Building services engineer in
Sion

Sigma Ingénierie et Maintenance SA

Since 1989 · 1–10 empl.

Sigma Ingénierie et Maintenance SA is an engineering company with building-systems design and maintenance divisions. It designs heating, cooling, ventilation, air-conditioning and sanitary systems, as well as electromechanical equipment, and provides facility management, remote monitoring and energy optimisation.

K Energy Sàrl

Since 2014 · 1–10 empl.

K Energy Sàrl is an engineering consultancy for building services, covering heating, ventilation, plumbing and electrical systems. It prepares technical studies and plans, provides energy advice, and supports projects from planning through construction.

Aclimatech SA

Since 2018 · 1–10 empl.

Aclimatech SA is an independent building-services engineering consultancy. It plans heating, ventilation, air-conditioning and refrigeration systems, sanitary installations and building controls, and provides building-physics and energy-assessment services.

GD Climat SA

Since 1982 · 51–100 empl.·4.0(1)

GD Climat SA plans, installs and maintains building services systems for heating, ventilation, cooling and air conditioning, as well as automation and industrial piping. It also provides technical planning and optimisation of these systems.

Valcalorie SA

Since 1965 · 21–50 empl.·4.1(8)

Valcalorie SA plans and delivers building-services projects for new buildings and renovations. It advises on, designs, installs and maintains heating, cooling, ventilation, air-conditioning and sanitary systems, and provides service and technical solutions for industrial facilities.

Workswell Sàrl

Since 2019 · 1–10 empl.

Workswell Sàrl develops energy measurement and monitoring solutions for buildings. Its services include data acquisition, energy monitoring, energy audits and consulting, protocol audits, open products, and custom software and electronics development.

Groupe E Entretec SA

Since 2018 · 101–500 empl.·5.0(1)

Groupe E Entretec SA provides technical building and facility management services for businesses. Its activities include planning, operating and maintaining building systems such as heating, ventilation and cooling, as well as water treatment, energy monitoring and optimisation.

VHTechnic Sàrl

Since 2011 · 1–10 empl.·5.0(3)

VHTechnic Sàrl is an engineering consultancy for plumbing, heating, ventilation, air conditioning and energy systems. Its services include technical studies, tendering and execution plans, project supervision, energy assessments and studies for Minergie-certified buildings.

DB EnTech Sàrl

Since 2019 · 1–10 empl.·5.0(1)

DB EnTech Sàrl is an engineering consultancy for building services and technical installations. It provides heating, ventilation, plumbing and electrical engineering studies, thermal assessments under SIA 380/1, Minergie documentation and photovoltaic studies, and supports projects from cost estimates and tendering through construction and commissioning.

Gil Sequeira - Aetherys Etudes CVCS

Since 2025 · 1–10 empl.

Gil Sequeira - Aetherys Etudes CVCS is an independent building-services engineering and consultancy practice. It prepares studies and designs heating, ventilation, air-conditioning and plumbing systems, as well as building-physics and energy concepts. Its services also include construction supervision and project support.

Kotorri Group Holding SA

Since 2023 · 1–10 empl.

Kotorri Group Holding SA holds stakes in KotorriTech SA and KotorrInvest SA. KotorriTech SA provides building-services engineering for heating, ventilation, plumbing and electrical systems; KotorrInvest SA operates in construction and property development and buys and sells real estate.

EnergyEco Sàrl

Since 2024 · 1–10 empl.

EnergyEco Sàrl is a building-services engineering consultancy covering heating, ventilation, air conditioning, plumbing and electrical systems. Its services include system design and sizing, tendering, preparation of execution plans and construction supervision.