Miki is originally from Waycross, Ga., and graduated from the University of Georgia with a master’s degree in accounting. She also has a master’s in divinity from Asbury Theological Seminary. She and her husband, Charlie, have three children: Isabel, Jasper, and Celia. 

In 2009, Miki and her family moved into full-time roles as missionaries with TMS Global. They lived and served for 10 years in St. Petersburg, Russia; Tallinn, Estonia; and Torino, Italy. During that time Miki, worked with various congregations in the areas of prayer ministry, spiritual development, and discipleship. The Chastains also served with at-risk children and refugees coming into Europe primarily from Middle-Eastern and North-African nations, many of whom were fleeing violence and poverty or famine.

Before coming to Oconee Street UMC, Miki’s previous appointments were as associate pastor at Acworth UMC in Acworth, and as Pastor-in-Charge at New Prospect UMC in Buford and at Bogart UMC in Bogart.