“Protecting Our Future”
The Southside ISD Police Department currently has officers assigned to the department. The Chief and Sergeant oversee the department administration and operations. Officers have extensive, knowledge, training and experience dedicating it to the Southside ISD, students, administrators, staff, parents and community.
- Sgt. Issac Martinez #102Police DepartmentSergeantSgt. Isaac Martinez is currently assigned to supervisory duties for the Southside ISD Police Department and has been with the police department for 3 years. Officer currently holds a Master Texas Peace Officer certificate, is an FTO, Firearms Instructor, Police Officer Instructor and mental health officer. Sgt. Has over thirty years of law enforcement experience serving in the US Coast Guard as an AVT (Aviation Survival Tech), MES (Maritime Enforcement Specialist) which include search and rescue swimmer, small boat operator and law enforcement. Officer has also served with the Bexar County Sheriff’s Office and US Border Patrol. Officer dedicates his training, experience and knowledge to the children of the Southside ISD community, our future. He often quotes “CRAFT LIFE, DON’T LET LIFE CRAFT YOU”
- Officer Oscar Gonzalez #105Police DepartmentA.C.E.S. Police OfficerOfficer Oscar Gonzalez is currently assigned to the Aces 9th Grade Academy. He has been a Texas peace officer for nineteen years. He is also an armed forces veteran who served in the US Army during operation desert storm. Officer has served in a law enforcement capacity with the Texas Department of Corrections where he worked in Huntsville Texas, and later transferring to Dilley TX. He attended the Police academy in Uvalde, TX in 1995 while pursuing his associate’s degree in Criminal Justice. His law enforcement experience, knowledge and training have taken him to various departments municipal, city, county and state. His dedication to law enforcement, Southside ISD and community are unsurpassed.
- Officer Scott Powell #108Police DepartmentSouthside HS Police OfficerOfficer Scott Powell has been employed with the Southside ISD Police Department for 12 years. He is currently assigned to Southside High School and is our Police Investigator and FTO. He is also the Police Explorer Instructor who has been successful in winning several State competition awards. He has 22 years’ experience in law enforcement, 4 years as Police Dispatcher / Reserve Officer and 18 as a full time Police Officer. Officer currently holds a Master Peace Officer Certificate. Officer Powell brings extensive experience and knowledge to the Southside ISD Police Department and Southside ISD. We are fortunate to have an officer with such a valuable amount of experience, knowledge and dedicated service.
- Officer Ruben Cardenas #110Police DepartmentFreedom Elementary Police OfficerOfficer Ruben Cardenas is currently assigned to Freedom Elementary Officer has a total of 23 years of Law Enforcement experience, 15 years in Corrections and 8 years in Policing. Officer Cardenas also served 8 years in the U.S. Army Reserves. He has had the opportunity to work numerous positions throughout his Law Enforcement career, including a total of 12 years in a supervisory role. Officer Cardenas is glad to be part of the Southside ISD family and Community. Officer Cardenas currently holds an Intermediate Peace Officer License.
- Chief of Police Don TijerinaPolice DepartmentChief of Police Don Tijerina started his career in law enforcement with the Bexar County Sheriff’s Office in 1992. Chief Tijerina rose through the ranks, from Detention Officer to Law Enforcement Captain, working first in Detention and then in numerous law enforcement assignments including Court Security, Patrol, Criminal Investigations, Criminal Warrants and as the Commander of the Internal Affairs/Professional Standards and Integrity Division. Chief Tijerina retired in 2019 as the Chief Deputy, the second in command and highest non-elected position in the Sheriff’s Office. In his role as Chief Deputy, he directly assisted the Sheriff of Bexar County to oversee an agency of approximately 1,800 personnel with an annual budget of approximately 160 million dollars. [full-bio] Chief Tijerina is a graduate of the FBI National Academy, the International Association of Chiefs of Police (IACP) – Leadership in Police Organizations Program, the Federal Law Enforcement Training Center (FLETC) / HAPCOA Leadership Program, the Greater San Antonio Chamber of Commerce Leadership San Antonio - Class 31, the San Antonio Hispanic Chamber of Commerce Alex Briseno Leadership Development Program, the Bexar County Leadership Development Program and has earned his bachelor’s degree. Chief Tijerina currently serves on the National Board of Directors of the Hispanic American Police Command Officers Association (HAPCOA). In his capacity as a past National President of HAPCOA, Chief Tijerina submitted written testimony to the President’s Task Force on 21 st Century Policing and together with other associations, offered recommendations. The Chief also offered input on guidelines for the Department of Justice Community Oriented Policing Services (DOJ COPS) 2017 COPS Hiring Program and has been included in numerous DOJ summits related to Officer Resilience and Wellness, Hate Crime Reporting, Border Security, and Diversity and Inclusion in Law Enforcement. Chief Tijerina has long supported diversity and inclusion efforts and is a dedicated member of several affinity diversity groups including the National Organization of Black Law enforcement Executives (NOBLE) and Women in Federal Law Enforcement (WIFLE). Chief Tijerina is a proud veteran, retiring from the United States Air Force and the Texas Air National Guard with over 21 years of service.