gammaRenax is a powerful
Quality provider of integral facility services

Facility Services throughout Switzerland

Severin Gallo, CEO

Severin Gallo

Owner and CEO
graduate civil engineer
"Versatility, flexibility and customer focus are key characteristics of our understanding of service."
Our customers are the focus of our commitment.

gammaRenax is an efficient quality provider of integral facility services with more than 1,600 employees at 16 locations in all parts of the country. With an annual turnover of over CHF 81 million, the owner-managed company is one of the most important facility services providers in Switzerland and manages a portfolio of over 2,110 properties.

The trend towards bundling facility services and integrated management contracts continues. In close cooperation with our clients, we respond flexibly to changing, individual requirements, optimize the overall offering and pass on the resulting price advantages. In doing so, both our culture of innovation and service and our process orientation come to bear - and benefit our customers.

Our certified management system, which records the processes in an action-oriented manner, proves itself in daily work. The "facilityGate" developed by gammaRenax, an interactive online tool for performance management, was expanded to include CAD functionality. This allows us to reliably map the performance targets agreed with the customer in the virtual world and to meet them at a consistently high level.

With competence and enthusiasm, we are committed to exceeding our customers' expectations 365 days a year. We attach great importance to transparent communication and respectful interaction with all our contacts. We would like to thank our customers and partners for their loyalty and our employees for their commitment, and we look forward to continuing our successful collaboration.



gammaRenax constantly and flexibly adapts its services to the needs of its customers

Dienstleistung Hygiene


Dienstleistung Areal und Pflanzen

Area & Plants

Dienstleistung Gebaeude und Technik

Technology & Buildings

Dienstleistung Infrastruktur und Dienste

Infrastructure & Services

Certified systems


Providing first-class quality services is no longer enough in the facility services industry. Equally important are occupational safety, environmental protection and energy as well as ethics. These aspects form the backbone of gammaRenax AG's certified management system.


Quality management (ISO 9001):

We meet high standards for the benefit of all stakeholders beyond the corporate duty of care. With the active participation of all stakeholders, we focus on the following aspects:
  • Ensure continuity, best practice & leadership
  • Proactivity, Suggestion & Capture Customer Viewpoint
  • Promotion of personal responsibility, self-reflection & Honesty
Target: High customer satisfaction, complaints <4.5 / 10,000 working hours

Environmental and energy management (ISO 14001 / ISO 50001):

An economical and sensible use of resources has a positive effect on the health of our staff, the wallets of our customers and the environment, as well as on energy consumption.
  • Understanding of the framework conditions & interrelationships
  • Develop efficient, technical and methodical solutions
  • Awareness raising & involvement of all stakeholders
Target: KPI improvement of 3% per year (revenue-adjusted)
ASI Arbeitssicherheit

Occupational Safety & Health (ISO 45001):

Occupational safety and keeping our employees healthy are indispensable components of our corporate responsibility.

  • Recognition of hazards and their relevance
  • Definition & implementation of effective working methods
  • Commitment & enforcement by superiors

Goal: Recognized in the top quarter in the industry comparison

gRMs Ethik

Ausbildung (EDUQUA) & Ethik (In Anlehnung an die ISO 26001 / SA 8000)

The satisfaction of our employees is just as important to us as the social responsibility of our company. Our approach to ethical issues is based on ISO 26000 (Business Responsibility).

  • Communication of own values & exchange with all stakeholders
  • Operation of a direct contact point:
  • Explaining & consistently implementing your own

Target: High employee satisfaction, fluctuation <10% / year

Here you can find us


gammaRenax constantly and flexibly adapts its services to the needs of its customers


Hauptsitz Zürich Nord Zürich Süd Espace Mittelland Nordwestschweiz Zentralschweiz Tessin Nordostschweiz Nordostschweiz Engadin KWZ AG Tessin Romandie





Management Summery ZHW Service Camp 2024 Die gammaRenax AG war in diesem Jahr der offizielle Partner des ZHAW Service Campsfür Facility Management Studierende. Lesen

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Peroxide cold fogging

Coronabusters: Room disinfection with peroxide cold fogging Up to now, we have offered our customers surface disinfection using DesiClean-5%. This is still recommended. However, in order to achieve a complete disinfection of all surfaces

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LED City

LEDCity December 2020 gammaRenax switches to the "lighting of the future"... Read project description

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Sustainability management Interview with Severin Gallo

Nachhaltigkeitsmanagement, Artikel Rationell reinigen – Österreich / Februar 2019 Herr Gallo, ist Nachhaltigkeitsmanagement zur Chefsache geworden?Definitiv! Nachhaltigkeit gehört auf die Agenda der Geschäftsleitung… Nachhaltigkeitsmanagement Interview

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Innovative partner: Efficient facility management

 - At the Kongresshaus Zurich, tradition and innovation merge to create a holistic experience. The same applies to the family-run facility management company gammaRenax, which will be responsible for the operational maintenance of the Tonhalle and Kongresshaus Zurich in the future.


Customer reviews


Read what our customers say about our services


Linie rot-schwarz

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