Directory

The varsity head basketball coach since 2006, Greg Guiler has the distinction of being the all-time leader in career wins among the School’s many storied athletic programs. He joined the St. Mark’s faculty in 2005 and currently serves as a teacher and coach in the Athletics Department, where he has also served as head golf coach since 2016. He has been a head coach in the lacrosse, baseball, and football programs at various sub-varsity levels and has taught physical education across the Lower, Middle and Upper and School divisions. Dad to Cooper ‘26, he earned a Bachelor of Arts degree from Cedarville University and a master’s degree in cross-cultural studies from the Dallas Theological Seminary. Guiler received the John H. Murrell Excellence in Teaching Award in 2013 and was named a finalist for the Ralph B. Rogers Alumni Award in 2011. The Texas Association of Basketball Coaches twice honored him as Coach of the Year (2007 and 2020) and he was named Texas private schools Most Outstanding Coach in 2013. His 2020-21 varsity basketball team was the first in the history of the Southwest Preparatory Conference to be ranked #1 among all schools in Texas and in the Top 25 nationally.