M'Lissa M. Chumbley was first elected to the Board in 1995 and currently serves as the Vice President of the Board. She also is a member of the Academics and Building committees and has served as the Board's President, Secretary, and Parliamentarian.

She is a former President of the Northside Council of PTAs and is an Honorary Life Member of both the National and Texas PTAs. Chumbley served as Chairwoman of the Los Leones Student Arts Festival, served on the Vision 2012 Committee for the city of Leon Valley, and received the Time-Warner Hometown Hero Award for community service.

Chumbley is a recipient of the Honorary Chapter Award from the O'Connor High School Future Farmers of America as well as the Honorary Lone Star Farmer Degree from the Texas FFA Association for her commitment to youth in agriculture. Chumbley also is a Life Member of the San Antonio Livestock Exposition.

She is a graduate of Marshall High School, attended Texas A&M University, and is a 26-year employee at USAA. She and her husband, Steve, have four sons: Boot and Ty, both graduates of Texas A&M; Chance, a senior at Texas A&M; and Colton, a student in Northside. The Chumbleys are active members of St. Luke's Catholic Church.