San Marin Main Directory Numbers

San Marin Office Numbers

General Numbers For Contacting San Marin High School

Attendance Line: (415) 897-4901

Main Office Line: (415) 898-2121

Counseling Office Line: (415) 898-2123

Fax Line: (415)892-8284


Mark Sims
Mark SimsPrincipal

Mark brings a wealth of talent and experience with over 20 years in education, including previous jobs as the Instructional Director at Los Angeles Unified, Principal at Northview High School in Covina, and assistant principal positions at three high schools.  Mark was an English teacher at Glendora High School, and previously taught English, Math and Physical Education at a middle school, while also serving as the Associated Student Body Director.  Mark was selected as a teacher of the year and a principal of the year, and is very excited to work with the San Marin students, staff and parent

Mike Casper
Mike CasperAssistant Principal

Mike has served as an educational administrator for 13 years after working as a teacher in alternative education. Currently, he oversees special education, social science, athletics, school safety, emergency preparedness, discipline, standards-based instruction, standardized testing, and Restorative Justice. When not at work he enjoys spending time with his wife and two daughters, coaching softball, and coaching CYO basketball. He has a love for music particularly heavy metal and hard rock, is a fitness nut focused primarily on weightlifting and running, and a die hard fan of the Oakland A’s, the San Jose Sharks, and the Dallas Cowboys.

Mike earned a Bachelor of Science in Criminal Justice from Sacramento State and a Master of Arts in Education Administration from Sonoma State.