Josiah was born in Ngomeni, Kenya, a small village of about a thousand people where his father was/is a pastor. Josiah completed his undergraduate studies at Kenyatta University in Kenya and earned his Masters of Divinity from Reformed Theological Seminary in Orlando in 2011. During his time at seminary in Orlando, Josiah served as Youth and Music Leader at Covenant Presbyterian Church. He has served as the Associate Pastor of Community Life and Music Director at Treasure Coast Presbyterian Church. He also served as the Senior Pastor of Grace Reformed Presbyterian Church. He is currently the Senior Pastor at New City East Lake in Chattanooga, TN. Josiah is the Founder and President of the Christian Resource Center of Kenya.