ISG Switzerland: general and total contracting
Built on a foundation of reliability and local expertise, we combine decades of industry experience with a global network to deliver excellence in every square metre.
Our story
Geneva — first footprint in Switzerland
ISG opens its first Swiss office in Geneva as part of the international ISG Group. The mandate is clear from the start: serve national and multinational occupiers who need a contractor capable of operating at international standards in a local market defined by precision, discretion, and high expectations.
Zurich — a platform rebuilt with purpose
The Zurich operation is relaunched with a sharper focus on premium commercial fit-out for international occupiers. Integrated into ISG’s Central & Eastern European structure, Switzerland becomes a core growth market — with the Zurich office as its operational engine.
Two cities, one national platform
Swiss leadership takes on the region
Continuity, under pressure
In September 2024, ISG UK enters administration. The Swiss business makes a clear call: active projects continue without interruption, client commitments are honoured in full, and a structured path to independence is pursued. In a market where a contractor’s reliability matters as much as its technical capability, how a company behaves in a crisis defines its reputation more than any project portfolio.
New ownership. Same commitment.
As of January 2025, ISG (Switzerland) AG becomes part of ARE Beteiligungen AG — a Swiss-based holding group with a long-term investment horizon. The transition brings structural stability and confirms what the Swiss market already knew: this is a business built to last, independent of the fortunes of any parent group. ISG Switzerland continues as it has always operated — with the same team, the same standards, and the same focus on delivering complex projects for clients who accept no compromise on quality.
Our mission
To bring our vision to life, we focus on:
Deep expertise in interior fit-out
We plan and deliver environments that work — for your people, your customers, and day-to-day operations.
Design and technical quality
Our interdisciplinary team brings together interior architecture, engineering and delivery to create solutions that are executed precisely and built to last.
Reliable partnerships
With proven partner companies and clear project leadership, we manage complex requirements with confidence — safeguarding quality, programme and cost.
Responsibility in sustainability and delivery
We choose materials and processes with care, reduce environmental impact, and act responsibly towards clients, partners and the communities in which we work.
Meet our team
Daniel Ngai-Kocher
Managing Director
Geoffrey Bourroux
Operations Director
Sinisa Vugrin
Head of Business Development
Christiane Frech
Head of Finance and Controlling
Monika Wittwer
HR Business Partner & Office Manager
Regan Blackwood
Head of Commercial Zurich
Atef Saidi
Head of Commercial Geneva
Marino Manzoni
Project Director
Gernot Prutsch
Head of Estimating
Krystine Sennhauser
Project Manager
Sören Ritzloff
Project Manager
James Hauck
Senior Design Manager
Renaud Byrne
Project Manager
Boris Sawadogo
Project Manager
Svetlana Miroshnikova
Commercial Manager
Thomas Fröbe
Senior Commercial Manager
Christian Veidt
Commercial Manager
Marc Bressan
Senior Construction & Project Manager
Eduard Nikitenkov
Construction Manager & H&S Manager
Iris Hofmann
Construction Manager
Nadja Dierauer
Construction Manager
Janos Fekete
Construction Manager
Caroline Blondeau
Construction Manager
Timothée Bois
Construction Manager
Lukas Chiesola
Estimator
Jade Al Mulhem
Project Assistant
Harishan Inparajan
Team Assistant
Joanna Collenberg
Office Manager
Delivered workplace projects
Join the ISG team
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