Yaremko served in the provincial cabinet as Minister Without Portfolio in 1958, Minister of Transport from 1958 to 1960, Provincial Secretary and Registrar from 1960 to 1966, Minister of Public Welfare from 1966 to 1967, Minister of Social and Family Services from 1967 to 1971, Provincial Secretary and Minister of Citizenship from 1971 to 1972 and Solicitor General from 1972 to 1974.
Very active in the Ukrainian Canadian community he was a benefactor of many of its causes and in 2009 was the recipient of the first Senator Paul Yuzyk Award for his commitment to multiculturalism.[1]