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Office of the Superintendent

Mark Ernst

Superintendent
Dr. Mark Ernst


Dr. Mark Ernst currently serves as Superintendent of Schools for Tooele County School District; before this role, he was an assistant superintendent, area director, principal, assistant principal, and teacher.   

Dr. Ernst earned his Bachelor's degree at Weber State University in History Education, his Master's at the University of Phoenix in Secondary Teaching, and his Doctor of Education in Leadership and Professional Practices from Trevecca Nazarene University in Nashville, Tennessee.  

Dr. Ernst is a TCSD Teacher of the Year Finalist (2006), TCSD Administrator of the Year (2012), and a Utah State Administrator of the Year Finalist (2014).               

Dr. Ernst is married to his wife Julie; they have three children, five granddaughters, and one grandson. Along with spending time with his family, Mark enjoys cooking, reading, building Lego, and relaxing with a good television show.             

Dr. Ernst looks forward to assisting Tooele County School District in improving practices and enhancing students' education. 

Sarah Jarnagin

Assistant Superintendent of Operations and Student Support
Dr. Sarah C. Jarnagin

Dr. Sarah C. Jarnagin is a seasoned K–12 executive leader with more than 30 years of experience across Texas, Idaho, and Utah. She has served as a principal, district administrator, and university faculty member, providing leadership in K–12 school oversight, curriculum and assessment systems, districtwide programming, school safety, and principal supervision.

Dr. Jarnagin has led complex, system‑level initiatives, including the planning and opening of new schools at all levels, district boundary realignments, and the leadership of athletics and activities programs. She has developed staffing formulas that ensure equitable, efficient, and fiscally responsible allocation of resources across schools and departments. Her work also includes guiding instructional improvement efforts, MTSS and RtI development, professional learning systems, and long‑range strategic planning.

She holds an Ed.D. in Educational Leadership from Sam Houston State University.

Cody Reutzel

Assistant Superintendent of Academics
Dr. Cody Reutzel

 

 

Dr. Cody Reutzel currently serves as the Assistant Superintendent of Academics in Tooele County School District (TCSD). Over the past decade, he has held a variety of leadership roles within the district and beyond, including multiple director positions at the district level, principal, assistant principal, and athletic director. Prior to his administrative career, Dr. Reutzel was a junior high and high school classroom teacher and football coach.

Dr. Reutzel earned his Ph.D. in Curriculum and Instruction from Utah State University in 2023, with an emphasis in Instructional Leadership. He also holds a Master of Science in Engineering and Technology Education (2008) and a Bachelor of Science in the same field (2007), both from Utah State University, where he graduated Magna Cum Laude and was twice named Student of the Year in the department. Dr. Reutzel has shared his work at national conferences, including the American Educational Research Association (AERA) and the International Technology Education Association (ITEA), and published articles on targeted reading and math interventions in the Impact Journal and the Utah Mathematics Teacher Journal.

Outside of his professional responsibilities, Dr. Reutzel finds his greatest joy in spending time with his children—especially outdoors. Whether cheering them on from the sidelines of their athletic events or exploring Utah’s backcountry on a snowmobile, he values every opportunity to support and adventure with his family.

Dr. Reutzel is committed to advancing educational excellence in Tooele County School District through supportive systems, meaningful feedback, and a relentless focus on student and staff development.

Jacqualine Gallegos

Titles: Administrative Secretary to Superintendent
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Suzanne Medina

Titles: Administrative Secretary
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Archived Superintendent's Annual Reports