Company lists · Data refreshed September 2026

Top 25 Environmental consulting firms based in Switzerland

Name: Environmental consulting firms based in Switzerland
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 2, 2026 274 companies tracked

RevenueBase identified 274 environmental consulting firms headquartered in Switzerland as of September 2026 and tracks 2,742 professional contacts across them, including 1,124 with verified work emails and 100 with mobile numbers. Zurich is the largest hub.

This list covers environmental consulting firms headquartered in Switzerland, 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 2, 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 RevenueBase Smart Search rating on every row Refreshed Sep 2, 2026 86% judged on-target in blind review

274Companies

2,742Contacts tracked

1,124Verified emails

100Mobile numbers

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The 25 largest environmental consulting firms based in Switzerland

Ranked by team size

Top 25 of 274 environmental consulting firms based in Switzerland, ranked by team size, largest first. Data refreshed Sep 2, 2026. RevenueBase Smart Search rates how each company's information relates to environmental 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	Quantis	Partial evidence	Lausanne, Switzerland	201-500	332 contacts →
	Partial evidence “Quantis, part of BCG, is a sustainability consulting firm that helps organizations translate sustainability ambition into measurable business value.” Source: RevenueBase Database · checked Sep 2, 2026
2	Holinger	Indirect evidence	Liestal Basel, Switzerland	501-1,000	264 contacts →
	Indirect evidence “For over 90 years, HOLINGER has been solving engineering and scientific tasks in various specialist areas related to the water cycle.” Source: RevenueBase Database · checked Sep 2, 2026
3	Jauslin Stebler AG	Indirect evidence	Zurich, Switzerland	51-200	108 contacts →
	Indirect evidence “Die komplexen Rahmenbedingungen erfordern eine ganzheitliche Sicht der Probleme, kreative Prozesse und eine entsprechend eingespielte Organisation.” Source: RevenueBase Database · checked Sep 2, 2026
4	ENG In Technologies	Indirect evidence	Geneve, Switzerland	51-200	87 contacts →
	Indirect evidence “Welcome to ’, where innovation meets human commitment.” Source: RevenueBase Database · checked Sep 2, 2026
5	Gartenmann Engineering AG	Indirect evidence	Zurich, Switzerland	51-200	72 contacts →
	Indirect evidence “Wir sind ein Team von Spezialingenieuren/innen und Berater/innen.” Source: RevenueBase Database · checked Sep 2, 2026
6	Econetta	Indirect evidence	Schlieren, Switzerland	51-200	56 contacts →
	Indirect evidence “Econetta ist ein führendes Schweizer Umweltberatungsunternehmen.” Source: RevenueBase Database · checked Sep 2, 2026
7	Biol Conseils	Indirect evidence	Neuchatel, Switzerland	11-50	54 contacts →
	Indirect evidence “Fondé en 1985, biol conseils regroupe des ingénieurs de formations complémentaires dans les domaines de l’environnement et de l’aide à la décision.” Source: RevenueBase Database · checked Sep 2, 2026
8	DE Cérenville Géotechnique SA	Indirect evidence	Geneve, Switzerland	51-200	46 contacts →
	Indirect evidence “De Cérenville Géotechnique regroupe sous une même entité un bureau d’ingénieurs-conseils (ICOS) et un service d’essais et mesures (SEM), tous deux spécialisés dans les domaines de…” Source: RevenueBase Database · checked Sep 2, 2026
9	Ecosens AG	Indirect evidence	Wallisellen, Switzerland	51-200	41 contacts →
	Indirect evidence “Langjährige Erfahrung und Nähe zu aktuellen Entwicklungen in sämtlichen umweltrelevanten Fragestellungen machen Ecosens zum führenden Beratungsunternehmen.” Source: RevenueBase Database · checked Sep 2, 2026
10	Sbis AG	Strong evidence	Geneve, Switzerland	51-200	40 contacts →
	Strong evidence “The purpose of the company is independent consulting and planning as well as expert activities in the field of safety, in particular occupational safety, environmental protection…” Source: RevenueBase Database · checked Sep 2, 2026
11	Prona Romandie SA	Partial evidence	Fribourg, Switzerland	11-50	37 contacts →
	Partial evidence “Prona Romandie SA provides environmental engineering and health and safety services.” Source: RevenueBase Database · checked Sep 2, 2026
12	Jäckli Geologie AG	Indirect evidence	Zurich, Switzerland	51-200	36 contacts →
	Indirect evidence “Die Jäckli Geologie AG ist ein eigenständiges Schweizer Beratungsunternehmen mit verschiedenen Standorten in der Nord- und Zentralschweiz.” Source: RevenueBase Database · checked Sep 2, 2026
13	Ecotec Environnement SA	Partial evidence	Geneve, Switzerland	11-50	33 contacts →
	Partial evidence “ECOTEC Environnement SA is a renewables and environment company based out of Rue Francois-Ruchon 3, Geneve, Geneve, Switzerland.” Source: RevenueBase Database · checked Sep 2, 2026
14	HSE Conseils SA	Indirect evidence	Gland, Switzerland	11-50	31 contacts →
	Indirect evidence “Nous accompagnons les acteurs de la construction et de l’immobilier dans la gestion des polluants, la sécurité et la préservation de l’environnement.” Source: RevenueBase Database · checked Sep 2, 2026
15	Friedlipartner AG	Indirect evidence	Buchrain, Switzerland	11-50	27 contacts →
	Indirect evidence “Wir beraten seit 1974 Bauherren und Planer in allen Fragen rund um den Baugrund.” Source: RevenueBase Database · checked Sep 2, 2026
16	EFP AG	Indirect evidence	Regensdorf, Switzerland	11-50	26 contacts →
	Indirect evidence “EFP AG Ingenieure Planer Geometer setzen sich für zukunftsgerichtete Ingenieurlösungen ein, die den Bedürfnissen der Nutzerinnen und Nutzer genauso verpflichtet sind wie einem…” Source: RevenueBase Database · checked Sep 2, 2026
17	Cement Engineering SA Cesa	Indirect evidence	Carouge, Switzerland	11-50	24 contacts →
	Indirect evidence “Cement Engineering SA (CESA) Engineering is a professionals business!” Source: RevenueBase Database · checked Sep 2, 2026
18	Planikum AG	Indirect evidence	Zurich, Switzerland	11-50	23 contacts →
	Indirect evidence “planikum gestaltet zukunftsorientierte Lebensräume und Infrastrukturen für Stadt und Land.” Source: RevenueBase Database · checked Sep 2, 2026
19	Sieber Cassina Partner AG	Indirect evidence	Winterthur, Switzerland	11-50	23 contacts →
	Indirect evidence “Unsere Dienstleistungen stehen oft im Spannungsfeld von Nutzungs- und Schutzinteressen.” Source: RevenueBase Database · checked Sep 2, 2026
20	Bachema AG	Indirect evidence	Schlieren, Switzerland	51-200	22 contacts →
	Indirect evidence “Wir bieten schnelle, verlässliche und unabhängige Umweltanalytik auf hohem technisch-wissenschaftlichem Niveau an, damit Sie fundierte Entscheidungen treffen und ihre Kunden…” Source: RevenueBase Database · checked Sep 2, 2026
21	SB Technique SA	Indirect evidence	Geneve, Switzerland	11-50	18 contacts →
	Indirect evidence “SB technique est un bureau d'Ingénieur Conseil en chauffage, ventilation, climatisation et sécurité du bâtiment développant des concepts énergétiques ambitieux pour des…” Source: RevenueBase Database · checked Sep 2, 2026
22	WSP Suisse AG	Indirect evidence	Luzern, Switzerland	201-500	18 contacts →
	Indirect evidence “Seit über 130 Jahren wächst WSP kontinuierlich und ist heute auf der ganzen Welt vertreten.” Source: RevenueBase Database · checked Sep 2, 2026
23	Ingenias AG	Indirect evidence	St. Gallen, Switzerland	11-50	18 contacts →
	Indirect evidence “Ingenias ist Ihr Umwelt-Ingenieurbüro für anspruchsvolle Aufgaben in den Bereichen Umwelt, Wasser und Geologie.” Source: RevenueBase Database · checked Sep 2, 2026
24	Natura Biologie Appliquée SA	Indirect evidence	Oron-La-Ville, Switzerland	11-50	16 contacts →
	Indirect evidence “Ingénierie de l’environnement du diagnostic à la réalisation” Source: RevenueBase Database · checked Sep 2, 2026
25	Adolf Krebs AG	Indirect evidence	Grund Bei Gstaad, Switzerland	51-200	16 contacts →
	Indirect evidence “Aber ebenso viel mit harten Kalkulationen, Energiemanagement, mit Wissen, was zu tun ist.” Source: RevenueBase Database · checked Sep 2, 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: environmental 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 environmental consulting firms.
Partial evidence: Its own public description names part of environmental consulting firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name environmental 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 274 environmental consulting firms based in Switzerland

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Environmental consulting firms based in Switzerland at a glance

As of Sep 2, 2026

41.0%Verified-email coverage

3.6%Mobile-number coverage

10.0Average contacts per company

1-10Median size (employees)

7.7%Largest-city concentration · Zurich

Sep 2, 2026Page data refreshed

Companies by employee count

1-10

183

11-50

51-200

201-500

501-1,000

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 environmental 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 Switzerland whose own description of what they do matches “environmental 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 environmental 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 environmental consulting firms, and records with no verified work email. Companies headquartered outside Switzerland 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, 1,124 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 2, 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.

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 environmental 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 environmental consulting firms are there based in Switzerland?

RevenueBase identified 274 environmental consulting firms headquartered in Switzerland 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?

Quantis, headquartered in Lausanne, tops this list with the largest team on record.

Which city has the most environmental consulting firms?

Zurich leads with 21 headquartered companies, followed by Geneve (12) and Lausanne (10).

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 1,124 verified decision-maker contacts tracked across these 274 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 2, 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.