Later, while working at the Daily Times or on sabbatical, he attended the University of Nigeria, Nsukka (September 1964 – October 1966) where he earned a degree in Mass communication, and then the University of Lagos where he studied Law. He attended the Nigerian Law School, Lagos (October 1974 – May 1975), and was called to the bar in June 1975.

Momoh was appointed Minister of Information and Culture by General Ibrahim Babangida, holding this position from September 1986 until 1990.

Momoh was Chairman of the board of directors of Nigerian Airways from 1991 to 1993. He was appointed a Member of the Edo State Economic Advisory Committee in 1991, and a member of the Nigerian Press Council in December 1992.

As of 1996 Momoh was one of the directors of the Newswatch magazine, said to have a circulation of 150,000 copies in Africa, Europe and North America. Momoh was Director of the Alex Ekwueme Presidential Campaign Organization in 1999.He chaired the screening and conduct of Gubnetorial and State House of Assembly primaries in Kano Chapter of the P.D.P. for the 1999 General Elections together with Abdullahi Aliyu Sumaila and Senator Bala Tafidan Yauri.

He was chairman, Media and Publicity of the All Nigeria People's Party (ANPP) Campaign Organisation in the 2003 and 2007 elections. He was also Chairman of the Political Committee of the Muhammadu Buhari Organisation.

In January 2011 Momoh was appointed Chairman of the Congress for Progressive Change (CPC) in the lead-up to the April 2011 national elections, with Buba Galadima appointed the National Secretary.