Mr. Masafu has been an Advocate of the High Court of Kenya for over 11 years. He is a Managing Partner and co-founder of Wekesa & Simiyu Advocates. He is a member of the Law Society of Kenya and among the few advocates who sit in the Political Parties Disputes Tribunal which is a quasi-judicial body. His practice is mainly focused on environmental and commercial litigation. He is also a lecturer at Egerton University Law School where his vast knowledge in Family and Succession Law has been pivotal in churning out highly knowledgeable lawyers in these areas of law.

Mr. Masafu is a Masters of Law graduate from the University of Glasgow and is currently a doctorate candidate of law at the University of Nairobi. He attained a Bachelor of Law from the University of Nairobi and a Postgraduate Diploma from Kenya School of Law.