Company lists · Data verified August 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 Verified Aug 28, 2026 274 companies tracked

There are 274 environmental consulting firms headquartered in Switzerland (RevenueBase, August 2026). RevenueBase 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. Data current as of August 28, 2026.

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 verified Aug 28, 2026. Click a count to unlock that company's people.
#	Company	HQ	Employees	Contacts	Verified emails
1	Quantis	Lausanne	201-500	332	187
2	Holinger	Liestal Basel	501-1,000	264	150
3	Jauslin Stebler AG	Zurich	51-200	108	8
4	ENG In Technologies	Geneve	51-200	87	36
5	Gartenmann Engineering AG	Zurich	51-200	72	43
6	Econetta	Schlieren	51-200	56	34
7	Biol Conseils	Neuchatel	11-50	54	33
8	DE Cérenville Géotechnique SA	Geneve	51-200	46	22
9	Ecosens AG	Wallisellen	51-200	41	31
10	Sbis AG	Geneve	51-200	40	22
11	Prona Romandie SA	Fribourg	11-50	37	24
12	Jäckli Geologie AG	Zurich	51-200	36	26
13	Ecotec Environnement SA	Geneve	11-50	33	17
14	HSE Conseils SA	Gland	11-50	31	23
15	Friedlipartner AG	Buchrain	11-50	27	16
16	EFP AG	Regensdorf	11-50	26	13
17	Cement Engineering SA Cesa	Carouge	11-50	24	1
18	Planikum AG	Zurich	11-50	23	18
19	Sieber Cassina Partner AG	Winterthur	11-50	23	17
20	Bachema AG	Schlieren	51-200	22	9
21	SB Technique SA	Geneve	11-50	18	10
22	WSP Suisse AG	Luzern	201-500	18	9
23	Ingenias AG	St. Gallen	11-50	18	8
24	Natura Biologie Appliquée SA	Oron-La-Ville	11-50	16	9
25	Adolf Krebs AG	Grund Bei Gstaad	51-200	16	6

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 Aug 28, 2026

1-10Median size (employees)

ZurichLargest hub · 21 HQs

100Contacts with mobile numbers

0Emails re-verified in last 30 days

Companies by employee count

1-10

183

11-50

51-200

201-500

501-1,000

Environmental consulting firms by metro

Metro	Companies
Environmental consulting firms in Zurich	21
Environmental consulting firms in Geneve	12
Environmental consulting firms in Lausanne	10
Environmental consulting firms in Bern	9
Environmental consulting firms in Basel	8
Environmental consulting firms in Geneva	6
Environmental consulting firms in Lugano	5

How this list was built

Source: The RevenueBase company graph: 21.3 million companies and 398.9 million professional contacts resolved from primary sources.
Inclusion: Companies whose own business descriptions match “environmental consulting firms”, with match quality audited by blind human judging, and headquartered in Switzerland.
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: Contact records re-verify on a rolling cadence; 0 contacts on this list were re-verified in the last 30 days.
Refresh: Lists are refreshed periodically as the underlying company graph is re-verified. Last verified Aug 28, 2026.

Frequently asked

How many environmental consulting firms are there based in Switzerland?

There are 274 environmental consulting firms headquartered in Switzerland as of August 2026 (RevenueBase).

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 is refreshed periodically as the underlying company graph is re-verified. It was last verified on August 28, 2026.

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About this data

RevenueBase is a B2B contact data platform. Its company graph covers 21.3 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, the same data that powers RevenueBase's B2B data products and the free research portal.