Mr. John Kipyegon Tonui is the current acting Postmaster General/ Chief Executive Officer of Postal Corporation of Kenya. Prior to his acting appointment by the PCK Board of Directors on 13^th December 2022, he is the substantive General Manager, Human Resources, Administration and Development, a position he holds since 2014. Mr. Tonui joined Posta Kenya in March 1993 as a Management Trainee and he has risen through ranks in both defunct Kenya Posts and Telecommunication Corporation and Postal Corporation of Kenya over the last 30 years.

He holds a MBA in Strategic and Human Resource Management and a Bachelors of Arts Degree in Humanities and Social Sciences both from The University of Nairobi. He is a dynamic and strategic thinker, a consultant in Human Resource Management and a member of both Institute of Human Resource Management (IHRM) and the Kenya Institute of Management (KIM).

Mr. John Tonui is the current National Treasurer, Kenya Communications Sports Organization (KECOSO); National Trustee Staff Retirement Benefits Scheme Postal Corporation of Kenya; Patron/Chairman Posta Rangers Football Club; Patron Sotik Progressive Forum (SPF) and Leader for Empower to Empower programs among others.