Private · Person · registered roles
Jon Tjønn
Active in 5 companiesCEO · Chair · Board memberPorsgrunn & Hjartdal
↳ Brreg · company_people
Role timeline
Bøen,Jon J Tjønn
Innehaver
Hjartdal Elektro AS
Styremedlem
Subøen AS
Styrets leder
HT-Rørprodukter AS
Daglig leder
HT-Rørprodukter AS
Styremedlem
Gjuvåa Kraftverk AS
Styremedlem
since 2017 · bars start at the registry's change date — full periods are not published
Across their companies5 · rolled up
Combined revenue
kr 22.8M +
Tenders won
0
Status
all active
Reach
5 industries
Brreg roles + Regnskap · rolled up across their companies — includes historical roles
Reach by industry
Production of electricity from hydropower
1
Wholesale of hardware, plumbing and heating equipment and supplies
1
Development of building projects
1
Electrical installation
1
Logging
1
Recent role changes
2025-10-17Became Styremedlem — Gjuvåa Kraftverk AS
2019-07-08Became Styremedlem — HT-Rørprodukter AS
2019-07-08Became Daglig leder — HT-Rørprodukter AS
2018-07-19Became Styrets leder — Subøen AS
2015-07-09Became Styremedlem — Hjartdal Elektro AS
Signals
Multiple boardscurrent board roles at 2+ companies
computed from Brreg roles