Head office

Your contacts

Gina Grimm

Reception and helpdesk

Paule Marchand

Reception and helpdesk

Marina Davies

Reception and helpdesk

Services at our headoffice

From our headquarter in Dübendorf, our key accounts support the Swiss-wide services such as: building cleaning, garden and site maintenance, technical maintenance and infrastructural services.


Indoor cleaning and care
Window and façade cleaning
Major cleaning
Construction site and building cleaning

Area & Plants

Landscaping maintenance
Paved surface maintenance
Winter services
Indoor plants

Technics & Building

Technical building management
On-call technical services
Building maintenance / Building services
Health, Security, Safety & Environment (HSSE)

Infrastructure & Services

Reception and Helpdesk
Office support
Housekeeping and Catering
gammaRenax Ltd. | Supply and Disposal Services

gammaRenax AG
8600 Dübendorf
Ringstrasse 15
Tel. +41 44 277 77 77


Opening hours:
08.00 – 12.00 Uhr
13.00 – 17.00 Uhr

Piquet number​:
Tel. 0848 277 777