Company lists · Data refreshed September 2026

Top 25 Public-private partnership law firms based in Washington, United States

Name: Public-private partnership 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 29, 2026 98 companies tracked

RevenueBase identified 98 public-private partnership law firms headquartered in Washington, United States as of September 2026 and tracks 5,923 professional contacts across them, including 3,926 with verified work emails. Across the United States, Washington is the largest hub for this category.

This list covers public-private partnership 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 29, 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 29, 2026 86% judged on-target in blind review

98Companies

5,923Contacts tracked

3,926Verified emails

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The 25 largest public-private partnership law firms based in Washington, United States

Ranked by team size

Top 25 of 98 public-private partnership law firms based in Washington, United States, ranked by team size, largest first. Data refreshed Sep 29, 2026. RevenueBase Smart Search rates how each company's information relates to public-private partnership 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	Arnold & Porter	Indirect evidence	Washington, DC, United StatesHQ checked Sep 29, 2026	1,001-5,000	2,333 contacts →
	Indirect evidence “Arnold & Porter combines sophisticated regulatory, litigation, and transactional capabilities to resolve clients’ most complex issues.” Source: RevenueBase Database · checked Sep 29, 2026
2	Venable LLP	Partial evidence	Washington, DC, United StatesHQ checked Sep 29, 2026	1,001-5,000	1,790 contacts →
	Partial evidence “Committed to Your Success – As a law firm of more than 900 professionals, Venable delivers legal services globally in every area of regulatory compliance, government affairs…” Source: RevenueBase Database · checked Sep 29, 2026
3	Wiley Rein LLP	Indirect evidence	Washington, DC, United StatesHQ checked Sep 29, 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 29, 2026
4	Keller And Heckman LLP	Strong evidence	Washington, DC, United StatesHQ checked Sep 29, 2026	51-200	230 contacts →
	Strong evidence “Keller and Heckman, founded in 1962, has a broad practice in the areas of regulatory law, public policy, and litigation, serving both domestic and international clients.” Source: RevenueBase Database · checked Sep 29, 2026
5	VAN Ness Feldman LLP	Partial evidence	Washington, DC, United StatesHQ checked Sep 29, 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 29, 2026
6	Reno & Cavanaugh, Pllc	Strong evidence	Washington, DC, United StatesHQ checked Sep 29, 2026	51-200	73 contacts →
	Strong 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 29, 2026
7	Pilieromazza Pllc	Partial evidence	Washington, DC, United StatesHQ checked Sep 29, 2026	51-200	70 contacts →
	Partial evidence “PilieroMazza – a business law firm – serves as a strategic partner to government contractors and commercial businesses from across the United States in numerous industries.” Source: RevenueBase Database · checked Sep 29, 2026
8	Carmen Group	Indirect evidence	Washington, DC, United StatesHQ checked Sep 29, 2026	51-200	51 contacts →
	Indirect evidence “Carmen Group is Washington’s leading government affairs consulting firm.” Source: RevenueBase Database · checked Sep 29, 2026
9	Tiber Hudson LLC	Partial evidence	Washington, DC, United StatesHQ checked Sep 29, 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 29, 2026
10	Spiegel & Mcdiarmid LLP	Partial evidence	Washington, DC, United StatesHQ checked Sep 29, 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 29, 2026
11	Duncan, Weinberg, Genzer & Pembroke, P.C. Dwgp	Indirect evidence	Washington, DC, United StatesHQ checked Sep 29, 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 29, 2026
12	Penn Hill Group	Indirect evidence	Washington, DC, United StatesHQ checked Sep 29, 2026	1-10	20 contacts →
	Indirect evidence “The experience, policy knowledge, procedural expertise and relationships that Penn Hill Group brings to the table are second to none.” Source: RevenueBase Database · checked Sep 29, 2026
13	Jefferson Consulting Group	Indirect evidence	Washington, DC, United StatesHQ checked Sep 29, 2026	51-200	19 contacts →
	Indirect evidence “JCG is a woman-owned, Washington, DC professional services firm that provides results-driven advice and hands-on assistance to our industry clients and government customers.” Source: RevenueBase Database · checked Sep 29, 2026
14	E&w LAW	Indirect evidence	Washington, DC, United StatesHQ checked Sep 29, 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 29, 2026
15	Harkins Cunningham LLP	Partial evidence	Washington, DC, United StatesHQ checked Sep 29, 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 29, 2026
16	Asmar, Schor & Mckenna, Pllc	Partial evidence	Washington, DC, United StatesHQ checked Sep 29, 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 29, 2026
17	Ferox Strategies	Indirect evidence	Washington, DC, United StatesHQ checked Sep 29, 2026	1-10	17 contacts →
	Indirect evidence “Ferox: Latin for courageous, fierce, aggressive, predecessor of “ferocious.” Ferox is what you need on your side: always ready for battle and to fight for you, and never quitting…” Source: RevenueBase Database · checked Sep 29, 2026
18	Smith Garson	Strong evidence	Washington, DC, United StatesHQ checked Sep 29, 2026	1-10	16 contacts →
	Strong evidence “Established in 1981, Smith Garson (formerly Smith Dawson & Andrews) is a full-service government relations firm that works with public and private sector clients to develop and…” Source: RevenueBase Database · checked Sep 29, 2026
19	Levine, Blaszak, Block & Boothby, LLP	Indirect evidence	Washington, DC, United StatesHQ checked Sep 29, 2026	11-50	13 contacts →
	Indirect 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 29, 2026
20	Boyden Gray Pllc	Partial evidence	Washington, DC, United StatesHQ checked Sep 29, 2026	11-50	13 contacts →
	Partial evidence “Boyden Gray PLLC is a boutique litigation and public policy firm, continuing C.” Source: RevenueBase Database · checked Sep 29, 2026
21	The Bristol Group Pllc	Indirect evidence	Washington, DC, United StatesHQ checked Sep 29, 2026	1-10	12 contacts →
	Indirect evidence “The Bristol Group is a premier Washington, D.C.” Source: RevenueBase Database · checked Sep 29, 2026
22	Rebel North America	Indirect evidence	Washington, DC, United StatesHQ checked Sep 29, 2026	51-200	12 contacts →
	Indirect evidence “As one of the leading U.S.” Source: RevenueBase Database · checked Sep 29, 2026
23	Watkinson Miller Pllc	Partial evidence	Washington, DC, United StatesHQ checked Sep 29, 2026	11-50	12 contacts →
	Partial evidence “WATKINSON MILLER PLLC is a law practice company based out of 1100 New Jersey Ave SE Suite 910, WASHINGTON, District of Columbia, United States.” Source: RevenueBase Database · checked Sep 29, 2026
24	Greengate LLC	Indirect evidence	Washington, DC, United StatesHQ checked Sep 29, 2026	11-50	12 contacts →
	Indirect evidence “Greengate was founded in 2005 by senior financial professionals with extensive backgrounds in project and structured finance.” Source: RevenueBase Database · checked Sep 29, 2026
25	Peter Damon Group	Partial evidence	Washington, DC, United StatesHQ checked Sep 29, 2026	1-10	12 contacts →
	Partial evidence “Peter Damon Group is a strategic advisory and public affairs firm that helps organizations navigate complex challenges, build meaningful relationships, and advance strategic…” Source: RevenueBase Database · checked Sep 29, 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: public-private partnership 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 public-private partnership law firms.
Partial evidence: Its own public description names part of public-private partnership law firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name public-private partnership 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 98 public-private partnership law firms based in Washington, United States

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Public-private partnership law firms based in Washington, United States at a glance

As of Sep 29, 2026

66.3%Verified-email coverage

60.4Average contacts per company

1-10Median size (employees)

Sep 29, 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 98 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 public-private partnership 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 “public-private partnership 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 public-private partnership 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 public-private partnership 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, 3,926 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 29, 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.

Public-private partnership 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 public-private partnership 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 public-private partnership law firms are there based in Washington, United States?

RevenueBase identified 98 public-private partnership 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?

Arnold & Porter, headquartered in Washington, tops this list with the largest team on record.

Which city in the United States has the most public-private partnership law firms?

Washington leads the United States with 98 headquartered companies, followed by New York (90) and Chicago (52).

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 3,926 verified decision-maker contacts tracked across these 98 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 29, 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.