Contact a Senior Advisor

A.C. Gonzalez

Email A.C. Gonzalez
Phone: 469-688-1661
(Serving Regions 4, 7, and 8)

A.C. Gonzalez has served communities throughout Texas for more than 37 years. During his career, he served as city manager of the cities of Dallas, San Marcos, Carrizo Springs, and Dilley. He holds a bachelor degree with honors from the University of Texas at Austin and a master in urban studies from Trinity University.

Bob Livingston

Email Bob Livingston
Phone: 214-212-8462
(Serving Regions 3, 4, and 10)

Bob Livingston is the first Senior Advisor and a Texas City Management Association (TCMA) life member. Bob served more than 23 years as the city manager of the City of University Park.

He has served as city manager in the cities of Santa Paula, California and Dodge City, Kansas. He also served as an assistant city manager in Highland Park, Illinois, and Lompoc, California. He holds a bachelor degree and a masters in public administration from the University of Kansas.

MARK MCDANIEL

Email Mark McDaniel
Phone: 817-773-6558
(Serving Regions 4, 6, and 9)

Mark McDaniel has served Texas cities since 1985. He retired as the city manager of the City of Kerrville on June 1, having worked at the City since 2017. Mark Served as the 2006 TCMA president. He holds a bachelor's degree in political science and a master's degree in public administration from the University of North Texas.

George Shackelford

Email George Shackelford
Phone: 903-748-5222
(Serving Regions 5 and 6)

George Shackelford has served communities throughout Texas since 1979. During his career, he served as city manager of the cities of Littlefield, Port Lavaca, Texarkana, and Tomball. George holds a bachelor’s degree in criminal justice administration and a master’s degree in social science with an emphasis in public administration. Both degrees were completed at West Texas State University.

Greg Vick

Email Greg Vick
Phone: 214-477-8413
(Serving Regions 2 and 4)

Greg Vick has served communities throughout Texas since 1976. During his career, he served as city manager of the cities of Gladewater, Cedar Hill, Elgin, and Watauga. Greg holds a bachelor’s degree from Abilene Christian University and a master’s degree from the University of North Texas.