Ms. Humphrey was elected to serve her fifth term on the Plano ISD Board of Trustees in May 2025. She was elected by her fellow trustees to serve as vice-president for the 2025-26 school year, and she has served in key roles throughout her fifteen years on the board. During her presidency in 2014-2015, the Board of Trustees was named an Outstanding School Board in Region 10 and one of five finalists in the state. She was also president of the board in 2024-25 when the board was named a Top 5 School Board by the H-E-B Excellence in Education Awards.

Ms. Humphrey is chair of the Plano ISD Board’s legislative subcommittee, serves on the School Safety and Security Committee and is a liaison to the City of Richardson and City of Plano. She serves on the Richardson Chamber of Commerce Board and its Workforce Committee. In 2015, she and her fellow legislative subcommittee members created Taxparency Texas to create awareness about the need for school finance reform. She frequently advocates for public schools at the state capitol during legislative sessions.

She is active with North Texas Area Association of School Boards (NTAASB) and Texas Association of School Boards (TASB), serving on the Legislative Advisory Council. She graduated in the Leadership TASB Class 2015 as a Master Trustee.

As an active PTA volunteer and booster volunteer when her children were Plano ISD students, she received a Texas PTA Honorary Life Membership in 2006. In 2012, she received the Texas PTA Extended Service Award.