StS-isonor ansatt som arbeider i høyden

Integrated approach






Years of experience

StS-ISONOR is a leading turnkey contractor in maintenance and modification services.

StS-isonor ansatt som arbeider i høyden

Health-promoting workplaces

Our goal is to create health-promoting workplaces, by treating everyone with respect, and building a good culture through openness and honest communication. We will develop products and services that are delivered on time and meet the customer's expectations.

Ansatte i høyden

Innovative solutions

By focusing on continuous improvement, we will offer innovative and cost-effective solutions that meet the needs and requirements of the future, and provide a clear benefit for employees, customers and society.

We will achieve our goals by:

  • Operate in compliance with applicable laws and regulations and meet applicable requirements
  • Cultivate professional knowledge, leadership, commitment, and unity
  • Ensure that everyone feels they have a safe workplace and has a duty to speak up and be active to achieve this
  • Confer and cooperate with all employees, eliminating hazards and occupational health and safety risks
  • Work continuously to reduce environmental impacts, energy and resource consumption
  • Continuously improve our management systems for working environment, external environment and quality
  • Further develop our processes, products, and services 
  • Have a proactive approach and seize opportunities 

Our values

Maritim industri
  • Maritim industri
  • Maritim industri
  • Maritim industri
  • Maritim industri

Tidslinje - StS gruppen

  • 1970s

    Established In 1972 under the name AS Stillas Service. Annual turnover of NOK 150,000. Projects such as the construction of Mongstad, the Condeep platforms, the construction of the Brent deck in Verdal in 1974 and the Statfjord project at Stord in 1976.

  • 1980s

    Expanded its activities within the oil industry with the first long-term agreement for scaffolding services on Statfjord A. We exceeded 500 employees.

    The transition from heavy steel to light aluminium scaffolding in 1983-, characterized as a pioneering initiative in the industry.

  • 1990s

    Industrial Rope access technology is introduced, and we developed the world's first complete welding habitat system. Work on Njord starts at Stord. Work on all Hydro platforms. Troll B, Kollsnes, Hanøytangen, Tjeldbergodden and CCB at Ågotnes.

  • 2000-2010

    2002- First automatic shutdown system for hot work welding habitat. First ISS maintenance contracts in 2003, establishment in the UK in 2007, restructuring and incorporation of NDT services.

  • 2011-2020

    Development of own insulation products, 40th anniversary, ISS maintenance contract at Mongstad, Scaffolding contract Johan Sverdrup project. Life extension project on Njord in 2012.

    Njord returned to Stord after 20 years on the field in 2016!. The pioneering project Haven and ISS contract with Neptune Energy in 2018 and purchase of Bilfingers Lambda products in 2020.

  • 2021-2023

    Expanded the range of services with 3D modeling. ISS contract with Vår Energi in JV with ISONOR Industries! Work on the Jotun A lifetime extension project. Contract in United Arab Emirates. 50th anniversary in 2022! Acquisition of ISONOR Industries and merger to StS-ISONOR AS as of 1 November 2023.

Timeline - ISONOR Industrier

  • 1970s

    Established in 1977 by Bent Mortensen in Skælskør, DK.

  • 1980s

    SN Holding acquires 75% of share capital. IKAS, Frederica is aquired.

  • 1990s

    Established in Sweden with acquisition of Pifab Skandinavien AB.

    IKAS Teknisk Isolering, Herlev acquired.

    Established in Norway with acquisition of Agder Isolering AS.

    IsoleringsConsortiet merged with Norisol.

    Norisol sold to C.W.Obel.

    Expansion in Norway with acquisition of Scan Isolering AS.

  • 2000-2010

    Norisol sold from C.W.Obel to financial investors/consortium.

    Expansion in Sweden with acquisition og K.W. Isolering.

    Norisol Norge acquires NSL ISO Gruppen.

  • 2011-2020

    Norisol Norge acquires Isoteam.

    Norisol Norge sold to new owners/ISO Management.

    ISONOR industrier becomes the new company name.

  • 2021-2023

    ISONOR Industrier sold to StS Gruppen in 2023.