The Marine Corps JROTC (MCJROTC) program at Tolleson Union High School is a leadership education program that instills in high school students a value of citizenship, service to the United States, personal responsibility, and a sense of accomplishment. The JROTC program prepares high school students for responsible leadership roles while making them aware of their rights, responsibilities, and privileges as American citizens. Lessons in leadership, self-confidence, and self-discipline are the cornerstones of the JROTC program. Many students who haven’t been challenged in their lives are challenged physically, mentally, and morally through the demands of student leadership positions where they develop a sense of “Authority, Responsibility, and Accountability.”


Mark Coates is a retired Marine Master Sergeant who served over 26 years on active duty. Originally from Redondo Beach, California, he is currently the MCJROTC marine instructor at Tolleson Union High School. Master Sergeant Coates served in numerous billets during his tenure in the Marine Corps as a combat engineer to include drill instructor, senior drill instructor, formal school instructor course chief, engineer operations chief, operations chief (Operation Iraqi Freedom and Enduring Freedom) and has been serving as a MCJROTC instructor since August 2007. Master Sergeant Coates possesses an associate degree in history and a bachelor’s degree in homeland security and emergency management.

M. A. Coates, Master Sergeant, USMC (Ret)
Senior Marine Instructor

Antonio Carrion

Tyrone Hall