Private · Person · registered roles
Ole-Jacob Siljan
Active in 4 companiesCEO · Chair · Board memberOslo & Porsgrunn
↳ Brreg · company_people
Role timeline
974100169
Daglig leder
974285150
Daglig leder
Yara Norge AS
Daglig leder
974100169
Styremedlem
974285150
Styremedlem
Powered By Telemark
Styrets leder
Yara Norge AS
Styremedlem
since 2023 · bars start at the registry's change date — full periods are not published
Across their companies4 · rolled up
Combined revenue
kr 21.3bn +
Tenders won
2
Status
not all active
Reach
2 industries
Brreg roles + Regnskap · rolled up across their companies — includes historical roles
Reach by industry
Manufacture of fertilisers and nitrogen compounds
1
Other activities of other membership organisations
1
Recent role changes
2026-06-17Became Styremedlem — Yara Norge AS
2026-01-17Became Styrets leder — Powered By Telemark
2024-08-16Became Styremedlem — 974285150
2024-08-16Became Styremedlem — 974100169
2023-08-03Became Daglig leder — Yara Norge AS
Signals
Multiple boardscurrent board roles at 2+ companies
Serial CEOCEO (current or past) at 3+ companies
computed from Brreg roles