After serving students in secondary schools and colleges through Kenya Students Christian Fellowship, Dr. Kiiru joined World Vision and helped to establish Kenya office which became the central office of establishing the work of Workd Vision International in Africa. After Workd Vision Dr Kiiru became the Executive Director of Fellowship of Christian Communicators in Africa and Madagascar (Foccam) which helped to train Churches n Church related Communication and Media Organizations to be effective in communicating Christ in Africa. As a Consultant, Dr Kiiru established Lenmac Consultancy Services to assist churches and related bodies to develop leadership and management of community development and to mobilize resources for their work. He also established Lenmac Leadership Institute in order to train leaders for greater effectiveness. In addition, Dr Kiiru served as the Director of Africa Center for Mission /Finish the Task FTT and helped the church in Kenya and the continent to be mission oriented and reaching the unreached people groups. Dr Kiiru is the Chair Emeritus of Daystar University Company/Trustees and also the Chair of Trustees of Kenya Students Christian Fellowship (KSCF). He is also a Trustee of Kenya Christian Fellowship in America (Kcfa). In his teaching Career, Dr Kiiru has been an Associate faculty of Azusa Pacific University in California , Daystar University, Pan Africa Christian University, Nairobi International School of Theology (International Leadership University (ILU), Africa International University (AIU ) and currently teaching at the St Paul’s University. Dr Kiiru is a distinguished Fellow member of Kenya Institute of Management (KIM). Dr Kiiru has a Doctorate in Missiology from Fuller Theological Seminary in California, USA and a Masters of Commerce /Marketing from University of Strathclyde in Scotland,UK. Finally, he has a Masters in Communication and Christian Ministries from Wheaton College in Illinois, USA. Dr Kiiru is an author of several books and articles which include ‘How to Develop Resources for Christian Ministries, Successful Fundraising and his Autobiography A Remnant of Lari Massacre - A Servant Leader Calked to Serve God and Humanity’. Dr Kiiru is married to Nelly Wanjiru Kiiru n together they have 6 children and 14 grandchildren. Like Joshua of the Bible , He and his family have decided to serve God and humanity for the rest of their lives.