Company lists · Data refreshed September 2026

Top 25 Hydrogeological consulting firms based in Switzerland

RevenueBase identified 148 hydrogeological consulting firms headquartered in Switzerland as of September 2026 and tracks 1,159 professional contacts across them, including 399 with verified work emails and 23 with mobile numbers. Zurich is the largest hub.

This list covers hydrogeological 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, how directly it supports the match, and when it was last checked. Data refreshed September 3, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, 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 Match evidence on every row Refreshed Sep 3, 2026 86% judged on-target in blind review
148Companies
1,159Contacts tracked
399Verified emails
23Mobile numbers
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The 25 largest hydrogeological consulting firms based in Switzerland

Ranked by team size
Top 25 of 148 hydrogeological consulting firms based in Switzerland, ranked by team size, largest first. Data refreshed Sep 3, 2026. Evidence rates how directly each company's own description names hydrogeological consulting firms: strong (names it), partial (names part of it), indirect (matched on its full profile rather than the summary shown). Click a count to unlock that company's people.
#CompanyHeadquartersEmployeesContacts
1
AB Ingénieurs SAIndirect evidence
Thônex, SwitzerlandHQ checked Sep 3, 202651-20062

“Fondé en 1979, le bureau Pierre Amsler était spécialisé dans les études géotechniques et les travaux spéciaux dès sa création.”

Source: company website · checked Sep 3, 2026
2Chavannes-près-renens, SwitzerlandHQ checked Sep 3, 202651-20046

“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: company website · checked Sep 3, 2026
3
Jäckli Geologie AGIndirect evidence
8048 Zürich, SwitzerlandHQ checked Sep 3, 202651-20036

“Die Jäckli Geologie AG ist ein eigenständiges Schweizer Beratungsunternehmen mit verschiedenen Standorten in der Nord- und Zentralschweiz.”

Source: company website · checked Sep 3, 2026
4
Ryser Ingenieure AGIndirect evidence
SwitzerlandHQ checked Sep 3, 202611-5028

“Wir sind eine eigenständige Ingenieurunternehmung für Planung, Beratung und Realisierung mit Schwergewicht im Siedlungswasserbau.”

Source: company website · checked Sep 3, 2026
5
Friedlipartner AGIndirect evidence
Zurich, SwitzerlandHQ checked Sep 3, 202611-5027

“Wir beraten seit 1974 Bauherren und Planer in allen Fragen rund um den Baugrund.”

Source: company website · checked Sep 3, 2026
6
EFP AGIndirect evidence
Regensdorf, SwitzerlandHQ checked Sep 3, 202611-5026

“EFP AG Ingenieure Planer Geometer setzen sich für zukunftsgerichtete Ingenieurlösungen ein, die den Bedürfnissen der Nutzerinnen und Nutzer genauso verpflichtet sind wie einem…”

Source: company website · checked Sep 3, 2026
7
Cement Engineering SA CesaIndirect evidence
Carouge, SwitzerlandHQ checked Sep 3, 202611-5024

“Cement Engineering SA (CESA) Engineering is a professionals business!”

Source: company website · checked Sep 3, 2026
8
Sieber Cassina Partner AGIndirect evidence
Zurich, SwitzerlandHQ checked Sep 3, 202611-5023

“Unsere Dienstleistungen stehen oft im Spannungsfeld von Nutzungs- und Schutzinteressen.”

Source: company website · checked Sep 3, 2026
9
Kuster Hager GruppeIndirect evidence
Uznach, SwitzerlandHQ checked Sep 3, 202651-20023

“GEBÜNDELTES FACHWISSEN FÜR BAU, WASSER UND UMWELT Unter aktivem Einsatz der zweiten und dritten Generation der Inhaberfamilie bietet die KUSTER+HAGER Gruppe dank ihren…”

Source: company website · checked Sep 3, 2026
10
Hydrique EngineersIndirect evidence
Le Mont Sur Lausanne, SwitzerlandHQ checked Sep 3, 202611-5019

“OUR HISTORY Hydrique Ingénieurs was founded in 2006 by two civil engineers, both passionate about water and energy domains.”

Source: company website · checked Sep 3, 2026
11
Ingenias AGIndirect evidence
Weinfelden, SwitzerlandHQ checked Sep 3, 202611-5018

“Ingenias ist Ihr Umwelt-Ingenieurbüro für anspruchsvolle Aufgaben in den Bereichen Umwelt, Wasser und Geologie.”

Source: company website · checked Sep 3, 2026
12
K. Lienhard AGIndirect evidence
Buchs, SwitzerlandHQ checked Sep 3, 202611-5017

“K.”

Source: company website · checked Sep 3, 2026
13Lausanne, SwitzerlandHQ checked Sep 3, 202611-5017

“Depuis 1960, nous proposons des prestations de conseil en matière de géologie de l’ingénieur et d’hydrogéologie technique.”

Source: company website · checked Sep 3, 2026
14
Flussbau AG SAHIndirect evidence
Zürich + Bern, SwitzerlandHQ checked Sep 3, 202611-5016

“DE] Das Ingenieurbüro Flussbau AG SAH bearbeitet seit 1993 mit viel Fachwissen und grossem Engagement Projekte und Studien in den Bereichen Fluss- und Wasserbau.”

Source: company website · checked Sep 3, 2026
15
Gruner Stucky LTDIndirect evidence
Renens, SwitzerlandHQ checked Sep 3, 20261,001-5,00016

“Gruner Stucky Ltd (formerly Stucky Ltd) is amongst the world leaders in design both for construction and rehabilitation of dam & hydropower schemes.”

Source: company website · checked Sep 3, 2026
16
Waldburger Ingenieure AGIndirect evidence
Aarau, SwitzerlandHQ checked Sep 3, 202611-5016

“For more than 100 years, Waldburger Ingenieure AG and its predecessor companies have been heavily involved in urban water management.”

Source: company website · checked Sep 3, 2026
17
Triform SAIndirect evidence
Fribourg, SwitzerlandHQ checked Sep 3, 202611-5013

“Depuis 1991, Triform SA accompagne les acteurs publics et privés dans la réussite de leurs projets liés à l’eau.”

Source: company website · checked Sep 3, 2026
18
Hunziker, Zarn & Partner AGIndirect evidence
Aarau, SwitzerlandHQ checked Sep 3, 202611-5012

“Ingenieurbüro für Fluss- und Wasserbau”

Source: company website · checked Sep 3, 2026
19Cointrin, SwitzerlandHQ checked Sep 3, 202611-5012

“Geos Ingénieurs-Conseils SA est un bureau d'ingénieurs conseils spécialisés en génie civil, structures, géotechnique, hydraulique et environnement.”

Source: company website · checked Sep 3, 2026
20
Kellerhals Haefeli AGIndirect evidence
Bern, SwitzerlandHQ checked Sep 3, 202611-5012

“Willkommen!”

Source: company website · checked Sep 3, 2026
21
Geotechnisches Institut AGIndirect evidence
Bern, SwitzerlandHQ checked Sep 3, 202611-5012

“Wir sind ein unabhängiges Dienstleistungs- und Beratungsunternehmen und arbeiten für Sie in den folgenden Bereichen- Geologie und Geotechnik - Altlasten, Bauschadstoffe und…”

Source: company website · checked Sep 3, 2026
22
Niederer Pozzi Umwelt AGIndirect evidence
Uznach, SwitzerlandHQ checked Sep 3, 202611-5011

“Seit über 35 Jahren erbringen wir schweizweit sowie im Ausland kompetente Ingenieurdienstleistungen in den Fachbereichen- Flussbau und Hochwasserschutz - Naturgefahren und…”

Source: company website · checked Sep 3, 2026
23
Idealp SAIndirect evidence
Sion, SwitzerlandHQ checked Sep 3, 202611-5010

“Le bureau IDEALP a été formé en juin 2001 par 2 associés, Philippe Bianco et François Genolet.”

Source: company website · checked Sep 3, 2026
24
Grund- UND Tiefbau AG BaselIndirect evidence
Basel, SwitzerlandHQ checked Sep 3, 202611-509

“Als Spezialisten mit vielfältiger Erfahrung in noch so heiklen und komplexen Herausforderungen beraten wir Sie kompetent und individuell.”

Source: company website · checked Sep 3, 2026
25
RLJ Ingénieurs Conseils SAIndirect evidence
SwitzerlandHQ checked Sep 3, 202611-509

“Le bureau r l j.”

Source: company website · checked Sep 3, 2026

Showing 25 of 148 hydrogeological consulting firms based in Switzerland

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Hydrogeological consulting firms based in Switzerland at a glance

As of Sep 3, 2026
1-10Median size (employees)
ZurichLargest hub · 11 HQs
23Contacts with mobile numbers
Sep 3, 2026Data refreshed

Companies by employee count

1-10
88
11-50
51
51-200
5
201-500
2
1,001-5,000
1

Verified emails by last verification

0–30
0
31–60
40
61–90
226
90–180
133
180+
0

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 hydrogeological consulting firms, so some rows will be adjacent to the category rather than pure plays. The description and evidence 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 SmartSearch, the natural-language company search available to every RevenueBase user.
What qualifies
Companies headquartered in Switzerland whose own description of what they do matches “hydrogeological consulting firms”. Matching reads each company's description, not its industry code or its name.
What we exclude
Companies whose own description does not clearly place them among hydrogeological 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 an evidence 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, 399 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 3, 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

How many hydrogeological consulting firms are there based in Switzerland?

RevenueBase identified 148 hydrogeological 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?

AB Ingénieurs SA, headquartered in Fribourg, tops this list with the largest team on record.

Which city has the most hydrogeological consulting firms?

Zurich leads with 11 headquartered companies, followed by Lausanne (7) and St. Gallen (6).

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 399 verified decision-maker contacts tracked across these 148 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 3, 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 SmartSearch, 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.