He had his early education at Nyakrom Methodist School and continued at St. Nicholas Grammar School (now Adisadel College), Cape Coast.
[6] After his secondary school education, Hagan was employed as a storekeeper by the Union Trading Company (U.T.C.)
[6] Hagan joined the Cape Coast Town Council and became a foundation member of the Convention People's Party in 1949.
In 1951 he was elected as a member of the Legislative Assembly, where he was the Assistant Government Whip.
That same year (1956), he was appointed ministerial secretary (deputy minister) to the Ministry of Local Government.