Along with Sol Casseb, Mark was one of two judges in the band. Mark was a former State Criminal District Court Judge and an Assistant District Attorney for many years. He has been an attorney in San Antonio for over 30 years is now in private practice. Mark began playing guitar and bass guitar at an early age and has played in several local bands throughout the years. He is also an accomplished vocalist. Mark was the bassist and one of the lead vocalists for the band from September of 2005 to April of 2013.