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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,194 companies indexed · Last updated: today
DirectoryBusiness & Technical ServicesTechnical Consulting & EngineeringSt. GallenHEFTI. HESS. MARTIGNONI. St. Gallen AG
HEFTI. HESS. MARTIGNONI. St. Gallen AG Logo
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HEFTI. HESS. MARTIGNONI. St. Gallen AG

Summary

About the company

HEFTI. HESS. MARTIGNONI. St. Gallen AG is a building-services engineering firm providing electrical and multidisciplinary building-technology planning (HLKSE+), offering services such as energy supply, HVAC/PL engineering, building automation, lighting design, photovoltaics and fire protection for building and infrastructure projects.

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Products & services

Industry:Technical Consulting & Engineering
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Integrated Building Services (HLKSE+)
Integrated building services planning for building and infrastructure projects, including HLKSE+, energy supply, lighting concepts, building automation and fire protection planning.
HVAC Engineering
HVAC engineering for building and infrastructure projects, with project-specific solutions for heating, ventilation, air conditioning and sanitary services.
Electrical Engineering
Electrical engineering for building and infrastructure projects, as part of building services planning and in coordination with other technical disciplines.
Building Automation
Design of building automation as part of integrated building services solutions for new-build and infrastructure projects.
Overall Coordination/BIM
Overall coordination and BIM methods for planning, coordination and implementation of technical building and infrastructure projects.
Energy Supply
Planning of energy supply solutions for buildings and infrastructure, aligned with project requirements and technical boundary conditions.
Photovoltaics
Planning of photovoltaic systems as part of energy-oriented building services and infrastructure projects.
E-Mobility
Planning of e-mobility solutions, in particular in connection with electrical infrastructure and building services.
Lighting Concepts
Planning of lighting concepts for buildings and facilities, including topics related to light and light pollution.
Security/Door Engineering
Planning of security and door engineering solutions as part of technical building equipment.
Fire Protection Planning
Fire protection planning for building and infrastructure projects as part of integrated building services.
Infrastructure Engineering
Technical engineering for infrastructure projects, including rail, airports, data centres and power plants.

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Location

Ikarusstrasse 9
9015 St. Gallen
Opening hours
Mon
08:00 - 17:00
Tue
08:00 - 17:00
Wed
08:00 - 17:00
Thu
08:00 - 17:00
Fri
08:00 - 17:00
Sat
Closed
Sun
Closed

At a glance

Legal form
Corporation
UID
CHE-295.431.730
Founded
2011 · 15 years
Last commercial register change
August 13, 2026
Employees
101 to 500

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