[1] He received a Bachelor of Science degree in civil engineering at Drexel University and received a Master of Science degree in structural engineering at Stanford University, and has worked on a variety of development projects.

He has been a longtime supporter and assistant of President Paul Biya, and is an Anglophone and a member of the Bakweri ethnic group.

He left his position as Prime Minister after a cabinet reshuffle which followed Biya's successful 2004 reelection, for which Musonge served as campaign manager.

Musonge is a member of the Central Committee of the ruling Cameroon People's Democratic Movement (CPDM).

[2] Biya appointed Musonge as Grand Chancellor of National Orders on April 4, 2007.