Mayor Greg Contreras and his wife of 43 years, Karen, have lived in Duncanville for 44 years, where they raised their three children. All three attended Duncanville Independent School District schools, beginning at Fairmeadows Elementary and graduating from Duncanville High School. The Contreras family are longtime congregants of Holy Spirit Catholic Church.

Mayor Contreras dedicated 30 years of service to the City of Duncanville, retiring in 2019. During his career, he managed Building, Code Enforcement, and Health operations, serving as the City’s Building Official for 25 years. He also worked closely with the community as staff liaison to the Zoning Board of Adjustment, Sign Control Board, and Economic Development Commission. In addition, he served as Interim City Manager (2012–2013) and Interim Assistant City Manager (2013–2014).

Elected roles include serving as District 5 City Council Representative (2021–2024) and, beginning in 2024, as Mayor of Duncanville.

Mayor Contreras’s professional affiliations reflect his long-standing leadership in municipal management and building safety. He was appointed to the Texas State Board of Plumbing Examiners (1996–2000), serving as Board Chairman from 1999 to 2000. At the University of Texas at Arlington, he contributed to the Construction Research Center, Civil Engineering Department (Executive Board Member, 1995–2019; Chairman), and the Building Professional Institute (Moderator, 1998–2019; Co-Chair, 2010–2017). He was also an active member of the Building Officials Association of Texas (2001–2019) and the Property Improvement Program (2018–2024).

Mayor Contreras’s current community involvement includes serving on the Board of Directors for Trauma Support Services (2014–present; Board Chairman, 2020–2024), as well as active membership in the Lions Club (2020–present) and Rotary Club (2020–present).