EMS Chief

Jason Mabbitt

Jason began his career in EMS in 1993. He has worked in almost every position in EMS to include EMT, Paramedic, Field Training Officer, Quality Assurance Officer, Clinical Manager, Operations Manager and is now the EMS Chief for Schertz EMS. Jason has been with the City since 2006. His undergraduate work was in Emergency Health Science where he graduated Summa Cum Laude from the University of Texas Health Science Center in San Antonio. His graduate work was in Public Administration with a concentration in leadership and financial management where he graduated from the University of Texas Permian Basin with a Masters in Public Administration. He is married to his beautiful wife Michelle and they have three amazing daughters; Hayden, Morgan and Reagan.

Jason began his career in EMS in 1993. He has worked in almost every position in EMS to include EMT, Paramedic, Field Training Officer, Quality Assurance Officer, Clinical Manager, Operations Manager and is now the EMS Chief for Schertz EMS. Jason has been with the City since 2006. His undergraduate work was in Emergency Health Science where he graduated Summa Cum Laude from the University of Texas Health Science Center in San Antonio. His graduate work was in Public Administration with a concentration in leadership and financial management where he graduated from the University of Texas Permian Basin with a Masters in Public Administration. He is married to his beautiful wife Michelle and they have three amazing daughters; Hayden, Morgan and Reagan.

Assistant EMS Chief - Operations

Tyler Bowker

Tyler began his career with Schertz EMS in November of 2016 as a field Paramedic. Tyler was promoted to the MIH Paramedic and is now the Community Health Coordinator since December 2018. Prior to his career with Schertz EMS Tyler was a Firefighter for the Bracken Fire Department where he started volunteering in 2004 and was hired as a paid Firefighter in 2007. Tyler obtained his Paramedic certification and was promoted to a Lieutenant in 2014. Tyler still works at Bracken Fire Department as a part-time Firefighter/Paramedic. Tyler has his Associate of Applied Science - Paramedic degree and is looking to continue his undergraduate in Public Health at the University of Texas at San Antonio. Tyler is married to his wife Kelly, and they have two children Easton and Ella.

Tyler began his career with Schertz EMS in November of 2016 as a field Paramedic. Tyler was promoted to the MIH Paramedic and is now the Community Health Coordinator since December 2018. Prior to his career with Schertz EMS Tyler was a Firefighter for the Bracken Fire Department where he started volunteering in 2004 and was hired as a paid Firefighter in 2007. Tyler obtained his Paramedic certification and was promoted to a Lieutenant in 2014. Tyler still works at Bracken Fire Department as a part-time Firefighter/Paramedic. Tyler has his Associate of Applied Science - Paramedic degree and is looking to continue his undergraduate in Public Health at the University of Texas at San Antonio. Tyler is married to his wife Kelly, and they have two children Easton and Ella.

Assistant EMS Chief - Clinical

Mike Shown

Mike has been involved in public safety since 1986, starting as a volunteer with Bexar County Fire Corps, Company #4. Since that time, he has worked as an EMT, Firefighter/Paramedic, Flight Paramedic, Deputy Sheriff, PI/Education Coordinator and is currently the Division Chief of Clinical Services for Schertz EMS as well as a Deputy Fire Marshal with Guadalupe County. He completed his undergraduate studies in Emergency Health Science at the University of Texas Health Science Center in San Antonio. His graduate studies were in public administration with an emphasis on emergency management. He graduated in 2022 from Columbia Southern University with a Master of Public Administration degree. He is married to his wife Cindy and they have two daughters, Kayla and Kendall.

Mike has been involved in public safety since 1986, starting as a volunteer with Bexar County Fire Corps, Company #4. Since that time, he has worked as an EMT, Firefighter/Paramedic, Flight Paramedic, Deputy Sheriff, PI/Education Coordinator and is currently the Division Chief of Clinical Services for Schertz EMS as well as a Deputy Fire Marshal with Guadalupe County. He completed his undergraduate studies in Emergency Health Science at the University of Texas Health Science Center in San Antonio. His graduate studies were in public administration with an emphasis on emergency management. He graduated in 2022 from Columbia Southern University with a Master of Public Administration degree. He is married to his wife Cindy and they have two daughters, Kayla and Kendall.

Medical Director

Dr. Butter

Dr. Donovan Butter has been the medical director for Schertz EMS and surrounding communities since 1992. He received his Bachelor of Science with honors from Texas State University and Doctorate degree from North Texas State University Health Science Center at Fort Worth. Post graduate training was at Corpus Christi Osteopathic Hospital, Brooke Army Medical Center and Driscoll Children's Hospital. Board certified in emergency medicine and family medicine as well as undersea and hyperbaric medicine, Dr. Butter has practiced emergency medicine since 1987 and hyperbaric and wound care medicine since 1999. He is currently the medical director at Christus Santa Rosa Westover Hills Wound Care Center and the chief of hyperbaric medicine and limb salvage. Previously, Dr. Butter served as Adjunct Assistant Professor at UT Health Science Center at San Antonio as well as chairman of the Texas EMS Advisory Council to the Texas Department of Health and Human Services and was assistant EMS medical director for San Antonio Fire and EMS from 1990 to 1995. Prior to his medical education, Dr. Butter also served as a Paramedic with several EMS systems in Texas and developed a long-standing love and appreciation of our EMS and public service first responders that serve and protect the public welfare. He was the recipient of the Texas EMS Medical Director Award for personal and professional dedication to EMS in Texas in 1994. Dr. Butter is married to his wife Rita and enjoys spending time with family and friends. He is a fifth generation Texan and likes to travel across Texas.

Dr. Donovan Butter has been the medical director for Schertz EMS and surrounding communities since 1992. He received his Bachelor of Science with honors from Texas State University and Doctorate degree from North Texas State University Health Science Center at Fort Worth. Post graduate training was at Corpus Christi Osteopathic Hospital, Brooke Army Medical Center and Driscoll Children's Hospital. Board certified in emergency medicine and family medicine as well as undersea and hyperbaric medicine, Dr. Butter has practiced emergency medicine since 1987 and hyperbaric and wound care medicine since 1999. He is currently the medical director at Christus Santa Rosa Westover Hills Wound Care Center and the chief of hyperbaric medicine and limb salvage. Previously, Dr. Butter served as Adjunct Assistant Professor at UT Health Science Center at San Antonio as well as chairman of the Texas EMS Advisory Council to the Texas Department of Health and Human Services and was assistant EMS medical director for San Antonio Fire and EMS from 1990 to 1995. Prior to his medical education, Dr. Butter also served as a Paramedic with several EMS systems in Texas and developed a long-standing love and appreciation of our EMS and public service first responders that serve and protect the public welfare. He was the recipient of the Texas EMS Medical Director Award for personal and professional dedication to EMS in Texas in 1994. Dr. Butter is married to his wife Rita and enjoys spending time with family and friends. He is a fifth generation Texan and likes to travel across Texas.