McKenzie Clark was born and raised in Greensboro, NC, but has always had ties to the Cumberland Valley. His maternal grandmother attended Carlisle High School, and three of his aunts still live in Mechanicsburg.

McKenzie graduated from Wake Forest University in 2007 then served as a Peace Corps Volunteer in Kazakhstan for three years, teaching English and American Culture. He moved to Carlisle in 2011 to attend the Dickinson School of Law, and he now operates a solo practice representing clients in family and criminal law matters. He also serves as a Judge Advocate in the U.S. Army Reserve.

McKenzie and his wife, Katie, have been members of UUCV since 2013, and they were married in March 2014 by Rev. Aija. They have two children, Rory (6) and Grant (3).