Company lists · Data refreshed September 2026

Top 25 Energy infrastructure law firms worldwide

RevenueBase identified 8,269 energy infrastructure law firms worldwide as of September 2026 and tracks 242,392 professional contacts across them, including 96,516 with verified work emails. The United States is the largest market and Paris the largest hub.

This list covers energy infrastructure law firms worldwide, 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. Country and city lists for energy infrastructure law firms follow the table.

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
8,269Companies
242,392Contacts tracked
96,516Verified emails
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The 25 largest energy infrastructure law firms worldwide

Ranked by team size
Top 25 of 8,269 energy infrastructure law firms worldwide, ranked by team size, largest first. Data refreshed Sep 28, 2026. RevenueBase Smart Search rates how each company's information relates to energy infrastructure 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.
#CompanyRevenueBase Smart SearchHeadquartersEmployeesContacts
1Partial evidenceDallas, TX, United StatesHQ checked Sep 28, 202610001+63,914 contacts →

Partial evidence

“AECOM is the global infrastructure leader, committed to delivering a better world.”

Source: RevenueBase Database · checked Sep 28, 2026
2Partial evidenceHamburg, United KingdomHQ checked Sep 28, 20265,001-10,0006,574 contacts →

Partial evidence

“A&O Shearman transforms the way law is practiced, to deliver unparalleled results for our clients' most complex matters – everywhere in the world.”

Source: RevenueBase Database · checked Sep 28, 2026
3Indirect evidenceChicago, WY, United StatesHQ checked Sep 28, 20261,001-5,0004,156 contacts →

Indirect evidence

“Sargent & Lundy is one of the world’s longest-standing full-service architect engineering firms.”

Source: RevenueBase Database · checked Sep 28, 2026
4Strong evidenceMilwaukee, WI, United StatesHQ checked Sep 28, 20261,001-5,0002,884 contacts →

Strong evidence

“Foley & Lardner LLP stands at the nexus of the Energy & Infrastructure, Health Care & Life Sciences, Innovative Technology, and Manufacturing Sectors.”

Source: RevenueBase Database · checked Sep 28, 2026
5Partial evidenceLondon, United KingdomHQ checked Sep 28, 20261,001-5,0002,498 contacts →

Partial evidence

“An international law firm that acts like your business partner.”

Source: RevenueBase Database · checked Sep 28, 2026
6Indirect evidenceWashington, DC, United StatesHQ checked Sep 28, 20261,001-5,0002,333 contacts →

Indirect evidence

“Arnold & Porter combines sophisticated regulatory, litigation, and transactional capabilities to resolve clients’ most complex issues.”

Source: RevenueBase Database · checked Sep 28, 2026
7Partial evidencePhiladelphia, PA, United StatesHQ checked Sep 28, 20261,001-5,0002,041 contacts →

Partial evidence

“Dechert is the law firm that helps business leaders lead.”

Source: RevenueBase Database · checked Sep 28, 2026
8Indirect evidenceRock Island, IL, United StatesHQ checked Sep 28, 20261,001-5,0001,985 contacts →

Indirect evidence

“Leaders in Engineering and Innovation.”

Source: RevenueBase Database · checked Sep 28, 2026
9Partial evidenceMumbai, IndiaHQ checked Sep 28, 20261,001-5,0001,926 contacts →

Partial evidence

“Trilegal is a leading full-service law firm in India with over 25 years of experience, known for its depth of expertise and client-focused approach.”

Source: RevenueBase Database · checked Sep 28, 2026
10Indirect evidenceUnited StatesHQ checked Sep 28, 20261,001-5,0001,895 contacts →

Indirect evidence

“Troutman Pepper Locke LLP helps clients solve complex legal challenges and achieve their business goals in an ever-changing global economy.”

Source: RevenueBase Database · checked Sep 28, 2026
11Strong evidenceSingaporeHQ checked Sep 28, 20265,001-10,0001,841 contacts →

Strong evidence

“Founded 1972 in Singapore, Rotary Engineering is your Strategic Energy Partner providing Integrated Infrastructure Solutions with a sustainability focus.”

Source: RevenueBase Database · checked Sep 28, 2026
12Partial evidenceWashington, DC, United StatesHQ checked Sep 28, 20261,001-5,0001,790 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 28, 2026
13Partial evidencePhiladelphia, PA, United StatesHQ checked Sep 28, 20261,001-5,0001,682 contacts →

Partial evidence

“Ballard Spahr LLP, an Am Law 100 law firm with more than 750 lawyers in 19 U.S.”

Source: RevenueBase Database · checked Sep 28, 2026
14Strong evidenceDallas, TX, United StatesHQ checked Sep 28, 20261,001-5,0001,558 contacts →

Strong evidence

“Haynes Boone is among the fastest-growing firms in the Am Law 100, providing full-service counsel across sectors, including corporate, energy, financial services, real estate…”

Source: RevenueBase Database · checked Sep 28, 2026
15Partial evidenceSydney, AustraliaHQ checked Sep 28, 20261,001-5,0001,506 contacts →

Partial evidence

“Corrs Chambers Westgarth is Australia’s leading independent law firm.”

Source: RevenueBase Database · checked Sep 28, 2026
16Indirect evidenceTorrance, CA, United StatesHQ checked Sep 28, 20261,001-5,0001,358 contacts →

Indirect evidence

“Partner Assessment Corp.”

Source: RevenueBase Database · checked Sep 28, 2026
17Strong evidencePhoenix, AZ, United StatesHQ checked Sep 28, 20265,001-10,0001,358 contacts →

Strong evidence

“NPL is a nationally recognized leader in energy infrastructure construction, with 50 years of experience.”

Source: RevenueBase Database · checked Sep 28, 2026
18Indirect evidenceBogota, ColombiaHQ checked Sep 28, 20261,001-5,0001,358 contacts →

Indirect evidence

“Ingetec está conformado por un grupo de profesionales con alto nivel de especialización, quienes trabajan dentro de las diferentes gerencias y divisiones que componen la…”

Source: RevenueBase Database · checked Sep 28, 2026
19Strong evidenceLondon, United KingdomHQ checked Sep 28, 20261,001-5,0001,331 contacts →

Strong evidence

“Watson Farley & Williams is a leading international law firm advising clients operating in the energy, infrastructure and transport sectors.”

Source: RevenueBase Database · checked Sep 28, 2026
20Strong evidenceBoston, MA, United StatesHQ checked Sep 28, 20261,001-5,0001,326 contacts →

Strong evidence

“Mintz is a full-service law firm serving clients in the life sciences, energy, private equity, and technology industries.”

Source: RevenueBase Database · checked Sep 28, 2026
21Indirect evidenceWashington, DC, United StatesHQ checked Sep 28, 20261,001-5,0001,297 contacts →

Indirect evidence

“For 125 years, Hunton has served clients across the globe with a collaborative and purposeful approach.”

Source: RevenueBase Database · checked Sep 28, 2026
22Partial evidenceLiverpool, United KingdomHQ checked Sep 28, 20261,001-5,0001,231 contacts →

Partial evidence

“An unpredictable world calls for a progressive-thinking law firm that’s aligned to your ambitions.”

Source: RevenueBase Database · checked Sep 28, 2026
23Partial evidencePittsburgh, PA, United StatesHQ checked Sep 28, 2026501-1,0001,197 contacts →

Partial evidence

“Buchanan Ingersoll & Rooney is a national law firm with a proven reputation for providing progressive, industry-leading legal, business, regulatory and government relations advice…”

Source: RevenueBase Database · checked Sep 28, 2026
24Partial evidenceCalgary, AB, CanadaHQ checked Sep 28, 2026501-1,0001,144 contacts →

Partial evidence

“For over a century, Bennett Jones has been an internationally recognized Canadian law firm founded and focused on principles of professional excellence, integrity, respect and…”

Source: RevenueBase Database · checked Sep 28, 2026
25Partial evidenceBirmingham, United KingdomHQ checked Sep 28, 20261,001-5,000989 contacts →

Partial evidence

“Shakespeare Martineau is a leading law firm that brings creativity, commerciality and clarity to complex challenges.”

Source: RevenueBase Database · checked Sep 28, 2026

Showing 25 of 8,269 energy infrastructure law firms worldwide

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Energy infrastructure law firms worldwide at a glance

As of Sep 28, 2026
39.8%Verified-email coverage
29.3Average contacts per company
1-10Median size (employees)
2.1%Largest-city concentration · Paris
Sep 28, 2026Page data refreshed

Companies by employee count

1-10
4,724
11-50
2,643
51-200
609
201-500
145
501-1,000
48
1,001-5,000
51
5,001-10,000
10
10001+
5

Email recency is reported on each country list linked below.

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 infrastructure 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.
Coverage
Every country. Country and city lists for energy infrastructure law firms are linked below.
What qualifies
Companies worldwide whose own description of what they do matches “energy infrastructure 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 energy infrastructure 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 energy infrastructure law firms, and records with no verified work email.
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, 96,516 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 infrastructure law firms by location

66 lists · largest first

Every Energy infrastructure law firms list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.

Countries

Cities

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 infrastructure 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 energy infrastructure law firms are there worldwide?

RevenueBase identified 8,269 energy infrastructure law firms worldwide 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?

AECOM, headquartered in Dallas, tops this list with the largest team on record.

Which country has the most energy infrastructure law firms?

The United States leads with 1,737 companies, followed by Brazil (656) and France (377). Every energy infrastructure law firms list by country and city is linked on this page.

Which city has the most energy infrastructure law firms?

Paris leads with 174 headquartered companies, followed by Sao Paulo (155) and Houston (152).

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 96,516 verified decision-maker contacts tracked across these 8,269 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.