Ajumogobia became a Senior Advocate of Nigeria in 2003, and was appointed Attorney General and Commissioner of Justice for Rivers State in 2003.

Miguel Angel Moratinos Cuyaube- Minister of Foreign Affairs and Cooperation of Spain of Political Dialogue between EU and ECOWAS Luxembourg (2010); Co-Chairman (with H.E.

George Rebela Chicoti Minister of Foreign Affairs of Angola), International Contact Group on Guinea Bissau at UNGA (September 2010).

As Nigeria's Minister of State for Petroleum he pushed for deregulation of the downstream sector of the oil industry.

He said that deregulation would eliminate shortages of petroleum products while saving taxpayers over N687 billion in annual subsidies.