Joseph was born in 1968 and went to school in his hometown in Kenya before proceeding to Bhopal University, India, in 1987. He graduated in Arts and Law and returned to Kenya in 1993. As well as being a Certified Public Secretary, he is currently practising law in Nairobi, having his own law firm and several associates working with him. He is very much involved in the Clean Kenya Campaign, "a massive effort aimed at curing the rot" in his country.
