Joseph joined Funguo Investments Limited (FIL) in March 2014 as the Investment Manager, a position he held until August 2021 when he was appointed the Chief Executive Officer. Prior to joining FIL, he worked with the Central Bank of Kenya in various roles.

Joseph holds an MBA from the University of Nairobi, is a Certified Public Accountant (CPA), as well as Chartered Financial Analyst (CFA).