Sir.Nwosu has over 40 years’ experience as an investor in the Nigerian Capital Market and founded Independent Shareholders’ Association of Nigeria (ISAN) in 1998.

He is at present the  National President of the Boys’ Brigade of Nigeria, Acting Chairman of R.T. Briscoe PLC, Director of MRS PLC, NAHCO PLC, Kajola PLC,  member or chairman of audit committees of a number of  quoted and unquoted companies in Nigeria, and member, Nigerian Capital Market Development Fund.