts across them, including 1,051 with verified work emails. Across the United States, New York is the largest hub for this category (96 companies); Washington follows with 60.

This list covers infrastructure finance law 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

60Companies

1,766Contacts tracked

1,051Verified emails

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The 25 largest infrastructure finance law firms based in Washington, United States

Ranked by team size

Top 25 of 60 infrastructure finance law 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 infrastructure finance law 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	Wiley Rein LLP	Indirect evidence	Washington, DC, United StatesHQ checked Sep 28, 2026	501-1,000	576 contacts →
	Indirect evidence “Founded in 1983, Wiley is a dominant presence in the nation’s capital.” Source: RevenueBase Database · checked Sep 28, 2026
2	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
3	VAN Ness Feldman LLP	Partial evidence	Washington, DC, United StatesHQ checked Sep 28, 2026	51-200	174 contacts →
	Partial 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
4	Astris Finance, LLC	Strong evidence	Washington, DC, United StatesHQ checked Sep 28, 2026	51-200	74 contacts →
	Strong evidence “Founded in Astris Finance, a Colliers company, is an independent financial advisory firm specialized in the Infrastructure and Energy (I&E) sectors with an exceptional track…” Source: RevenueBase Database · checked Sep 28, 2026
5	Reno & Cavanaugh, Pllc	Partial evidence	Washington, DC, United StatesHQ checked Sep 28, 2026	51-200	73 contacts →
	Partial evidence “Since 1977, Reno & Cavanaugh has been a national law firm dedicated to strengthening communities through strategic use of public and private resources.” Source: RevenueBase Database · checked Sep 28, 2026
6	Tiber Hudson LLC	Partial evidence	Washington, DC, United StatesHQ checked Sep 28, 2026	11-50	36 contacts →
	Partial evidence “Tiber Hudson LLC is a boutique law firm focused in providing legal services including complex commercial litigation, complex commercial transactions, corporate structure and…” Source: RevenueBase Database · checked Sep 28, 2026
7	Spiegel & Mcdiarmid LLP	Partial evidence	Washington, DC, United StatesHQ checked Sep 28, 2026	11-50	29 contacts →
	Partial evidence “Spiegel & McDiarmid LLP was formed to represent the public side of our nation’s critical infrastructure industries, including energy, telecommunications and transportation.” Source: RevenueBase Database · checked Sep 28, 2026
8	Duncan, Weinberg, Genzer & Pembroke, P.C. Dwgp	Indirect evidence	Washington, DC, United StatesHQ checked Sep 28, 2026	11-50	28 contacts →
	Indirect evidence “Since its founding in 1971, DWG & P, has provided a broad range of counseling, regulatory, litigation and legislative services to clients in every region of the country.” Source: RevenueBase Database · checked Sep 28, 2026
9	Luse Gorman, PC	Strong evidence	Washington, DC, United StatesHQ checked Sep 28, 2026	11-50	21 contacts →
	Strong evidence “Luse Gorman was founded in 1993 as a specialty law firm dedicated to representing financial institutions, with a particular emphasis on community banks.” Source: RevenueBase Database · checked Sep 28, 2026
10	Amis Patel Brewer	Partial evidence	Washington, DC, United StatesHQ checked Sep 28, 2026	1-10	18 contacts →
	Partial evidence “Amis, Patel & Brewer, LLP is a boutique law firm focused on providing legal services to the renewable energy and sustainability sectors.” Source: RevenueBase Database · checked Sep 28, 2026
11	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
12	Harkins Cunningham LLP	Partial evidence	Washington, DC, United StatesHQ checked Sep 28, 2026	1-10	18 contacts →
	Partial evidence “Harkins Cunningham LLP is a law firm engaged in optimizing risk and opportunities in complex matters in highly regulated and politicized environments.” Source: RevenueBase Database · checked Sep 28, 2026
13	Asmar, Schor & Mckenna, Pllc	Partial evidence	Washington, DC, United StatesHQ checked Sep 28, 2026	11-50	17 contacts →
	Partial evidence “The attorneys of Asmar, Schor & McKenna are recognized leaders in all areas of construction law, commercial real estate transactions and commercial leasing.” Source: RevenueBase Database · checked Sep 28, 2026
14	Rock Creek Energy Group, LLP	Indirect evidence	Washington, DC, United StatesHQ checked Sep 28, 2026	11-50	17 contacts →
	Indirect evidence “Rock Creek Energy Group is a group of diverse and like-minded professionals with a shared passion – Energy.” Source: RevenueBase Database · checked Sep 28, 2026
15	PAN Services DC	Partial evidence	Washington, DC, United StatesHQ checked Sep 28, 2026	1-10	17 contacts →
	Partial evidence “Pan Services is an International Full-Service Infrastructure Development and Management Advisory services firm offering Design, Engineering, Construction, Consulting and…” Source: RevenueBase Database · checked Sep 28, 2026
16	Sustainable Capital Advisors	Strong evidence	Washington, DC, United StatesHQ checked Sep 28, 2026	11-50	14 contacts →
	Strong evidence “Sustainable Capital Advisors (SCA) is a strategy consulting and financial advisory firm focused on delivering innovative capital solutions for the sustainable infrastructure…” Source: RevenueBase Database · checked Sep 28, 2026
17	Levine, Blaszak, Block & Boothby, LLP	Partial evidence	Washington, DC, United StatesHQ checked Sep 28, 2026	11-50	13 contacts →
	Partial evidence “Since it was founded in 1993, LB3 has been the leading firm guiding large customers through a maze of legal, technical, financial, and regulatory issues to close world-class…” Source: RevenueBase Database · checked Sep 28, 2026
18	Rebel North America	Indirect evidence	Washington, DC, United StatesHQ checked Sep 28, 2026	51-200	12 contacts →
	Indirect evidence “As one of the leading U.S.” Source: RevenueBase Database · checked Sep 28, 2026
19	Greengate LLC	Partial evidence	Washington, DC, United StatesHQ checked Sep 28, 2026	11-50	12 contacts →
	Partial evidence “Greengate was founded in 2005 by senior financial professionals with extensive backgrounds in project and structured finance.” Source: RevenueBase Database · checked Sep 28, 2026
20	Taylor-Dejongh	Partial evidence	Washington, DC, United StatesHQ checked Sep 28, 2026	11-50	12 contacts →
	Partial evidence “Taylor-DeJongh (TDJ) is an international financial advisory firm based in Washington, D.C.” Source: RevenueBase Database · checked Sep 28, 2026
21	Mida Advisors	Partial evidence	Washington, DC, United StatesHQ checked Sep 28, 2026	11-50	10 contacts →
	Partial evidence “MiDA Advisors (MiDA) is a U.S-based global financial advisory firm specializing in institutional investments and trade services in frontier and emerging markets.” Source: RevenueBase Database · checked Sep 28, 2026
22	Magnitude Global Finance	Partial evidence	Washington, DC, United StatesHQ checked Sep 28, 2026	1-10	9 contacts →
	Partial evidence “Magnitude Global Finance (MGF) focuses on finding solutions to the most challenging financing issues faced by companies, donors, and governments.” Source: RevenueBase Database · checked Sep 28, 2026
23	Hoya Advisory	Partial evidence	Washington, DC, United StatesHQ checked Sep 28, 2026	11-50	9 contacts →
	Partial evidence “Hoya Advisory is a boutique global advisory firm connecting institutional capital, family offices, and sovereign investors with exceptional opportunities across infrastructure…” Source: RevenueBase Database · checked Sep 28, 2026
24	O Riordan Bethel LAW Firm, LLP	Indirect evidence	Washington, DC, United StatesHQ checked Sep 28, 2026	11-50	7 contacts →
	Indirect evidence “Nationally-recognized and award-winning economists, lawyers and public policy experts providing public policy analysis; business process improvement; research and analysis…” Source: RevenueBase Database · checked Sep 28, 2026
25	Partnership International, INC	Partial evidence	Washington, DC, United StatesHQ checked Sep 28, 2026	11-50	7 contacts →
	Partial evidence “Partnership International, Inc, founded in 1990, is an international consulting firm that provides socio-economic, regulatory, institutional, technical, commercial and financial…” 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: infrastructure finance law 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 infrastructure finance law firms.
Partial evidence: Its own public description names part of infrastructure finance law firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name infrastructure finance law 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 60 infrastructure finance law firms based in Washington, United States

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Infrastructure finance law firms based in Washington, United States at a glance

As of Sep 28, 2026

59.5%Verified-email coverage

29.4Average contacts per company

1-10Median size (employees)

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

501-1,000

1,001-5,000

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 60 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 finance law 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 “infrastructure finance law 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 infrastructure finance law 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 infrastructure finance law 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, 1,051 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.

Infrastructure finance law 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 infrastructure finance law 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 infrastructure finance law firms are there based in Washington, United States?

RevenueBase identified 60 infrastructure finance law 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?

Wiley Rein LLP, headquartered in Washington, tops this list with the largest team on record.

Which city in the United States has the most infrastructure finance law firms?

New York leads the United States with 96 headquartered companies, followed by Washington (60) and Houston (39).

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 1,051 verified decision-maker contacts tracked across these 60 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.

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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 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.