ranQ
ranQ
ranQ
DirectoryIndustriesKnowledgeComparisonsSoon
Sign inCheck visibility
ranQHSG Startup LabelRecognised by the
HSG Startup Label

The first Swiss company directory, built to boost AI visibility.

Product
  • Pricing
  • Directory
  • Industries
Company
  • About
  • Contact
  • Legal
© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint742,806 companies indexed · Last updated: today
DirectoryConstruction & ArchitectureCivil Engineering FirmsOltenHOLINGER AG
HOLINGER AG Logo
Verified· 4 sources

HOLINGER AG

Summary

About the company

HOLINGER AG is an engineering firm that develops solutions for the water cycle and operates in wastewater, water supply, hydraulic engineering, urban drainage and environmental sustainability. The company provides holistic planning, consulting and project delivery across the project lifecycle, with multidisciplinary services in civil engineering, energy, industry and digital design.

AI-generated
Offering

Products & services

Industry:Civil Engineering Firms
✓ Offered8
Water supply
Plant and utility line construction across all service phases, drinking water treatment, consulting and operational support, strategic water supply planning, quality assurance, protection zones and hydraulic calculations.
Wastewater
Expansion and new construction of wastewater treatment plants, operational optimization, elimination of micro-pollutants, sludge recovery, industrial wastewater pre-treatment plants, long-term planning and consolidation studies.
Hydraulic engineering
Development of baseline data, hazard mapping, risk analyses, hydrological reports, flood protection, revitalization, designation of the river corridor, waterway maintenance planning, emergency planning and reconstruction measures.
Urban drainage
Rainwater management, sponge city / blue-green infrastructure, drainage concepts, GEP/VGEP, sewer systems and special structures, hydraulics, network management, measurement campaigns and water ecology.
Energy
Area supply, energy storage, heating plants and cooling facilities, power plants as well as special plants for biomass digestion and gas conditioning, including concepts for heat, cold and power supply.
LeadhubOutbound Leads by COHAGA

Looking for direct email addresses and phone numbers?

Leadhub delivers verified contact details and decision-makers from over 750,000 Swiss companies — management, procurement, marketing, HR.

Discover Leadhub
Reviews

Aggregated rating

Aggregated rating
5
of 5

Aggregated from 2 reviews across all connected sources

Sources
GGoogle52
★TrustpilotSoon
PProvenExpertSoon

Further sources are added continuously and factored into the ranQ Rating.

Press

Media

June 30, 2026Media
«Het äs Gschmäckli»: Gemeindepräsidentin gibt Ehemann Bauaufträge
20min.ch

Knowledge

No knowledge articles yet

Once HOLINGER AG has claimed this profile, we'll publish editorial articles and case studies here together.

Get started
Comparisons

HOLINGER AG in comparison

Soon

Industry comparisons are coming soon

We're preparing industry comparisons that rank HOLINGER AG by reviews, experience and specialisations.

Is this your company?

Claim the company profile of HOLINGER AG to make its contact details visible. With a plan we additionally create and publish industry comparisons, articles and much more.

Secure profile

Location

Bahnhofquai 2
4600 Olten
Opening hours
Mon
08:00 - 18:00
Tue
08:00 - 18:00
Wed
08:00 - 18:00
Thu
08:00 - 18:00
Fri
08:00 - 18:00
Sat
Closed
Sun
Closed

At a glance

Legal form
Branch
UID
CHE-207.312.424
Founded
1983 · 43 years
Last commercial register change
October 6, 2008
Employees
11 to 20

Similar companies

FL
Fürst Laffranchi Bauingenieure GmbH
Wolfwil
WA
Wanner AG Solothurn
Solothurn
SA
SMT AG Ingenieure + Planer
Solothurn
SI
Sperisen Ingenieure GmbH
Breitenbach