Tim Jackson serves as the Express’ General Manager and oversees all day-to-day business and baseball operations related to the organization. He also works closely with the team President on all Express sales efforts.

A native of Cedar Hill, Texas, Jackson joined the Express staff in March 2010 and served as the Assistant Director of Communications and Baseball Operations for three seasons before receiving promotions to Director of Community Relations in 2013 and Assistant General Manager, Baseball Operations in 2014. Jackson has served as the team’s General Manager since 2015.

Prior to his tenure in Round Rock, Jackson served as the Director of Baseball Operations for the Baylor Baseball program in Waco, Texas, while earning his Master of Science degree in sport administration.

Prior to joining Baylor's staff, Jackson played two seasons for the Bears. A 2007 team co-captain, Jackson was named second-team CoSIDA/ESPN Academic All-District VI as a senior. He also earned first-team Academic All-Big 12 Conference honors in 2007 and was named to the Big 12 Conference Commissioner's Honor Roll five times. Jackson earned his undergraduate degree (communications) from Baylor in August 2008.

Jackson also played two seasons at McLennan Community College in Waco (2004-05), where he was named a 2005 Academic All-American.

Jackson serves on the Board of Directors of the Round Rock Chamber of Commerce and the Austin Sports Commission and is a board member of the Round Rock Rotary Club. He also serves as Board President of the Baylor "B" Association. In 2016, Jackson was named a finalist for the Austin Under Forty Awards.

Jackson resides in Round Rock with his wife, Patty, and their two daughters: Emma and Audrey.

Walk-up song: Bad To the Bone – George Thorogood

Caitlin Kurtz was named the Nolan Ryan Foundation Programs Coordinator in September 2025 after initially joining the Foundation as a Fundraising Support Intern in July 2025.

Kurtz hails from Sugar Land, Texas where she graduated from George Ranch High School. She went on to earn a bachelor's degree in Kinesiology & Health, Sport Management and Psychology from the University of Texas. During her four years as a Longhorn, she served as a Development Intern with Texas Athletics and was a member of Texas Baseball Diamonds and Ignite Texas.

RBI Austin, CPATH Texas and Austin State Supported Living Center are all local entities that Kurtz volunteered her time with prior to joining the Nolan Ryan Foundation. She was a member of Phi Beta Kappa during her time as a student and earned multiple academic honors, including American Kinesiology Association Undergraduate Student of the Year and was a College Scholar University Honors Recipient.

Kurtz enjoys supporting the Texas Longhorns, especially the football, basketball, baseball and volleyball programs, and in her spare time likes to spend time with her family and friends, go to the movies and try new restaurants.

Walk-up song: If You're Gonna Play in Texas (You Gotta Have a Fiddle in the Band) – Alabama

Aurelio Martinez has been with the Round Rock Express since April 2001 and has been a critical piece to the success of Dell Diamond.

Prior to joining the Express, Martinez spent 10 years as a Machinist for Carr Lane Manufacturing. When he joined the E-Train in 2001, he “fell in love with this place.” Martinez credits his success to the incredible people he works with and his love for being outdoors.

His favorite memory is one that the Express front office is thankful for. In 2005, Martinez received a phone call that the home run porch had caught fire. He raced over with a fire extinguisher and put out the flames. It’s this kind of hard work and effort that his colleagues have come to know and love.

Martinez and his wife, Lori, have two daughters, Angela and Rebecca, and a step son, Anthony.

Walk-up song: Don’t Stop Believing – Journey

Jacob Waters was named the Coordinator, Stadium Operations & Facilities in March 2026 after serving as the Stadium Operations Intern for the Columbus Clingstones in 2025.

Originally from Milton, Florida, Waters attended the University of West Florida and earned his bachelor's in Sports Management. While in school, Waters was a student assistant for the football team.

Waters enjoys cheering on the Alabama Crimson Tide and Atlanta Falcons.

Walk-up song: Tom Sawyer – Rush