Mr. Owusu Ansah is a Professional Accountant, a member of the Institute of Chartered Accountants (Ghana) and an Alumnus of the University of Ghana.
He served as Council member of the Institute of Chartered Accountants (Ghana) for two terms from 2002 to 2006.
Mr. Owusu Ansah worked with the Internal Audit Department of Unilever Ghana Ltd. as an Auditor and Chief Accountant with International Tobacco Ghana Ltd.
He also worked with the Ghana Cocoa Board (COCOBOD) as Chief Accountant of PBC Ltd. and later as Financial Controller.
At COCOBOD, Mr. Owusu Ansah rose to the rank of Executive Director of the Seed Production Division until he retired in 2006.
Mr. Owusu Ansah was enstooled as Akwamuhene of KOBRESO in the Offinso Traditional Area under the stool name of Nana Owusu-Ansah Barima.
Nana has served as Board Member of the Audit Service from 2003 to 2009 and currently as a member of the Audit Service Board since October 2017 to date.
Nana Owusu-Ansah is also a cashew farmer.