politician member of the Parliament of Norway
He was elected to the Norwegian Parliament from Vest-Agder in 1958, but was not re-elected in 1961. Outside politics he worked as a jurist, having graduated as candidate.jur. in 1941.
Groos was involved in local politics in Kristiansand from 1947 to 1959, serving as deputy mayor in the period 1955–1957. He chaired the local party chapter from 1948 to 1949.