Administrative Team

MS. BECKY THIESSEN
Associate Principal

Becky Thiessen joins the Shawnee Mission South team after serving as a Mathematics teacher at Wichita South High School, Ravenwood High School in Nashville, TN and Olathe Northwest High School. Ms. Thiessen received her BS in Secondary Education, Mathematics from Kansas State University, Her Master of Public Policy from the University of Minnesota and her Master of Educational Administration from Emporia State University.

Ms. Thiessen  serves as the associate principal for special education and CTE; she is also the administrator for students with the last names starting with A through G.

Ms. Nancy Tynon
Associate Principal

Nancy Tynon is excited to join the Shawnee Mission South Raider family, as an Assoc. Principal, this fall. It will be Nancy’s 26 year in education. She has served as a secondary Assoc. Principal for 14 years. Prior to becoming a building administrator, Nancy taught high school and middle school ELA for 11 years. While teaching ELA, she sponsored several student activities, such as cheer, pep-club and the student literary-magazine.

Nancy earned her bachelor’s degree from the University of Nebraska with a major in Psychology and a minor in English. Nancy received her teaching degree in English from Rockhurst University. She, also, attended UMKC, where she earned her Master’s degree in Ed. Leadership.

Nancy serves as the associate principal for activities; she is also the administrator for students with the last names starting with F through M.

DR. Justin Bogart
Associate Principal

Justin Bogart joins the Shawnee Mission South team after serving as associate principal at Leavenworth High School since 2015. Prior to becoming an administrator, Bogart taught English language arts in the De Soto school district for 20 years - 5 years at De Soto High School and 15 years at Mill Valley High School where he was also the head boys basketball coach. 

Bogart earned his Bachelor's degree from the University of Kansas in 1994 and Master's of School Leadership  in 2001 and his Doctorate degree in District Leadership in 2019 both from Baker University.

Justin will serve as the associate principal for curriculum and instruction; he will also be the administrator for students with last names starting with N through Z.

Mr. Mark Mahoney
Athletic Director

Mark Mahoney joins the Shawnee Mission South Raider family after serving as a Physical Education teacher and Department Chair at Olathe Northwest.  Mr. Mahoney also served as the ONW Head Softball Coach, Assistant Football Coach and Assistant Basketball Coach. Mark received his education at Fort Hays State University, where he earned his Bachelor's in Healthy/Physical Education and his Masters in Educational Leadership.  He also earned his Master's Degree in Health Science from the University of Alabama.

Mark serves as the Athletic Director at Shawnee Mission South.