Tilly Mack is a Pennsylvania native who earned her degree in political science from Gettysburg College. 
    She served as a legislative assistant in the U.S. House of Representatives for two Members of Congress in Washington, DC before becoming a stay-home mom. 
    Tilly was active in many parent and community activities, such as PTA. She was also co-owner of an academy in Southlake that taught adults and children the Olympic sport of fencing.  After her children went to college, she became a manager at retail decorating company Robb & Stuckey, before coming to GCISD as administrative assistant to the principal at Timberline Elementary School.  She came to CMS in 2011 in the same role. 
    Tilly and her husband of 32 years live in Colleyville and are proud parents of three grown children, all of whom attended CMS.