Administration

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Administration Team

Andrea Banks

Director of Enrollment Management

Andrea Banks

Director of Enrollment Management

Education: BA in Sociology from University of Southern California

What did you do before you came to Keystone: I’ve been in admissions for 14 years but all in California. Before I relocated to San Antonio in July I was the Director of Admissions at a progressive Mandarin immersion school in San Francisco.

Why do you like working here: The minute I set foot onto Keystone’s campus it just felt like home. The warmth that is exuded on a daily basis only makes my job that much easier when talking to prospective families.

Hobbies/pastimes: Dance, dance, dance. When I lived in CA, along with doing admissions, I was also a part-time dance instructor. I taught a dance cardio class at an all female (and female owned) studio in Oakland.

Something (personal or professional) you’re proud of: I’ve never lived anywhere except CA. The biggest move I ever made in my life was from Southern California to Northern California (ha ha). The fact that I’m living in a part of the country I never imagined is quite astonishing. The fact that I really like it and am thriving is even more astonishing!!!!

Favorite/inspirational book: I’m the type of person who doesn’t have a favorite because there are just too many good things and experiences out there. However, one book that has stuck with me and I think about quite often is “A Little Life” by Hanya Yanagihara.

Favorite quote: ”Every woman is a rebel, and usually in wild revolt against herself.” – Oscar Wilde

Tim Carpenter

Director of Maintenance

Tim Carpenter

Director of Maintenance

25+ years of experience providing support, planning, and execution of physical maintenance, operations of buildings, and building systems in an educational setting. Joined Keystone in 2018..

Phone:210-735-4022x301

Sara Christiansen

Director of College Counseling

Sara Christiansen

Director of College Counseling

Kenyon College, B.A.; University of Michigan, M.Ed.; joined Keystone in 2016.

Michael Flynn

Chief Financial/Operations Officer

Michael Flynn

Chief Financial/Operations Officer

The George Washington University, MBA; University of Delaware BS Economics

20+ years experience in finance. Joined Keystone in 2018.

Phone:210-735-4022x301

Monica Gutierrez, RN

School Nurse

Dottie Hall

Interim Head of Upper School

Dottie Hall

Interim Head of Upper School

University of Texas San Antonio, MA in Education Leadership, Texas A&M University, BS. More than 20 years of educational experience. Joined Keystone in 2020.

Billy Handmaker

Head of School

Billy Handmaker

Head of School

Washington University-St. Louis, MAT. Education/History

The George Washington University, B.A. Political Science

More than 30 years experience as an educator, 25+ years as head of school. Joined Keystone in 2018.

Phone:210-735-4022
Email:bhandmaker@keystoneschool.org

Mallory Matthews

Head of Lower/Middle School

Mallory Matthews

Head of Lower/Middle School

Ed.M Human Development and Psychology, Harvard University, BA Integrated History Education, Wittenberg University. Joined Keystone in 2021.

D'Andre Montgomery

Athletic Director

D'Andre Montgomery

Athletic Director

Canisius College, MA of Sports Administration; Louisiana State University, BA; 10+ years teaching and administrative experience; joined Keystone in 2022. U.S. Olympic track team, 1996.

Phone:210-735-4022x365

Todd Moore

Director of Technology Services & Data Security

Todd Moore

Director of Technology Services & Data Security

University of Texas at San Antonio, B.B.A.; GISP; 27 years of experience in Information Technology Leadership, Data Security, and Business fields; joined Keystone in 2004.

Penny Moyer, LVN

Registrar/School Nurse

Penny Moyer, LVN

Registrar/School Nurse

Texas LVN Nursing License; extensive experience in nursing and office management; Texas Department of Health Certification in Hearing, Vision and Scoliosis Screening; American Heart Certification for Basic Life Support (CPR/AED); joined Keystone in 1987.

Phone:210-735-4022x301

Emma Fox

Little/Lower School Counselor

Emma Fox

Little/Lower School Counselor

Bridgewater State University, M.Ed. and B.A in School Counseling; 5+ years in counseling; joined Keystone in 2024

Phone:210-735-4022x354

Angie Shotzberger

Assistant Head of Lower/Middle School, Head of Summer Programs

Angie Shotzberger

Assistant Head of Lower/Middle School, Head of Summer Programs

Texas Christian University, Masters in Education, BS in Health and Fitness Kinesiology; 10+ years experience in education; joined Keystone in 2023.

Phone:210-735-4022x350

Edmund Tijerina

Director of Marketing & Communications

Edmund Tijerina

Director of Marketing & Communications

Education: Harvard, A.B. in Philosophy; Columbia University, M.S. in Journalism

What did you do before you came to Keystone: Food editor, restaurant critic, and food writer at the San Antonio Express-News; led a content marketing department; freelance writer

Why do you like working here: I love the chance to use my skills to make a difference for this school and our community.

Hobbies/pastimes: Cooking, freelance writing for *San Antonio Magazine*

Something (personal or professional) you’re proud of: My son, Andrés

Favorite/inspirational book: *Man’s Search for Meaning* by Viktor Frankl

Favorite quote: “It takes a long time to become young.” – Pablo Picasso

Dena Hoenig Valdez

Head of Preschool

Dena Hoenig Valdez

Head of Preschool

210-369-9099

Position: Head of The Little School of Keystone

Education: Bachelor of Science in Family and Consumer Resources with a Minor in Psychology from University of Arizona; Masters of Education with specialization in Early Childhood from Southwest Texas State University, now referred to as Texas State University

What did you do before you came to Keystone: I taught, opened and directed a preschool program for 14 years before coming to Keystone in 2012

Why do you like working here: Keystone is such a special place! The students, parents and staff make my job so rewarding and fun!

Hobbies/pastimes: I enjoy exercising, waterskiing, scrapbooking, reading and watching movies.

Something (personal or professional) you’re proud of: I am proud of opening two incredible early childhood programs (Heintz Preschool of Congregation Agudas Achim – 2000) and (The Little School – 2012). I love being able to provide an excellent foundation and early start to learning. Children need to love school and I love being one of their first teachers.

Favorite/inspirational book: "Guess How Much I Love You," by Sam McBratney

Favorite quote: “Be Happy” – It’s the bumper sticker on my car.

Phone:210-369-9099
Email:dvaldez@keystoneschool.org

Adriana Villafranca

Director of Development and Alumni Relations

Adriana Villafranca

Director of Development and Alumni Relations

St. Mary’s University, B.A., M.P.A.; joined Keystone in 2016; 25+ years of experience in development and nonprofit management.

Phone:210-735-4022x353

Chanel Williams

Middle/Upper School Counselor

Chanel Williams

Middle/Upper School Counselor

Kean University, B.A. in Psychology, M.A. in Counseling; 14+ years in counseling; joined Keystone in 2024.

Phone:210-735-4022x323

Administration

Administration Team

Monica Gutierrez, RN

Brown Family Donates $3 million to Keystone School