Mater Dei High School

About MD
Mater Dei is a distinguished destination of excellence in academics and technology, the arts, faith and service, campus life, and athletics. We are proud to be Orange County’s oldest and largest Catholic high school.
Admissions
Your journey to becoming a Monarch starts here! Tour campus, schedule a shadow day, begin your application, and more. We are excited for you to join the MD family!
Programs
Built on Catholic fellowship and intellectual rigor, our programs in academics, technology, athletics, faith and service, and the arts provide unlimited opportunities for student success. Comprehensive counseling and wellness resources educate and bolster families throughout the high school journey.
Faith in Action
Guided by the articulation of Catholic Social Teachings, Mater Dei prioritizes the faith development of our students with an emphasis on Christian service. We believe this allows our students to grow in their spiritual lives while living our gospel values through giving back to others and truly experiencing the face of God.
Campus Life
Through avenues of leadership, faith, shared interests, and extracurricular activities and events, students can make Mater Dei their own. Get involved today!
Community
Tradition never graduates. Alumni, lifetime parents, grandparents, and friends are a vital and vibrant aspect of our community. Once a Monarch, always a Monarch.
Giving
Behind every achievement, success, and championship, stand the alumni, parents, faculty, staff, and friends who fortify our future. We invite you to support MD in a variety of ways with a gift that is meaningful to you.
- Students
- Parents
- Faculty

Biography

About
Joel has over 32 years of experience in Catholic school educational based athletics. During his tenure in athletics, Joel has worked as the Head Athletic Trainer, Associate Athletic Director, Coordinator for the Trinity League and the Secretary for the Orange County Area Placement of High Schools for the Southern Section of the California Interscholastic Federation. Joel and his lovely wife Trish, live in Tustin Ranch.

What I Love About MD
Mater Dei is a wonderful community full of people wanting to serve others by teaching. Whether they are in the classroom, on the competitive field, in extracurricular activities or overseeing those who do. Mater Dei has a rich tradition of excellence in everything that is done, while maintaining spirituality, love and compassion. Our core values, Honor, Glory and Love.

Education: Bachelor of Arts, Movement and Exercise Science - Chapman University

At MD Since: 2022

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Name: Mr. Joel Hartmann
Position: Executive Director of Athletics
Email: Send email
Phone: (714) 754-0750