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.
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
- Students
- Parents
- Faculty
- Alumni
- Grandparents
- Videos
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.

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About: Guidance Counselor

NCAA Coordinator/NCAA High School Advisory Group Member

Returned Peace Corps Volunteer - Nyangana, Namibia (Africa)

Education: Master's, Bachelor's Degree, PPS Credential

Master of Arts in Educational Counseling - Pupil Personnel Services Credential - Azusa Pacific University; Bachelor of Science in Business Administration - University of Nebraska - Lincoln

At MD since: 1997

Name: Ms. Mary McElroy
Position: School Counselor (9th: A-L)
Email: Send email
Phone: (714) 850-9568