Chief of Growth & Strategy, Ziwani | Nairobi City Director, Resource Global | Elder, Renewal
Church

Mwangi Muthui is the Chief of Growth and Strategy at Ziwani, where he leads the organization’s strategic
growth across Africa through partnerships, regional expansion, and the development of contextual learning
experiences that equip Christian marketplace leaders to faithfully live out their calling. He also serves as
the Nairobi City Director for Resource Global, where, over the past five years, he has mentored and
developed Christian professionals to integrate their faith with their work and exercise redemptive influence
in business and society.
Mwangi is driven by a deep conviction that the marketplace is one of God’s greatest mission fields. He is
passionate about seeing the redemption of Africa through Christians who faithfully live out their calling in
every sphere of society, believing that when entrepreneurs, professionals, and business leaders embrace
God’s purposes for work, they become catalysts for transformed organizations, flourishing communities,
and a compelling witness to the Gospel.
His own journey has uniquely prepared him for this work. Before stepping into marketplace leadership
development, Mwangi spent nine years as a pastor at Nairobi Baptist Church, where he was ordained as a
Reverend and invested in developing emerging leaders. Earlier in his career, he founded and led several
start-up ventures and worked in marketing, giving him first-hand experience of both the opportunities and
challenges of living faithfully in the marketplace. This unique blend of entrepreneurship, business, ministry,
and leadership development has given him a deep passion for helping Christians bridge the divide between
Sunday faith and Monday work.
Mwangi holds a Bachelor’s degree in Business and Marketing and a Master’s degree in Biblical and
Theological Studies. He also serves as an Elder at Renewal Church, Nairobi, where he continues to teach,
disciple, and shepherd believers. He lives in Nairobi with his wife, Marion, and their two children.Precious Call Khamasi is a committed follower of Jesus Christ, a husband, father, pastor, teacher, and youth worker serving at Christ is the Answer Ministries (CITAM), Valley Road, Nairobi, Kenya. He currently provides leadership to the Youth and Teens Ministry, Creative Hearts ministry and the International Community Fellowship. Originally trained as a civil engineer, Call holds a Master of Arts in Biblical Studies from Africa International University. His ministry is shaped by a deep desire to see people, communities, and institutions formed by the truth of Christ so that they become places where others can flourish. He is especially passionate about the formation of the next generation and meaningful intergenerational engagement, regularly speaking in churches, schools, leadership forums, and conferences. Above all, his desire is to point people to Jesus Christ, in whom lasting hope and transformation are found.