TERRELL, TX — Mike Sims, who has served as Terrell’s City Manager since 2019, has announced his retirement following 17 years with the City. The announcement was made official during the May 6 City Council meeting, where Assistant City Manager Mark Mills was appointed to serve as Interim City Manager. Sims will remain in his role through May 20 to assist in the transition.
Sims joined the City of Terrell in 2008 as Assistant City Manager after working for 15 years at the North Central Texas Council of Governments. He was involved in several city planning efforts during his time, including the 2017 Downtown Plan, Park Plan, and Comprehensive Plan. He also oversaw public-private partnerships related to retail development and infrastructure.
Though Sims maintained support from city officials, public opinion about his tenure has often been mixed. His management style and development priorities drew criticism from some residents, particularly during periods of rapid change and growth.
Mayor Rick Carmona thanked Sims for his service and acknowledged his role in navigating the city through complex issues. “He has led the City through some challenging times during an era of unprecedented growth. On behalf of the Council, we wish him all the best,” Carmona said.
Sims began his public service career after participating in a high school mentorship program through the Denton City Manager’s Office. He holds degrees from Indiana University and the University of Texas at Arlington. He and his wife, Sarah, have seven children and are active members of First Baptist Church of Terrell.
Incoming Interim City Manager Mark Mills joined the city in late 2023. In a brief statement, Mills said he looks forward to the opportunity to serve and thanked the Council for its confidence.
With this leadership change, the City of Terrell enters a new phase, one that many residents hope will bring renewed focus on transparency, community priorities, and balanced growth.