Company lists · Data refreshed September 2026

Top 25 Sustainable development firms worldwide

Name: Sustainable development firms worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 22, 2026 26,262 companies tracked

RevenueBase identified 26,262 sustainable development firms worldwide as of September 2026 and tracks 326,748 professional contacts across them, including 89,778 with verified work emails. Brazil is the largest market and London the largest hub.

This list covers sustainable development 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 22, 2026. Country and city lists for sustainable development 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 22, 2026 86% judged on-target in blind review

26,262Companies

326,748Contacts tracked

89,778Verified emails

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The 25 largest sustainable development firms worldwide

Ranked by team size

Top 25 of 26,262 sustainable development firms worldwide, ranked by team size, largest first. Data refreshed Sep 22, 2026. RevenueBase Smart Search rates how each company's information relates to sustainable development 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	Worley	Indirect evidence	Sydney, AustraliaHQ checked Sep 22, 2026	10001+	34,763 contacts →
	Indirect evidence “Worley is a global professional services company of energy, chemicals and resources experts headquartered in Australia.” Source: RevenueBase Database · checked Sep 22, 2026
2	Acciona	Indirect evidence	Madrid, SpainHQ checked Sep 22, 2026	10001+	27,028 contacts →
	Indirect evidence “ACCIONA champions a different way of doing business: Business as Unusual, delivering benefits far beyond the corporate realm.” Source: RevenueBase Database · checked Sep 22, 2026
3	ERM	Partial evidence	London, United KingdomHQ checked Sep 22, 2026	5,001-10,000	9,119 contacts →
	Partial evidence “Sustainability is our business.” Source: RevenueBase Database · checked Sep 22, 2026
4	Chemonics International	Indirect evidence	Washington, DC, United StatesHQ checked Sep 22, 2026	1,001-5,000	4,410 contacts →
	Indirect evidence “In a world where conditions are changing faster, resources are tighter, and the path to results is increasingly complex, delivery matters more than ever.” Source: RevenueBase Database · checked Sep 22, 2026
5	SLR Consulting	Partial evidence	London, United KingdomHQ checked Sep 22, 2026	1,001-5,000	3,848 contacts →
	Partial evidence “SLR is a committed partner in our clients’ sustainability journeys.” Source: RevenueBase Database · checked Sep 22, 2026
6	WSP I Sverige	Indirect evidence	Stockholm-marievik, SwedenHQ checked Sep 22, 2026	10001+	2,607 contacts →
	Indirect evidence “What if you could shape built and natural environments – and the future of those that use them?” Source: RevenueBase Database · checked Sep 22, 2026
7	Swca Environmental Consultants	Indirect evidence	Phoenix, AZ, United StatesHQ checked Sep 22, 2026	1,001-5,000	1,629 contacts →
	Indirect evidence “Founded on a commitment to sound science and creative solutions, SWCA is a leader in environmental and management consulting services.” Source: RevenueBase Database · checked Sep 22, 2026
8	Vulcain Engineering Group	Indirect evidence	Neuilly-sur-seine, FranceHQ checked Sep 22, 2026	5,001-10,000	1,496 contacts →
	Indirect evidence “Vulcain Engineering Group is a multi-specialist engineering and consulting group serving industrial companies across the globe, focused on critical sectors: energy, health…” Source: RevenueBase Database · checked Sep 22, 2026
9	HMV Ingenieros	Indirect evidence	Medellín, ColombiaHQ checked Sep 22, 2026	1,001-5,000	1,455 contacts →
	Indirect evidence “Somos una empresa de soluciones de ingeniería y tecnología que brinda servicios de consultoría, interventoría o supervisión y gerencia de proyectos para múltiples sectores.” Source: RevenueBase Database · checked Sep 22, 2026
10	GFA Consulting Group Gmbh	Partial evidence	Hamburg, GermanyHQ checked Sep 22, 2026	1,001-5,000	1,382 contacts →
	Partial evidence “GFA Consulting Group is one of Europe's leading consulting firms in the field of international development cooperation.” Source: RevenueBase Database · checked Sep 22, 2026
11	Posco E&c	Indirect evidence	United StatesHQ checked Sep 22, 2026	5,001-10,000	1,345 contacts →
	Indirect evidence “Construction & Engineering” Source: RevenueBase Database · checked Sep 22, 2026
12	IPE Global Limited	Indirect evidence	New Delhi, IndiaHQ checked Sep 22, 2026	501-1,000	1,322 contacts →
	Indirect evidence “Headquartered in India with six international offices in Cambodia, Ethiopia, Kenya, the Philippines, Germany and the United Kingdom, IPE Global Group offers a range of integrated…” Source: RevenueBase Database · checked Sep 22, 2026
13	Fichtner	Indirect evidence	Stuttgart, GermanyHQ checked Sep 22, 2026	1,001-5,000	1,279 contacts →
	Indirect evidence “As a leading, independent engineering and consultancy enterprise active in the sectors of energy and infrastructure, Fichtner handles challenging projects in countries all over…” Source: RevenueBase Database · checked Sep 22, 2026
14	OLA	Partial evidence	Austin, TX, United StatesHQ checked Sep 22, 2026	n/a	1,145 contacts →
	Partial evidence “OLA Sustainability, LLC OLA Sustainability is a consulting firm that focuses on integrating sustainable practices into commercial and multifamily design projects.” Source: RevenueBase Database · checked Sep 22, 2026
15	Lycopodium	Partial evidence	Perth, AustraliaHQ checked Sep 22, 2026	1,001-5,000	1,143 contacts →
	Partial evidence “Lycopodium is an Australian headquartered engineering and project management consultancy which provides a complete range of services for the evaluation, development…” Source: RevenueBase Database · checked Sep 22, 2026
16	TSE	Partial evidence	São Paulo/sp, BrazilHQ checked Sep 22, 2026	5,001-10,000	1,067 contacts →
	Partial evidence “Somos a TSE - Total Sustainable Engineering.” Source: RevenueBase Database · checked Sep 22, 2026
17	Associated Engineering	Indirect evidence	Edmonton, AB, CanadaHQ checked Sep 22, 2026	501-1,000	1,021 contacts →
	Indirect evidence “At Associated, we are passionate about building communities that are vibrant, healthy and resilient and support economic growth.” Source: RevenueBase Database · checked Sep 22, 2026
18	Penspen	Partial evidence	London, United KingdomHQ checked Sep 22, 2026	1,001-5,000	1,007 contacts →
	Partial evidence “Penspen designs, maintains, and optimises energy infrastructure to improve access to secure and sustainable energy for communities worldwide.” Source: RevenueBase Database · checked Sep 22, 2026
19	Pares&alvarez	Indirect evidence	Santiago, ChileHQ checked Sep 22, 2026	501-1,000	807 contacts →
	Indirect evidence “We are Pares & Alvarez, our extensive experience and the recognition of our clients makes us one of the leading Engineering Companies in environmental, consulting, engineering and…” Source: RevenueBase Database · checked Sep 22, 2026
20	Tauw Nederland	Indirect evidence	Deventer, NetherlandsHQ checked Sep 22, 2026	1,001-5,000	800 contacts →
	Indirect evidence “TAUW is een Europees advies- en ingenieursbureau.” Source: RevenueBase Database · checked Sep 22, 2026
21	Telsan Engenharia E Serviços S A	Indirect evidence	Belo Horizonte, BrazilHQ checked Sep 22, 2026	1,001-5,000	765 contacts →
	Indirect evidence “Em 26 de julho de 1995 foi criada a Telsan, uma empresa de engenharia consultiva que tem o orgulho de ter como missão principal a prestação de serviços diferenciados, visando à…” Source: RevenueBase Database · checked Sep 22, 2026
22	Mars Planning & Engineering Services Private Limited	Indirect evidence	Ahmedabad, IndiaHQ checked Sep 22, 2026	1,001-5,000	712 contacts →
	Indirect evidence “In the wake of the devastation caused by the earthquake in Gujarat in 2001, MaRS was established with the objective to provide assistance and aid to the local & state governing…” Source: RevenueBase Database · checked Sep 22, 2026
23	Inerco	Strong evidence	Sevilla, SpainHQ checked Sep 22, 2026	1,001-5,000	688 contacts →
	Strong evidence “INERCO, with 30 years of experience, offers comprehensive services and develops advanced technologies that contribute to sustainable industrial development, acting as a leader in…” Source: RevenueBase Database · checked Sep 22, 2026
24	Schwager	Indirect evidence	Santiago, ChileHQ checked Sep 22, 2026	501-1,000	671 contacts →
	Indirect evidence “Misión En todas sus áreas de negocios, SCHWAGER proveerá servicios y bienes de excelencia, ofreciendo, confianza y credibilidad a nuestros clientes, colaboradores y accionistas…” Source: RevenueBase Database · checked Sep 22, 2026
25	Ricardo PLC	Indirect evidence	London, United KingdomHQ checked Sep 22, 2026	1,001-5,000	670 contacts →
	Indirect evidence “Click the 'Follow' button and explore careers at Ricardo on our 'Jobs' and 'Life' tabs and at careers.ricardo.com.” Source: RevenueBase Database · checked Sep 22, 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: sustainable development 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 sustainable development firms.
Partial evidence: Its own public description names part of sustainable development firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name sustainable development 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 26,262 sustainable development firms worldwide

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Sustainable development firms worldwide at a glance

As of Sep 22, 2026

27.5%Verified-email coverage

12.4Average contacts per company

1-10Median size (employees)

1.6%Largest-city concentration · London

Sep 22, 2026Page data refreshed

Companies by employee count

1-10

17,325

11-50

6,762

51-200

1,502

201-500

354

501-1,000

114

1,001-5,000

5,001-10,000

10001+

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 sustainable development 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 sustainable development firms are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “sustainable development 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 sustainable development 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 sustainable development 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, 89,778 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 22, 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.

Sustainable development firms by location

119 lists · largest first

Every Sustainable development 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 sustainable development 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 sustainable development firms are there worldwide?

RevenueBase identified 26,262 sustainable development 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?

Worley, headquartered in Sydney, tops this list with the largest team on record.

Which country has the most sustainable development firms?

Brazil leads with 2,357 companies, followed by the United States (1,649) and France (1,369). Every sustainable development firms list by country and city is linked on this page.

Which city has the most sustainable development firms?

London leads with 409 headquartered companies, followed by Sao Paulo (360) and Paris (270).

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 89,778 verified decision-maker contacts tracked across these 26,262 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 22, 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.