Our Faculty & Staff
Curiosity is in the air.
Through small classes guided by expert teachers, our faculty support every student to be the best versions of themselves. Our classrooms are places where good questions are more treasured than good answers, and the authentic learning our students experience is both inspiring and transformative.
Click an individual's name for more information.
Mrs. Denise Sours
Middle School Art
B.A., Northern Arizona University, Art Education
M.Ed., Northern Arizona University, Bilingual and Multicultural Education
M.Ed., Arizona State University, Educational Leadership
M.Ed., Northern Arizona University, Bilingual and Multicultural Education
M.Ed., Arizona State University, Educational Leadership
Mrs. Sours joined PCDS in 2017.
Ms. Brittany Stanchik
Director of Speech and Debate
B.A., Communications, Arizona State University
B.A., Justice Studies, Arizona State University
B.A., Justice Studies, Arizona State University
Ms. Stanchik joined PCDS in 2022.
Ms. Claire Stephens
Lower School Teacher
B.A., Northern Arizona University, Sociology
M.A., Northern Arizona University, Elementary Education
M.A., Northern Arizona University, Elementary Education
Ms. Stephens joined PCDS in 2012.
Ms. Shannon Stringer
Middle School English
B.A., Gonzaga University, English
M.A., Boston University, Teaching with a concentration in English
M.A., Boston University, Teaching with a concentration in English
Ms. Stringer joined PCDS in 2020.
Mr. Ben Sullivan
Head of Middle School
B.A., Arizona State University, Psychology
M.A. and Ed.S., Lehigh University, School Psychology
Principal's Certificate, University of Pennsylvania, School Leadership
M.A. and Ed.S., Lehigh University, School Psychology
Principal's Certificate, University of Pennsylvania, School Leadership
Mr. Sullivan joined PCDS in 2014.
Mr. Camilo Tafur
Upper School Science, Chair, Science Department
B.S., Northern Arizona University
Mr. Tafur joined PCDS in 2018.
Ms. Kaitlin Thursby, BSN, RN, NCSN
School Nurse
B.A., Arizona State University, Educational Studies
B.S., Grand Canyon University, Nursing
B.S., Grand Canyon University, Nursing
Ms. Thursby joined PCDS in 2022.
Ms. Teeraya Tomlin
Lower School Art
B.A., Silapakorn University, Archaeology
M.A., Bangkok University, Communications
M.A.I.A., Ohio University, International Studies
M.A., Ohio University, Telecommunications
M.A., Bangkok University, Communications
M.A.I.A., Ohio University, International Studies
M.A., Ohio University, Telecommunications
Ms. Tomlin joined PCDS in 2004.
Mr. Mark Trescott
Middle School Mathematics
B.A., Crown College, Intercultural Studies
M.Ed., University of Minnesota
M.Ed., University of Minnesota
Mr. Trescott joined PCDS in 2024.
Mrs. Michele Trescott
Lower School Teacher
B.S., Crown College, Elementary Education
Mrs. Trescott joined PCDS in 2024.
Ms. Camelia Tumminello
Upper School Spanish
B.A., Yale University, French Literature
M.S., Yale University, French Literature
M.S., Yale University, French Literature
Ms. Tumminello joined PCDS in 2020.
Ms. Esmi Viccina
Middle School Spanish
B.A., Universidad Femenina Del Sagrado Corazón, Foreign Language and Translation
M.A., Pontifica Universidad Catolica del Peru, Teaching English as a Foreign Language
M.A., Pontifica Universidad Catolica del Peru, Teaching English as a Foreign Language
Ms. Viccina joined PCDS in 2023.
Mr. Carlos Vicuña
Middle School Science
B.A., Cal State Northridge, Child and Adolescent Development and Early Childhood Education
Mr. Vicuña joined PCDS in 2023.
Mrs. Sarah Vicuña
Lower School Librarian
B.A., Western Washington University
M.I.L.S., San Jose State University
M.I.L.S., San Jose State University
Mrs. Vicuña joined PCDS in 2019.
Ms. Amy Walker
Middle School Mathematics
B.A., Ottawa University, Mathematics/Education
Ms. Walker joined PCDS in 2021.
Mr. Jim Waller
Middle School Mathematics
B.Ed., Arizona State University, Secondary Education, History
M.Ed., Arizona State University, Higher and Postsecondary Education
M.Ed., Arizona State University, Higher and Postsecondary Education
Mr. Waller joined PCDS in 2013.
Ms. Kim Wass
Lower School Learning Specialist
B.S., Iowa State University, Elementary Education
Ms. Wass joined PCDS in 2016.
Ms. Maddie Williams
Admissions Associate
B.S., Arizona State University, Educational Studies
M.Ed., Northern Arizona University, Early Childhood Education
M.Ed., Northern Arizona University, Early Childhood Education
Ms. Williams joined PCDS in 2016.
