Directory

Mark Scheibmeir joined the St. Mark’s faculty in 2022 as a film studies teacher in the Fine Arts Department. He previously served as an arts educator and coach at OTM Acting Studio in Los Angeles and taught at the University of Texas at Austin. Scheibmeir maintains an active role in the entertainment industry as an actor, writer, director and producer. He sponsors the Film Club and serves as a ninth-grade adviser. He earned B.S. and M.F.A. degrees from the University of Texas at Austin. 

Holding two master’s degrees (in choral conducting and library and information services), Tinsley Silcox serves as both director of Library and Information Services and Upper School choir director. A native Tennessean, he has studied at  Carson-Newman University, the University of Tennesse and Harvard University’s graduate school of education. His former positions include director of Public Services for Central University Libraries at Southern Methodist University in Dallas, director of the Hamon Fine Arts Library and director of the G. William Jones Film and Video Collection at SMU. He has also served as director of the Blues Archives, music librarian and assistant professor at the University of Mississippi, and acting head of the George F. DeVine Music Library at the University of Tennessee. Silcox’s articles have appeared in such journals as Living Blues, Mississippi Libraries, Legends and Fontes Artis Musicae. He also serves the Dallas community as choirmaster at NorthPark Presbyterian Church.

Serving as organist and choirmaster, Glenn Stroh has been a member of the St. Mark’s community since 2011. He earned a bachelor of music degree from Trinity University, a master of music from the Oberlin Conservatory of Music in Ohio and a Aufbaustudium-A degree from the Hochschule für Musik Franz Liszt. Stroh has performed across the United Staes and Europe as a solo artist, accompanist and conductor. As a church musician, he has served numerous music programs including Saint Michael and All Angels Episcopal Church and the Church of the Transfiguration in Dallas, the historic Old Stone Church on Cleveland’s Public Square, and Trinity Cathedral of Cleveland. A recipient of the Fulbright Study/Research Grant based at the Hochschule für Musik Franz Liszt in Weimar, Germany Stroh sponsors SMacappella and the Organ Club and was a Ralph B. Rogers Alumni Award finalist in 2022. He received the John H. Murrell Excellence in Teaching award in 2017 and is a member of the Association of Anglican Musicians, the American Guild of Organists, Royal School of Church Music, the American Choral Directors Association and the Texas Choral Directors Association.

Mark Sullivan joined the St. Mark's School of Texas faculty in 1982 as the Lower School Physical Education Coordinator. Prior to his appointment as the Director of Athletics and Physical Education in 2000, Mark has served the school as the Wilderness Program Director, the Assistant Head of the Middle School and as a coach and teacher in the Athletic Department. Mark holds a Bachelor of Science Degree and a Masters Degree in Educational Administration from the University of North Texas, and is a recipient of the John H. Murrell Excellence in Teaching Award. Mark's coaching has included numerous Middle School sports as well as the Varsity Volleyball team and the Varsity Diving team.