Company lists · Data refreshed September 2026

Top 25 Tunneling contractors based in Switzerland

Name: Tunneling contractors based in Switzerland
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 19, 2026 78 companies tracked

RevenueBase identified 78 tunneling contractors headquartered in Switzerland as of September 2026 and tracks 4,156 professional contacts across them, including 1,786 with verified work emails. Zurich is the largest hub.

This list covers tunneling contractors 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 19, 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 19, 2026 86% judged on-target in blind review

78Companies

4,156Contacts tracked

1,786Verified emails

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The 25 largest tunneling contractors based in Switzerland

Ranked by team size

Top 25 of 78 tunneling contractors based in Switzerland, ranked by team size, largest first. Data refreshed Sep 19, 2026. RevenueBase Smart Search rates how each company's information relates to tunneling contractors: 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	Implenia	Indirect evidence	Opfikon, SwitzerlandHQ checked Sep 19, 2026	5,001-10,000	3,050 contacts →
	Indirect evidence “As Switzerland’s leading construction and real estate service provider, Implenia develops, builds and manages homes, workplaces and infrastructure for future generations in…” Source: RevenueBase Database · checked Sep 19, 2026
2	Pizzarotti SA	Indirect evidence	Bellinzona, SwitzerlandHQ checked Sep 19, 2026	51-200	120 contacts →
	Indirect evidence “Impresa di costruzioni attiva in tutto il territorio elvetico nella realizzazione di infrastrutture stradali e ferroviarie, scavi per tunnel e lavori sotterranei, edilizia civile…” Source: RevenueBase Database · checked Sep 19, 2026
3	Rothpletz, Lienhard CIE AG Bauingenieure & Bauunternehmung	Indirect evidence	Aarau, SwitzerlandHQ checked Sep 19, 2026	51-200	69 contacts →
	Indirect evidence “Bauunternehmung und Ingenieurbüro unter einem Dach Als einzige Schweizer Unternehmung verbinden wir seit 1918 Planung und Ausführung im Bauwesen.” Source: RevenueBase Database · checked Sep 19, 2026
4	Locher Ingenieure	Indirect evidence	Stadtkreis 1 Altstadt, SwitzerlandHQ checked Sep 19, 2026	51-200	67 contacts →
	Indirect evidence “In der Bearbeitung von interdisziplinären Grossprojekten bis zu kleinen «Eine-Person-Projekten» bietet Locher Ingenieure das ideale Umfeld.” Source: RevenueBase Database · checked Sep 19, 2026
5	Renesco	Indirect evidence	Moosseedorf, SwitzerlandHQ checked Sep 19, 2026	501-1,000	60 contacts →
	Indirect evidence “WATERPROOFING Our specialized division for all kind of sealing operations in underground structures against pressurized and non-pressurized water.” Source: RevenueBase Database · checked Sep 19, 2026
6	Infra Tunnel SA	Indirect evidence	Marin-epagnier, SwitzerlandHQ checked Sep 19, 2026	51-200	47 contacts →
	Indirect evidence “Infra Tunnel construit et réhabilite des ouvrages souterrains d'infrastructures, hydrauliques, et industriels, dans toute la Suisse.” Source: RevenueBase Database · checked Sep 19, 2026
7	Bächtold & Moor Ag, Ingenieur- UND Umweltleistungen	Indirect evidence	Bern, SwitzerlandHQ checked Sep 19, 2026	51-200	46 contacts →
	Indirect evidence “Seit über 50 Jahren bieten wir die unterschiedlichsten Planungs- und Projektierungsarbeiten in den Bereichen konstruktiver Ingenieurbau, Tunnelbau/Geotechnik, Raum und Umwelt…” Source: RevenueBase Database · checked Sep 19, 2026
8	ILF Consulting Engineers In Switzerland	Indirect evidence	Zurich, SwitzerlandHQ checked Sep 19, 2026	51-200	37 contacts →
	Indirect evidence “Die ILF Schweiz ist ein Ingenieur- und Beratungsunternehmen und Teil der international tätigen ILF-Holding.” Source: RevenueBase Database · checked Sep 19, 2026
9	GVH Ingénieurs Civils EPF SIA	Indirect evidence	Tramelan, SwitzerlandHQ checked Sep 19, 2026	51-200	31 contacts →
	Indirect evidence “Le Groupe GVH est un groupement de bureaux d'ingénieurs offrant les prestations de conception, de réalisation d'ouvrage, et de conseils en matière technique dans le domaine du…” Source: RevenueBase Database · checked Sep 19, 2026
10	Isen Tiefbau AG	Indirect evidence	Otelfingen, SwitzerlandHQ checked Sep 19, 2026	201-500	30 contacts →
	Indirect evidence “DIE ISEN TIEFBAU AG WURDE 1991 ALS TIEFBAUUNTERNEHMEN MIT 4 ANGESTELLTEN GEGRÜNDET.” Source: RevenueBase Database · checked Sep 19, 2026
11	Praderlosinger SA	Indirect evidence	Sion, SwitzerlandHQ checked Sep 19, 2026	201-500	28 contacts →
	Indirect evidence “PraderLosinger opère depuis 1925.” Source: RevenueBase Database · checked Sep 19, 2026
12	ZS Ingénieurs Civils	Indirect evidence	Petit Lancy, SwitzerlandHQ checked Sep 19, 2026	11-50	24 contacts →
	Indirect evidence “Depuis 1969, le bureau zs ingénieurs civils est spécialisé dans la conception et réalisation de projets d’ingénierie civile.” Source: RevenueBase Database · checked Sep 19, 2026
13	Filippini & Partner Ingegneria SA	Indirect evidence	Biasca, SwitzerlandHQ checked Sep 19, 2026	11-50	19 contacts →
	Indirect evidence “Filippini & Partner Ingegneria SA è una società indipendente di ingegneria, fondata nel 1972 a Biasca (Ct.” Source: RevenueBase Database · checked Sep 19, 2026
14	HBI Haerter	Indirect evidence	Zurich, SwitzerlandHQ checked Sep 19, 2026	11-50	19 contacts →
	Indirect evidence “HBI Haerter - Consulting Engineers Your partner for ventilation, aerodynamics and safety of tunnels HBI Haerter AG (CH) and HBI Haerter GmbH (DE) are firms of consulting engineers.” Source: RevenueBase Database · checked Sep 19, 2026
15	Kern Tunneltechnik	Indirect evidence	Lugano - Paradiso, SwitzerlandHQ checked Sep 19, 2026	11-50	18 contacts →
	Indirect evidence “KERN Tunneltechnik SA is an international company providing high-tech solutions for Tunnelling.” Source: RevenueBase Database · checked Sep 19, 2026
16	Mauderli AG	Partial evidence	Schachen, SwitzerlandHQ checked Sep 19, 2026	51-200	15 contacts →
	Partial evidence “For over 50 years, MAUDERLI AG has delivered custom-engineered infrastructure systems for tunneling, road construction and civil engineering - from planning to the job site.” Source: RevenueBase Database · checked Sep 19, 2026
17	Waprotec AG	Indirect evidence	Widnau, SwitzerlandHQ checked Sep 19, 2026	51-200	12 contacts →
	Indirect evidence “As a construction company, waprotec ag is your reliable partner in all areas of execution and implementation of plans drawn up by planners specialising in the sealing of buildings…” Source: RevenueBase Database · checked Sep 19, 2026
18	Grund- UND Tiefbau AG Basel	Indirect evidence	Basel, SwitzerlandHQ checked Sep 19, 2026	11-50	9 contacts →
	Indirect evidence “Als Spezialisten mit vielfältiger Erfahrung in noch so heiklen und komplexen Herausforderungen beraten wir Sie kompetent und individuell.” Source: RevenueBase Database · checked Sep 19, 2026
19	Jackcontrol Ag, Switzerland	Indirect evidence	Glarus, SwitzerlandHQ checked Sep 19, 2026	11-50	9 contacts →
	Indirect evidence “Jackcontrol, a Swiss Engineering Company founded in 2004, is your innovative and reliable Partner for demanding Pipe Jacking and Microtunneling projects.” Source: RevenueBase Database · checked Sep 19, 2026
20	Alpha Tief- UND Betonbau AG	Indirect evidence	Weinfelden, SwitzerlandHQ checked Sep 19, 2026	11-50	9 contacts →
	Indirect evidence “Im Tief- und Betonbau gehts handfest zu und her.” Source: RevenueBase Database · checked Sep 19, 2026
21	Contratto AG	Indirect evidence	Goldau, SwitzerlandHQ checked Sep 19, 2026	11-50	7 contacts →
	Indirect evidence “Wir sind ein etabliertes, regionales Tiefbauunternehmen mit langjähriger Familientradition.” Source: RevenueBase Database · checked Sep 19, 2026
22	Mühlhäuser Group	Indirect evidence	Freienbach Sz, SwitzerlandHQ checked Sep 19, 2026	51-200	6 contacts →
	Indirect evidence “Global Leader in Tunnelling and Mining Equipment Welcome to the world of MÜHLHÄUSER, one of the worlds most recognized brands for machinery solutions under ground.” Source: RevenueBase Database · checked Sep 19, 2026
23	Buntech Gmbh Infrastruktur FÜR Tunnelanlagen	Partial evidence	Langenthal, SwitzerlandHQ checked Sep 19, 2026	1-10	5 contacts →
	Partial evidence “Strassentunnel #Bahntunnel #BSA #Gewerke #Tunnelinfrastruktur #ICT #BSA-Stellen #hiring KLEINES INGENIEURBÜRO – GROSSES BSA-FACHWISSEN Mit Leidenschaft nehmen wir bei buntech jede…” Source: RevenueBase Database · checked Sep 19, 2026
24	Steinerjobs	Indirect evidence	Chur, SwitzerlandHQ checked Sep 19, 2026	1-10	5 contacts →
	Indirect evidence “Die Steinerjobs ist ein Personaldienstleister mit über 30 Jahren Erfahrung.” Source: RevenueBase Database · checked Sep 19, 2026
25	Imperiali AG	Indirect evidence	Büren An Der Aare, SwitzerlandHQ checked Sep 19, 2026	51-200	5 contacts →
	Indirect evidence “Seit Giovanni Imperiali 1875 das Unternehmen gründete, liegt uns das Bauen im Blut.” Source: RevenueBase Database · checked Sep 19, 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: tunneling contractors. 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 tunneling contractors.
Partial evidence: Its own public description names part of tunneling contractors, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name tunneling contractors. 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 78 tunneling contractors based in Switzerland

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Tunneling contractors based in Switzerland at a glance

As of Sep 19, 2026

43.0%Verified-email coverage

53.3Average contacts per company

11-50Median size (employees)

3.8%Largest-city concentration · Zurich

Sep 19, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

5,001-10,000

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 78 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 tunneling contractors, 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 “tunneling contractors”. 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 tunneling contractors), 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 tunneling contractors, 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, 1,786 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 19, 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 tunneling contractors, 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 tunneling contractors are there based in Switzerland?

RevenueBase identified 78 tunneling contractors 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?

Implenia, headquartered in Opfikon, tops this list with the largest team on record.

Which city has the most tunneling contractors?

Zurich leads with 3 headquartered companies, followed by Bern (2) and Biel (2).

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 1,786 verified decision-maker contacts tracked across these 78 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 19, 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.