Government and different oil companies in Kenya. Seconded by the United Nations to the International Peace Support Training Centre, Dr. Mumma worked as the Head of Applied Research in the Department of Peace and Security Research, as a Curriculum Development Officer and a Conflict Prevention Analyst.
Here she trained peacekeepers and personnel from different peace organizations and regional bodies in Africa and specifically the Eastern African region. Thereafter, she worked with the Truth Justice and Reconciliation Commission Kenya (TJRC) as the Resident Consultant for reconciliation. She is the author of several articles, occasional papers, book chapters and editor of different Newsletters. She regularly inducts Kenyan diplomats. For the last ten years, she has been closely engaged in academic research and the supervision of Ph.D. and Master’s students in different Universities. She is married with a family.