Thomas joined Enterprise Life in 2006 as a customer service officer. In 2009 he was promoted to Unit Head at the Premium Administration Department. In 2011, Thomas was promoted again as Head, Special Market and Church Funeral to lead the sales and distribution of micro insurance policies. He was reassigned as Head, Death Claims in 2014 to lead a team of claim assessors in the payment of genuine claims. Again in 2015, he was reassigned as Head, Customer Service Department to lead the customer service team in providing legendary customer service to all stakeholders.

In 2018, Thomas was seconded to Enterprise Life, The Gambia as the Operations Manager.

He holds a degree in Social Sciences from the Kwame Nkrumah University of Science and Technology (Ghana) and LLB from Ghana Institute of Management and Public Administration (GIMPA). He also holds an Advanced Diploma in Insurance from the Ghana Insurance College (GIC). He is a Diplomate of the Chartered Insurance Institute, UK. Mr. Fianu has rich and diverse training in a variety of Insurance related courses locally and internationally.