Explore Keystone People

Laura Hertzler

Head of School

Ms. Laura joined Keystone in 2011. Ms. Laura is responsible for the vision, management ...

Stefan Linder

Associate Head of School

Mr. Stefan joined Keystone in 2002. He earned his Bachelor of Education from Feder...

Heather Bonacorda

Admissions & Marketing Director

Ms. Heather joined Keystone in 2019. She holds an American Montessori Society Early Chi...

Melissa Sutton

Development Director

Ms. Melissa joined Keystone in 2018. She is responsible for the Sustaining Fund and Tax...

Quintin Dailey

Facilities and IT Director

Mr. Quintin joined Keystone in 2016. He is a Keystone alumnus and currently attending M...

Sue Smith

Office Manager

Ms. Sue joined Keystone in 2004. Ms. Sue maintains students’ registration, attend...

Saundra Strobridge

Administrative Assistant

Ms. Saundra joined Keystone in 2019. She coordinates general parent/staff communic...

Bethany Brown

Special Education Co-Director & Testing Coordinator

Ms. Bethany joined Keystone in 2015. She holds a Bachelor of Arts in Elementary Educati...

Evie Benavidez

Special Education Co-Director

Ms. Evie joined Keystone in 2016. She holds a Bachelor of Arts in Elementary Education ...

Mia Alfonso

Spanish Guide

Ms. Mia has worked at Keystone since 2003 as the Elementary Spanish Guide. She holds a ...

Amie Allor

Elementary Guide - Red Tailed Hawks

Ms. Amie joined Keystone in 2003. She holds an American Montessori Society Elementary c...

Erika Andrus

Elementary Support Staff

Ms. Erika joined Keystone in 2020. She is currently working towards her Bachelors degre...

Carol Arnold

Adolescent Guide - AZ Eagles

Ms. Carol joined Keystone in 2012. She holds a Bachelor of Science Degree in Elementary...

Anny Aziz

Children's House Bilingual Assistant - Palo Verdes

Ms. Anny joined Keystone in 2019. She holds a bachelor's degree in Physical Th...

Francisco Bailón

Elementary Guide- Gila Monsters

Mr. Francisco joined Keystone in 2020, and he has a Bachelor's degree in ...

Savannah Bohannon

Ms. Savannah is a longtime Arizona resident, graduated from Mountain Pointe H...

Janelle Bredenkamp

Elementary Assistant - Red Tailed Hawks

Ms. Janelle joined Keystone in 2019. She has her Primary Montessori Certification throu...

Lidia Carrillo-Davila

Toddler Guide - Agaves

Ms. Lidia joined Keystone in 2016. She has an associate’s degree in primary educa...

Silvia Castellanos

Toddler Bilingual Assistant- Agaves

Ms. Silvia joined Keystone in 2020. She was born and raised in Long Beach, CA and recen...

Janelle Chamberlain

Elementary Assistant - Iguanas

Ms. Janelle joined Keystone in 2014. She worked as a paraprofessional & classroom a...

Caroline Clock

Special Education Support Staff

Ms. Caroline joined Keystone in 2020, after teaching Special Education for two years in...

Kaylee Cumpston

Support Staff

Ms. Kaylee joined Keystone in 2017. She is currently attending Rio Salado Com...

Kerry Cumpston

Reading Specialist & Special Education Support Staff

Ms. Kerry joined Keystone in 2005. She holds a Bachelor of Arts Degree in Elementary Ed...

Shahnaz Currim

Elementary Guide - Coyotes

Ms. Shahnaz joined Keystone in 2011. She holds Elementary and Primary Diplomas from Ame...

Leon Dantus

Adolescent Guide - AZ Eagles

Mr. Leon joined Keystone in 2004. He has his Montessori Orientation to Adolescent Studi...

Rosario Davila

Toddler Bilingual Assistant- Agaves

Ms. Rosario has more than 35 years of experience working with young children. She has r...

Gerry DeLaTorre

Music Specialist

Mr. Gerry joined Keystone in 2009. He holds a degree in Business Administration from th...

Marcela Erramuzpe

Children's House Bilingual Assistant- Saguaros

Ms. Marcela joined the Keystone team in 2020. She holds a Bachelor’s degree ...

Danielle Ghorayeb

Children's House Support Staff & Movement

Ms. Danielle has worked at Keystone since 2009. She holds a Bachelor of Science Degree ...

Erika Huerta

Elementary Assistant - Coyotes

Ms. Erika joined Keystone in 2019. She has a degree in education specialized in Spanish...

Maile Joseph-Griego

Children's House Assistant- Palo Verdes

Ms. Maile joined Keystone in 2020. She is currently attending ASU to receive ...

April Knight

Elementary Guide - Scorpions

Ms. April joined Keystone in 2011. She holds a Bachelor’s Degree in Fine Arts and...

Bahareh Kompani

Elementary Assistant - Great Horned Owls

Ms. Bahareh joined Keystone in 2015. She has an Associate's Degree in Computer...

America Lozoya

Children's House Bilingual Assistant- Prickly Pears

Ms. America  joined Keystone in 2020. She recently moved to Arizona from New ...

Jess Morales Ruan

Elementary Guide- Great Horned Owls

Mr. Jess joined Keystone in 2020. He holds a Bachelor of Business Administration Degree...

Sara Oaxaca

Elementary Guide - Diamondbacks

Ms. Sara joined Keystone in 2018. She holds a Masters of Education (Montessor...

Olivia Olson

Elementary Assistant - Gila Monsters

Ms. Olivia joined Keystone in 2020. She is originally from Park Ridge, Illinois and she...

Katty Padilla

Elementary Guide - Iguanas

Ms. Katty joined Keystone in 2017. She received her Montessori training from Instituto ...

Ben Peterson

Elementary Aftercare & Support Staff

Mr. Ben joined Keystone in 2016. He is a Keystone alumnus and currently attending Arizo...

Yanitsa Ramirez

Children's House Assistant- Saguaros

Ms. Yanitsa joined Keystone in 2020. She currently attends Mesa Community College to re...

Alex Simonet

Lower Elementary Art Guide & Elementary Aftercare

Ms. Alex joined Keystone in 2017. She has a Bachelor of Science in Arts. She enjoys exc...

Mia Soard

Children's House Assistant - Prickly Pears

Ms. Mia joined Keystone in 2016. She is a Keystone alumna and is currently attending Ch...

Jeremy Stepp

Special Education Support Staff

Mr. Jeremy joined Keystone in 2017. He has an Associate‘s degree in Education fro...

Whitney Stockhauser

Adolescent Guide - AZ Eagles

Ms. Whitney joined Keystone in 2018. She holds a Bachelor of Arts in Elementary Educati...

Imelda Urbiztondo

Children’s House Guide - Palo Verdes

Ms. Imelda joined Keystone in 2002. She holds a Bachelor degree in Elementary Educ...

Mariah Villa

Elementary Assistant - Scorpions

Ms. Mariah joined Keystone in 2020, and she was born and raised in Phoenix Arizo...

Blanca Villalobos

Children’s House Guide - Prickly Pears

Ms. Blanca joined Keystone in 2016. She holds a Bachelor of Arts in Elementary Educatio...

Yoo-Kyung Yoo

Children‘s House Guide - Saguaros

Ms. Yoo-Kyung joined Keystone in 1995. She holds a Bachelor of Arts from Yonsei Univers...

Ana Zikic

Upper Elementary & Adolescent Art Guide & Yoga Instructor

Ms. Ana joined Keystone in 2011. She holds a Bachelor of Arts Degree in Fine Art from C...