Company lists · Data refreshed September 2026

Top 25 Infrastructure development firms based in Switzerland

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

Compiled by the RevenueBase Data Team Data refreshed Sep 20, 2026 166 companies tracked

RevenueBase identified 166 infrastructure development firms headquartered in Switzerland as of September 2026 and tracks 5,130 professional contacts across them, including 2,177 with verified work emails. Zurich is the largest hub.

This list covers infrastructure development 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 20, 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 20, 2026 86% judged on-target in blind review

166Companies

5,130Contacts tracked

2,177Verified emails

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The 25 largest infrastructure development firms based in Switzerland

Ranked by team size

Top 25 of 166 infrastructure development firms based in Switzerland, ranked by team size, largest first. Data refreshed Sep 20, 2026. RevenueBase Smart Search rates how each company's information relates to infrastructure development 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	Implenia	Partial evidence	Opfikon, SwitzerlandHQ checked Sep 20, 2026	5,001-10,000	3,050 contacts →
	Partial 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 20, 2026
2	Lombardi Engineering Switzerland	Partial evidence	Bellinzona-giubiasco, SwitzerlandHQ checked Sep 20, 2026	201-500	276 contacts →
	Partial evidence “Lombardi Switzerland is a leading engineering company with over 400 skilled engineers and technicians delivering multidisciplinary and specialized services in infrastructure and…” Source: RevenueBase Database · checked Sep 20, 2026
3	IUB Engineering LTD	Partial evidence	Bern 14, SwitzerlandHQ checked Sep 20, 2026	201-500	156 contacts →
	Partial evidence “IUB Engineering AG has been an overall planner for infrastructure systems for over 50 years.” Source: RevenueBase Database · checked Sep 20, 2026
4	Locher Ingenieure	Indirect evidence	Stadtkreis 1 Altstadt, SwitzerlandHQ checked Sep 20, 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 20, 2026
5	Enerconom AG	Indirect evidence	Bern, SwitzerlandHQ checked Sep 20, 2026	51-200	60 contacts →
	Indirect evidence “Enerconom AG is a Construction company located in Weyermannsstrasse 20, Bern, Canton of Bern, Switzerland.” Source: RevenueBase Database · checked Sep 20, 2026
6	Project Partners LTD Consulting Engineers	Indirect evidence	Lugano, SwitzerlandHQ checked Sep 20, 2026	51-200	54 contacts →
	Indirect evidence “Project Partners Ltd Consulting Engineers is an engineering firm, with headquarter in Lugano-Switzerland, specialized in the construction and strategic consultancy of large works…” Source: RevenueBase Database · checked Sep 20, 2026
7	Ingphi Concepteurs D'ouvrages D'art	Partial evidence	Lausanne, SwitzerlandHQ checked Sep 20, 2026	51-200	52 contacts →
	Partial evidence “INGPHI - Concepteurs d'ouvrages Bureau d'ingénieurs & architectes Pont · Bâtiments · Infrastructures INGPHI est un bureau d’ingénieurs civils spécialisé dans la conception et la…” Source: RevenueBase Database · checked Sep 20, 2026
8	Vanoli AG	Indirect evidence	Zofingen, SwitzerlandHQ checked Sep 20, 2026	201-500	44 contacts →
	Indirect evidence “Vanoli AG – Baukunst zum Verlieben Perfektion von der Bauplanung bis zur Bauabnahme, innovative Ideen und Liebe zum Detail in den Bereichen Bahninfrastruktur – Gleistiefbau -…” Source: RevenueBase Database · checked Sep 20, 2026
9	ILF Consulting Engineers In Switzerland	Indirect evidence	Zurich, SwitzerlandHQ checked Sep 20, 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 20, 2026
10	Lötscher Plus Gruppe	Indirect evidence	Luzern, SwitzerlandHQ checked Sep 20, 2026	201-500	34 contacts →
	Indirect evidence “Der Weg in die Zukunft erfordert starke Verbindungen.” Source: RevenueBase Database · checked Sep 20, 2026
11	Henauer Gugler AG	Indirect evidence	Zürich, SwitzerlandHQ checked Sep 20, 2026	51-200	31 contacts →
	Indirect evidence “1922 von Ernst Rathgeb gegründet, hat unser Unternehmen bereits in frühen Jahren an wichtigen Bauwerken wie z.B.” Source: RevenueBase Database · checked Sep 20, 2026
12	Flückiger Bosshard AG	Indirect evidence	Zürich, SwitzerlandHQ checked Sep 20, 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 20, 2026
13	Mauler SA	Indirect evidence	Neuchâtel, SwitzerlandHQ checked Sep 20, 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 20, 2026
14	ZS Ingénieurs Civils	Indirect evidence	Petit Lancy, SwitzerlandHQ checked Sep 20, 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 20, 2026
15	Synaxis Ag, Zurich	Indirect evidence	8050 Zürich, SwitzerlandHQ checked Sep 20, 2026	51-200	24 contacts →
	Indirect evidence “Die Synaxis AG plant und realisiert anspruchsvolle Projekte im Hochbau, Brückenbau und Infrastrukturbau, in der Bauwerkserhaltung sowie in Grundbau und Geotechnik.” Source: RevenueBase Database · checked Sep 20, 2026
16	Tozzo AG	Indirect evidence	Bubendorf, SwitzerlandHQ checked Sep 20, 2026	201-500	24 contacts →
	Indirect evidence “Die Tozzo AG ist ein führender Baudienstleister im Tief- und Strassenbau mit rund 270 Mitarbeitenden und vier Standorten in den Kantonen Basel-Landschaft, Basel-Stadt, Aargau und…” Source: RevenueBase Database · checked Sep 20, 2026
17	Theiler Ingenieure AG	Indirect evidence	Thun, SwitzerlandHQ checked Sep 20, 2026	51-200	23 contacts →
	Indirect evidence “Ihr kompetenter Partner für Planung und Bauleitung im Hochbau, Tiefbau, Wasserbau und Brückenbau.” Source: RevenueBase Database · checked Sep 20, 2026
18	Filippini & Partner Ingegneria SA	Indirect evidence	Biasca, SwitzerlandHQ checked Sep 20, 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 20, 2026
19	Buchmann Partner AG	Indirect evidence	Uster, SwitzerlandHQ checked Sep 20, 2026	11-50	19 contacts →
	Indirect evidence “Wer sind wir?” Source: RevenueBase Database · checked Sep 20, 2026
20	HKP Bauingenieure AG	Indirect evidence	Zurich, SwitzerlandHQ checked Sep 20, 2026	11-50	17 contacts →
	Indirect evidence “Die HKP Bauingenieure AG ist eine Tochter der Emch+Berger AG Bern und ein Unternehmen der 1953 gegründeten Emch+Berger Gruppe.” Source: RevenueBase Database · checked Sep 20, 2026
21	Blesshess	Indirect evidence	Luzern, SwitzerlandHQ checked Sep 20, 2026	11-50	17 contacts →
	Indirect evidence “Anspruchsvolle Bauwerke sind unser Antrieb.” Source: RevenueBase Database · checked Sep 20, 2026
22	Planquadrat AG	Indirect evidence	Willisau, SwitzerlandHQ checked Sep 20, 2026	11-50	15 contacts →
	Indirect evidence “Wir, die PlanQuadrat AG, sind ein regional verankertes Bauingenieurbüro im Kanton Luzern.” Source: RevenueBase Database · checked Sep 20, 2026
23	WBI AG	Indirect evidence	Schaffhausen, SwitzerlandHQ checked Sep 20, 2026	11-50	15 contacts →
	Indirect evidence “WBI-Haupttätigkeitsgebiete: Infrastrukturbau: Strassenbau, Bahnbau, Werkleitungsbau, Entwässerungsplanung, Wasserversorgung, Quartierplanung Konstruktiver Ingenieurbau…” Source: RevenueBase Database · checked Sep 20, 2026
24	Nicolas Fehlmann Ingénieurs Conseils SA	Indirect evidence	Morges, SwitzerlandHQ checked Sep 20, 2026	11-50	14 contacts →
	Indirect evidence “Notre bureau d’ingénieurs civils a débuté ses activités en juin 1996 sous la forme juridique d’une raison individuelle.” Source: RevenueBase Database · checked Sep 20, 2026
25	Vonplon Strassenbau AG	Indirect evidence	Baar, SwitzerlandHQ checked Sep 20, 2026	51-200	14 contacts →
	Indirect evidence “Seit über 45 Jahren zuverlässig im Strassen- und Tiefbau Die Vonplon Strassenbau AG steht seit 1977 für Qualität, Zuverlässigkeit und Kompetenz im Strassen- und Tiefbau.” Source: RevenueBase Database · checked Sep 20, 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: infrastructure development 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 infrastructure development firms.
Partial evidence: Its own public description names part of infrastructure development firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name infrastructure development 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 166 infrastructure development firms based in Switzerland

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Infrastructure development firms based in Switzerland at a glance

As of Sep 20, 2026

42.4%Verified-email coverage

30.9Average contacts per company

11-50Median size (employees)

11.4%Largest-city concentration · Zurich

Sep 20, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

1,001-5,000

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 166 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 infrastructure development 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 “infrastructure development 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 infrastructure development 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 infrastructure development 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, 2,177 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 20, 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 infrastructure development 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 infrastructure development firms are there based in Switzerland?

RevenueBase identified 166 infrastructure development 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?

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

Which city has the most infrastructure development firms?

Zurich leads with 19 headquartered companies, followed by Bern (8) and Lugano (5).

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 2,177 verified decision-maker contacts tracked across these 166 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 20, 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.