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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,887 companies indexed · Last updated: today
DirectoryBusiness & Technical ServicesTechnical Consulting & EngineeringSionSigma Ingénierie et Maintenance SA
Sigma Ingénierie et Maintenance SA Logo
Verified· 2 sourcesTrust Score
Summary

About the company

The core activity of Sigma Ingénierie & Maintenance SA consists of two main areas: 1. **Engineering**: The company provides engineering services, particularly in the fields of: * Design and planning of technical installations in buildings (heating, air conditioning, ventilation, plumbing, water treatment) * Development of energy concepts (heat, electricity, cold) including solar and geothermal systems 2. **Maintenance**: The company provides maintenance and repair services, particularly in the fields of: * Remote monitoring and control of technical installations * Preventive and corrective maintenance of technical installations in buildings and large power plants The company thus offers a combination of engineering services and maintenance and repair services to plan, install and maintain technical installations in buildings and industrial facilities.

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Offering

Products & services

Industry:Technical Consulting & Engineering
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Sigma Ingénierie et Maintenance SA

✓ Offered6
Engineering of building services installations
Mechanical engineering services for the design of heating, cooling, ventilation, air-conditioning, sanitary and water-treatment installations, as well as associated energy concepts.
Energy concepts and optimisation of energy efficiency
Tailored advice for heat, electricity and cooling needs, using renewable energies, meeting the Minergie standard and selecting high-performance materials and glazing.
Maintenance of building services installations
Corrective and preventive maintenance, management and monitoring of building contracts, automation during the operating phase, energy optimisation and an intervention service 7 days a week.
Telemanagement and remote supervision
Constant monitoring of installations, real-time tracking, detection and repair of faults remotely, annual consumption reports and improvement suggestions.
Technical facility management
Comprehensive management of technical building installations and operating contracts, with a single point of contact for the sanitary systems, heating, ventilation and heat pumps.
Special electromechanical studies and equipment
Design and support for tunnel ventilation, fire protection and equipment for pumping stations, in the electromechanical sector.
Trust & reputation

ranQ Trust Score of Sigma Ingénierie et Maintenance SA: 4.1 out of 5.0

Trust Score4.1/ 5.0

High

x

Data basis 54% · As of October 2026

Without public customer reviews the score stays capped.

Sigma Ingénierie et Maintenance SA has no value in the Reputation area of the ranQ Trust Score because no data is available. The area carries 42% of the weighting and drops out of the calculation for this profile; it does not lower the score, only the reported data basis.
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CriterionValueWeight
  • Review quality: No data point — the criterion is taken out of the weighting and does not lower the score.—24%
  • Review volume: No data point — the criterion is taken out of the weighting and does not lower the score.—10%
  • Review recency: No data point — the criterion is taken out of the weighting and does not lower the score.—8%
Sigma Ingénierie et Maintenance SA scores 85.5 out of 100 points in the Substance area of the ranQ Trust Score. This area carries 28% of the weighting.
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CriterionValueWeight
  • Establishment: Years since founding or brand launch, logarithmic. The maximum is reached at 15 years.100.012%
  • Company size: The headcount band, researched by ranQ or stated by the company. It is scored in steps rather than by head count, because the data only provides bands.55.07%
Sigma Ingénierie et Maintenance SA scores 83.3 out of 100 points in the Identity area of the ranQ Trust Score. This area carries 22% of the weighting.
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CriterionValueWeight
  • Verification: Official register entry (commercial register with UID or professional-body record, 55 points), confirmed domain (20 points) and confirmed ranQ profile (up to 25 points, depending on completeness).83.322%
Sigma Ingénierie et Maintenance SA scores 22.9 out of 100 points in the Visibility area of the ranQ Trust Score. This area carries 8% of the weighting.
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CriterionValueWeight
  • Website authority: Ahrefs' Domain Rating measures, on a scale of 0 to 100, how strongly a website is linked from other websites. For Swiss SMEs the range up to 40 is typical; the maximum is reached at 35.22.94%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Sigma Ingénierie et Maintenance SA reaches a ranQ Trust Score of 4.1 out of 5.0 — rated «High». No public customer reviews are available for this provider; the rating is based on the remaining criteria. The data basis is 54%, so the score is backed by part of the criteria. As of October 2026.

The Trust Score cannot be bought and is calculated from publicly verifiable data.

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Location

Avenue de la Gare 19
1950 Sion

At a glance

Legal form
Corporation
UID
CHE-106.043.936
Founded
1989 · 37 years
Last commercial register change
January 23, 2025
Employees
1 to 10
Legal form: Graded by liability and disclosure. The weight is kept small: a sole proprietorship is not a dubious company, it is just liable differently.100.06%
  • Branch offices: Branch offices linked in the commercial register. Having none is normal and costs no points.70.03%
    • Full methodology

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