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...

Sue Smith

Office Manager

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

Gina Giorsetto

Administrative Assistant

Ms. Gina joined Keystone 2021. She holds an Associate’s Degree in Early Chil...

Bethany Brown

Special Education Director & Testing Coordinator

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

Melissa Sutton

Development Director

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

Kristin Morgan

Business Manager: Aspire Business Consultants

Kiara Alegre Gonzalez

Support Staff

Ms. Kiara joined Keystone in 2021. She was born in Sonora Mexico, and moved to Arizona ...

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...

Consuelo Arellano

Children's House Bilingual Assistant- Saguaros

Anny Aziz

Children's House Bilingual Assistant - Palos 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. He has a bachelor's degree in...

Janelle Bredenkamp

Elementary Assistant - Red Tailed Hawks & Elementary Extended Care Coordinator

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

Anasazi Brewton

Toddler Guide - Agaves

Ms. Anasazi joined Keystone in 2021.  She has been working in education and m...

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...

Lianna Contreras

Children's House Assistant- Palos Verdes

Mar Cubillo

Children's House Bilingual Assistant- Prickly Pears

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 joined Keystone in 2019. She has more than 35 years of experience working w...

Gerry DeLaTorre

Music Specialist

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

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...

Allison Kirby

Special Education Teacher

Mrs. Allison Kirby joined Keystone Montessori in 2021. She has a Bachelor's De...

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...

Daniela Lopez

Children's House Assistant- Prickly Pears

Ms. Daniela joined Keystone in 2021. She is originally from Mexico City, Mexico and has...

Nicole Mansker

Elementary Assistant- Gila Monsters

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...

Matt Okunevich

Elementary Assistant- Diamondbacks

Mr. Matt joined Keystone Montessori in 2021. He has been involved with the school ...

Alejandra Padilla

Support Staff

Katty Padilla

Elementary Guide - Iguanas

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

Ben Peterson

Support Staff

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

Paola Rodriguez

Children's House Assistant - Saguaros

Ms. Paola joined Keystone in 2021. She attended College of Lake County in Illinois, the...

Liz Schiavone

Elementary Assistant - Scorpions

Ms. Liz joined Keystone in 2021. She holds a bachelor’s degree in Rehabilitation ...

Mia Soard

Support Staff

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...

Nate Tunstall

Support Staff

Imelda Urbiztondo

Children’s House Guide - Palos Verdes

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

Abby van Vianen

Adolescent Guide- AZ Eagles

Ms. Abby joined Keystone in 2021. She earned her bachelor's degree in Elementary Ed...

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

Elementary & Adolescent Art Guide & Yoga Instructor

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