Koroma was a Sierra Leonean politician, labor activist, and one of the founding members of the All People's Congress political party.

Alikali Mela made his nephew Bockari Dumbuya a sub-chief, conferring him the title “Or Sultan.” Alikali Mela also crowned SI’s mother a chief, giving her the title of “Ya Alimamy.” That was how Sorie Ibrahim Koroma, the only child to his mother, became a member of two important ruling families in Port Loko – the Bangura and Dumbuya families.

He went to Bo school at a time when it was an institution exclusively for individuals belonging to ruling families in the provinces.

After completing his secondary education, S I Koroma, who had a fierce determination to succeed in life, landed a job with the Sierra Leone Government Co-operative Department.

In 1962, Koroma was elected as a Member of Parliament to the Parliament of Sierra Leone representing a district of Freetown, to which he was re-elected in the 1967 election After the 1967 coup d'état by David Lansana and the return to civilian control in 1968, Koroma became the Minister of Trade and Industry in Siaka Stevens' first cabinet.