Ibrahim Coomassie was born in Katsina State on 18 March 1942. He was educated at the Provincial Secondary School, Zaria, Barewa College, Zaria, the Detective Training College, Wakefield, UK and Washington DC in the United States.
Ibrahim Coomassie was among the eldest sons of Malam Ahmadu Coomassie, an educationist, and businessman who became a permanent secretary of the ministry of education in the Northern region.
In 1993, Ibrahim Coomassie was appointed Inspector General of the Nigerian police, succeeding Aliyu Atta.
Ibrahim Coomassie retired from service and left with the Government of General Abdulsalami Abubakar in May 1999.
In August 2004, the Emir of Katsina appointed him to a committee to the development and growth of Jamaatul Nasir Islam’s activities in the state.
He became a member of the board of trustees of the Arewa Consultative Forum for Katsina State.
The forum’s mission is to protect the interest of Northern Nigeria and promote healthy co-existence that will sustain the environmental quality, livability, and economic vibrancy of the region.
In September 2008 he suffered serious injuries in a car accident and spent some time in intensive care.
He died on Thursday 19 July 2018 after a protracted illness. He was 76 years old.