Company lists · Data refreshed September 2026

Top 25 Environmental engineering staffing companies based in Switzerland

Name: Environmental engineering staffing companies based in Switzerland
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 28, 2026 236 companies tracked

RevenueBase identified 236 environmental engineering staffing companies headquartered in Switzerland as of September 2026 and tracks 4,330 professional contacts across them, including 1,911 with verified work emails. Zurich is the largest hub.

This list covers environmental engineering staffing companies 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 28, 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 28, 2026 86% judged on-target in blind review

236Companies

4,330Contacts tracked

1,911Verified emails

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The 25 largest environmental engineering staffing companies based in Switzerland

Ranked by team size

Top 25 of 236 environmental engineering staffing companies based in Switzerland, ranked by team size, largest first. Data refreshed Sep 28, 2026. RevenueBase Smart Search rates how each company's information relates to environmental engineering staffing companies: 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	Amstein Walthert	Indirect evidence	Zurich, SwitzerlandHQ checked Sep 28, 2026	1,001-5,000	563 contacts →
	Indirect evidence “Ü Ingenieurskunst bedeutet, mit Ressourcen richtig umzugehen.” Source: RevenueBase Database · checked Sep 28, 2026
2	Gruner	Indirect evidence	Basel, SwitzerlandHQ checked Sep 28, 2026	1,001-5,000	462 contacts →
	Indirect evidence “Gruner at a glance Founded: 1862 in Basel, Switzerland Legal form: Since 1970, public limited company owned by the founding families and employees Employees: more than 1,200 from…” Source: RevenueBase Database · checked Sep 28, 2026
3	Holinger	Partial evidence	Liestal, SwitzerlandHQ checked Sep 28, 2026	501-1,000	265 contacts →
	Partial 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 28, 2026
4	Capefront Energies	Indirect evidence	Carouge, SwitzerlandHQ checked Sep 28, 2026	201-500	190 contacts →
	Indirect evidence “Capefront Energies: A Global Leader in the Energy Industry Capefront Energies is a prominent global leader in the energy industry, dedicated to delivering top-tier recruitment…” Source: RevenueBase Database · checked Sep 28, 2026
5	Bellini	Indirect evidence	Zürich, SwitzerlandHQ checked Sep 28, 2026	51-200	96 contacts →
	Indirect evidence “Wir sind die Spezialisten wenn es um den Personalverleih im Baugewerbe geht.” Source: RevenueBase Database · checked Sep 28, 2026
6	Joker Personal AG	Indirect evidence	Affoltern Am Albis, SwitzerlandHQ checked Sep 28, 2026	n/a	75 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 28, 2026
7	SD Ingénierie	Indirect evidence	Suisse-romande, SwitzerlandHQ checked Sep 28, 2026	51-200	69 contacts →
	Indirect evidence “Fondée en 1955 à Lausanne, sd ingénierie se compose aujourd’hui d’environ 180 collaborateurs répartis au sein de sept filiales cantonales.” Source: RevenueBase Database · checked Sep 28, 2026
8	Ecoservices	Indirect evidence	Carouge, SwitzerlandHQ checked Sep 28, 2026	11-50	47 contacts →
	Indirect evidence “Ecoservices SA offre des prestations d'ingénierie dans les domaines de l'environnement, de la santé-sécurité au travail et de l'amiante.” Source: RevenueBase Database · checked Sep 28, 2026
9	Suisseplan	Indirect evidence	Aarau Luzern Wohlen Zürich, SwitzerlandHQ checked Sep 28, 2026	51-200	44 contacts →
	Indirect evidence “Mit unseren Entwicklungs, Planungs- und Gestaltungskompetenzen formen wir den Lebensraum so, dass sich die Menschen darin sicher und wohl fühlen.” Source: RevenueBase Database · checked Sep 28, 2026
10	Workmanagement AG	Indirect evidence	Rapperswil, SwitzerlandHQ checked Sep 28, 2026	51-200	43 contacts →
	Indirect evidence “Die Beratung und Vermittlung von Stellensuchenden im Temporär- und Dauerstellenbereich in den Sparten Technik & Industrie, Bau, Büro und Informatik ist seit über 45 Jahren unsere…” Source: RevenueBase Database · checked Sep 28, 2026
11	PZM AG	Indirect evidence	Zürich, SwitzerlandHQ checked Sep 28, 2026	51-200	43 contacts →
	Indirect evidence “Ingenieure für Gebäudetechnik mit über 100 Mitarbeiterinnen und Mitarbeiter.” Source: RevenueBase Database · checked Sep 28, 2026
12	Work Selection	Indirect evidence	Rotkreuz, SwitzerlandHQ checked Sep 28, 2026	11-50	40 contacts →
	Indirect evidence “We bring people and companies together!” Source: RevenueBase Database · checked Sep 28, 2026
13	Prona Romandie SA	Strong evidence	Yverdon-les-bains, SwitzerlandHQ checked Sep 28, 2026	11-50	37 contacts →
	Strong evidence “Prona Romandie SA provides environmental engineering and health and safety services.” Source: RevenueBase Database · checked Sep 28, 2026
14	Point Service SA	Indirect evidence	Balerna, SwitzerlandHQ checked Sep 28, 2026	201-500	36 contacts →
	Indirect evidence “Vi capita mai di non trovare la persona perfetta per la vostra necessità, o di perdere molto tempo nella selezione e gestione di personale?” Source: RevenueBase Database · checked Sep 28, 2026
15	Keyplacement	Indirect evidence	Carouge, SwitzerlandHQ checked Sep 28, 2026	n/a	36 contacts →
	Indirect evidence “Key Placement est une agence de placement de personnel fixe et temporaire depuis Janvier 2013 bien implantée dans le domaine du médical mais qui déploie également ses activités…” Source: RevenueBase Database · checked Sep 28, 2026
16	Colibri People AG	Indirect evidence	Schlieren, SwitzerlandHQ checked Sep 28, 2026	201-500	33 contacts →
	Indirect evidence “colibri people ist seit über zehn Jahren erfolgreich in der Personalvermittlung und im Personalverleih tätig.” Source: RevenueBase Database · checked Sep 28, 2026
17	Peko AG	Indirect evidence	Zurzach, SwitzerlandHQ checked Sep 28, 2026	201-500	32 contacts →
	Indirect evidence “Peko AG in Bad Zurzach ist seit 1981 ein zuverlässiger Partner von Unternehmen im Bahn, Energie- und Industriesektor.” Source: RevenueBase Database · checked Sep 28, 2026
18	Skilled Recruitment Solutions Gmbh	Indirect evidence	Basel, SwitzerlandHQ checked Sep 28, 2026	11-50	29 contacts →
	Indirect evidence “At Skilled Recruitment Solutions we strive for transparency within the Swiss labor market for our candidates and clients.” Source: RevenueBase Database · checked Sep 28, 2026
19	Collardi	Partial evidence	Luzern, SwitzerlandHQ checked Sep 28, 2026	51-200	29 contacts →
	Partial evidence “collardi is one of the leading staffing companies for technical jobs in the construction and industrial sectors.” Source: RevenueBase Database · checked Sep 28, 2026
20	Ryser Ingenieure AG	Indirect evidence	Bern, SwitzerlandHQ checked Sep 28, 2026	11-50	28 contacts →
	Indirect evidence “Wir sind eine eigenständige Ingenieurunternehmung für Planung, Beratung und Realisierung mit Schwergewicht im Siedlungswasserbau.” Source: RevenueBase Database · checked Sep 28, 2026
21	B S Ingenieurs SA	Indirect evidence	Genève, SwitzerlandHQ checked Sep 28, 2026	11-50	27 contacts →
	Indirect evidence “B+S INGENIEURS SA est composé de 37 collaborateurs bénéficiant de compétences élargies dans les domaines de l’ingénierie structurale (structures porteuses et ouvrages d’art), du…” Source: RevenueBase Database · checked Sep 28, 2026
22	Flückiger Bosshard AG	Indirect evidence	Zürich, SwitzerlandHQ checked Sep 28, 2026	51-200	27 contacts →
	Indirect evidence “Die Tradition der Flückiger + Bosshard AG, als Teil einer innovativen, leistungsstarken und unabhängigen Ingenieurgruppe im Ingenieurbau reicht zurück bis ins Jahr 1964.” Source: RevenueBase Database · checked Sep 28, 2026
23	Mauler SA	Indirect evidence	Neuchâtel, SwitzerlandHQ checked Sep 28, 2026	11-50	26 contacts →
	Indirect evidence “Mauler SA, bureau d’ingénierie civile et environnementale établi depuis 1950 à Neuchâtel, est spécialisé dans la planification, la conception et la réalisation de projets, il…” Source: RevenueBase Database · checked Sep 28, 2026
24	EFP AG	Indirect evidence	Regensdorf, SwitzerlandHQ checked Sep 28, 2026	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 28, 2026
25	Induserv AG	Indirect evidence	Basel, SwitzerlandHQ checked Sep 28, 2026	501-1,000	26 contacts →
	Indirect evidence “Wir sind eine Gruppe von Personalberatern, die sich ganz bewusst auf das Erbringen von Personaldienstleistungen in ausgewählten Fachbereichen konzentriert.” Source: RevenueBase Database · checked Sep 28, 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 engineering staffing companies. 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 engineering staffing companies.
Partial evidence: Its own public description names part of environmental engineering staffing companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name environmental engineering staffing companies. 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 236 environmental engineering staffing companies based in Switzerland

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Environmental engineering staffing companies based in Switzerland at a glance

As of Sep 28, 2026

44.1%Verified-email coverage

18.3Average contacts per company

1-10Median size (employees)

9.3%Largest-city concentration · Zurich

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

134

11-50

51-200

201-500

501-1,000

1,001-5,000

10001+

Email recency for this list is measured worldwide rather than for Switzerland, so it is reported there. Company counts and contact totals on this page are exact for Switzerland, over 236 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 environmental engineering staffing companies, 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 engineering staffing companies”. 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 engineering staffing companies), 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 engineering staffing companies, 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, 1,911 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.

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 engineering staffing companies, 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 engineering staffing companies are there based in Switzerland?

RevenueBase identified 236 environmental engineering staffing companies 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?

Amstein Walthert, headquartered in Zurich, tops this list with the largest team on record.

Which city has the most environmental engineering staffing companies?

Zurich leads with 22 headquartered companies, followed by Lausanne (10) and Geneve (9).

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 1,911 verified decision-maker contacts tracked across these 236 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.