Unbeknownst to Milledge Mosby, his journey toward the ministry began in 1973 while attending the Detroit Unity Temple. He served as a volunteer at the church under both Rev. Glenn Mosley, and then Rev. David Williamson.

In pursuit of business opportunities, Milledge, along with his wife, Pamela, and their young family, moved to Maryland in 1978. There, they attended Unity of Washington, D.C. The minister, George Stone, asked Milledge to work for the church on a part-time basis as Business Manager. When Rev. Stone moved on to another assignment, he was replaced by Rev. Amalie Frank. Under Rev. Frank's tutelage and coaching, Milledge began teaching classes, in addition to serving as the church Business Manager.

Milledge began formal study toward becoming a Licensed Teacher in 1988 by attending classes at Unity Village in Missouri. In 1989 Rev. Frank and the board of trustees asked Milledge to accept the position of Assistant-to-the-Minister. He held that position until a growing demand for a Unity Center in Bowie, MD. encouraged him to leave where he started the Unity Center of Light. In 1997, after completing a four year program in the Unity Field Licensing Program, Milledge became an ordained minister of the Unity Church.

In addition to his work in the ministry, Rev. Mosby has been a Professor of Marketing and Sales at Prince George's Community College since 1980. In his own life, he demonstrates what he teaches with his disciplines in a variety of activities that include: bodybuilding, jogging/cycling, photography, doing research and continuous learning. These activities help him to continue to grow spiritually, mentally and physically.