1968: Teknisk Service AS is founded on July 10, 1968. Opening on September 2, 1968.
1972: TESS entered the oil industry.
1976: Welding and tools were added to the product range.
1984: By 1984, TESS offered over 20,000 articles. The introduction of quality assurance and a broader customer focus shaped the future.
1992: TESS became the largest supplier of hoses in Norway. A major agreement with Statoil laid the foundation.
1995: Workwear and safety gear became an important part of the product range. TESS opened its first partner shop at ABB in Drammen.
2007: THM hose control was established.
2005: TESS expands operations into Sweden and Scotland.
2009: Launches subsea production operations.
2011: Acquires fifty percent of Bic in Brazil, named BICTESS. Receives a major order for THM from Maersk Drilling and acquires fifty percent of the shares in T&M Hydraulics in Houston.
2018: TESS is established in Gran Canaria. Celebrates its 50th anniversary with the Industry Trade Fair and a jubilee party at the Telenor Arena. Erik Jølberg transfers ownership to the Erik Jølberg Foundation.
2019: Opens the first TESSgate at Equinor, a new 24/7 RFID supply solution.
2022: TESS becomes a member of Ethical Trade Norway. The first TESSgate offshore. Successful testing of unmanned bunkering.