Bertram was called to the Nigerian Bar and enrolled in the Supreme Court in March 1995. He has vast experience in litigation and has been involved in several matters relating to Oil mining, environmental pollutions, land law, banking, commercial law and human rights. He is an active member of the Nigerian Bar Association and has attended all the Annual General Conferences of the Association from 1999. He is a former secretary of the Aba Branch of the Association. He heads the Aba office.