Archbishop Timothy Nzyoki Ndambuki was born on the 4th of May 1954 in Vyulya Location (Masii), Machakos District. He is son of the late Philip Ndambuki Mwailu and Beatrice Nzisa Ndambuki The Archbishop gave his life to the Lord Jesus Christ as a teenager and was baptized in 1974. At the age of 14 years he started serving the Lord as a Sunday School Teacher. In 1979, he was elected a Church Elder and in 1986 he became a Lay leader. Between 1985 and 1988 he was the Youth Leader for Kangondi Sub-Pastorate and the Vice Youth leader of Mitaboni Pastorate.
In 1993 he heeded the “call” for full time Ministry. During his studies at St. Paul’s Theological Seminary, he was attached to Nairobi Sub-Headquarters for his Pastoral Practical Experience. In 1996, after completing his studies, he was posted to Kaiani Sub-Pastorate where he was ordained and became the Pastor in-charge overseeing eight (8) churches. After that, he served as the Pastor in-charge of Kakuyuni Sub-Pastorate overseeing nine (9) churches before he got transferred to Nairobi Sub-Headquarters which covers the present day counties of Nairobi, some parts of Machakos, Kajiado and Nakuru.
While serving in Nairobi Sub-Headquarters, he was also assigned to oversee the Cross-Cultural and Outreach /ministry of the Church. During that time he was instrumental in the tremendous Church growth in Tanzania, Rwanda, Uganda and Democratic Republic of Congo. He managed, together with Rev. Alden Crain, a Missionary from Canadian Baptist Ministries (CBM) to train over 100 Pastors including those in Divinity Schools in Cross-Cultural theology and experience. Often, the two (Timothy and Alden) travelled to bandit-prone areas of Uganda to give Spiritual guidance to the Kenyan Missionaries in that Country. The Fruit of their labor is present day ABC Church Moroto, among the Karamajong of Northern Uganda.
In the year 2006, Archbishop Ndambuki was ordained, as a Canon of the Africa Brotherhood Church and was deployed to help run the late Bishop Rt. Rev Dr. Nathan Ngala, the Founder Bishop, who was ailing. He was at the same time in charge of Iveti Sub-Headquarters consisting of 72 churches.
In October 2006, he was appointed the Deputy Bishop, a position he held until Bishop Ngala passed on and thereafter he was elected, consecrated and installed as the Bishop of Africa Brotherhood Church on the 15th April 2007.
Archbishop Ndambuki became a member of the National Church Council of Kenya (NCCK) in 2007 and has served in the same capacity ever since. In 2010, he was elected the Chair of the NCCK Lower Eastern Region and also sits in the NCCK Program Committee. In August 2012 he was elected as the National Vice Chairman of NCCK a position he currently holds. He also serves as the chairman of Lower Eastern Kenya Inter religious Forum.