Varsity Head Coach

The 2025-2026 school year will be Coach Warnock’s second year teaching English II, and her first year teaching and coaching at Vandegrift. She has always had a passion for both education and cheer, and is super excited to start her “dream job!” She cannot wait to make memories and have a wonderful year.

Coach Warnock has been involved in cheerleading for most of her life, with nine years of competitive cheer experience and six years of sideline cheer. She brings both NCA and UIL experience to the program, and she is passionate about helping athletes grow not only in their skills, but also in confidence, teamwork, and leadership.

She grew up right here in the Austin area and graduated from Vista Ridge High School, where her love for both cheer and student leadership flourished. She was also very involved in student ministry at Northpoint Church, which shaped a lot of who she is today. After high school, she went on to attend college at Mississippi State University. Hail state!  She graduated with a degree in Secondary English Education.

Coach Warnock is married to her middle school sweetheart (yes, you read that right, ha!) and they live here in Austin with their golden retriever, Bear. Sydney is incredibly honored to step into this role and can’t wait to work with the amazing athletes and families at Vandegrift High School. Go Vipers!

Mackenzie Singer

JV Cheer Coach

Mackenzie Singer is a proud graduate of Baylor University, where she earned a Bachelor of Science in Cell and Molecular Biology. Sic ‘em Bears! She grew up in the Chicago suburbs and her family moved down to Austin, Texas in 2019. 

The 2025-26 school year will be Coach Singer’s second year at Vandegrift High School. During the 2024-25 school year, she served as the school’s permanent substitute and volunteered with the cheerleading team. Before transitioning into education, she worked in the dental field as a dental assistant and was on the path to dental school before discovering her true passion for teaching and coaching.

Coach Singer brings over six years of cheerleading experience, including both all-star and school cheer, as well as four years of coaching during her time in high school. Her goal is to help athletes develop confidence, character, and a strong sense of community while creating lasting memories and having fun.

Coach Singer is thrilled to continue supporting the Vandegrift cheerleaders and is looking forward to this next season. Go Vipers!