Sheridan, WY · Independent K–8 Day School · Est. 2003(307) 673-4218 · Schedule a Tour
Ridgemont Preparatory AcademyHome of the Ravens · Sheridan, Wyoming
Faculty & Staff · 2026–2027

The people who make Ridgemont, Ridgemont.

Our faculty bring decades of combined experience — and a shared belief that every child deserves to be known.

Administration

MH

Dr. Margaret A. Halloran

Head of School

Ed.D., University of Denver. Ninth year at Ridgemont; previously Head of the Lower School at Kent Denver.

JW

James P. Whitcombe

Assistant Head · Middle School

M.A., University of Wyoming. Twelve years at Ridgemont; teaches Grade 8 U.S. History.

LS

Linda K. Sorensen

Director of Admissions

B.A., Whitman College. Joined Ridgemont in 2015 after a decade in independent-school admissions.

Lower School Faculty

CR

Catherine E. Reilly

Kindergarten Lead Teacher

B.S. Elementary Education, Montana State University. Fifteenth year in the classroom.

DP

David M. Poulson

Grade 1 Lead Teacher

M.Ed., University of Nebraska. Certified Wilson Reading practitioner.

AB

Anne O. Beckwith

Grade 2 Lead Teacher

M.A.T., Middlebury College. Ridgemont faculty since 2007.

TC

Thomas R. Corliss

Grade 3 Lead Teacher

M.A. Curriculum & Instruction, University of Montana.

EM

Elizabeth R. Marston

Grade 4 Lead Teacher

B.A. English, Carleton College. Faculty since 2018.

JT

Julian A. Torres

Studio Art · Grades K–4

B.F.A., Kansas City Art Institute. Also directs the after-school ceramics club.

NB

Nora F. Bishop

Music & Movement · Grades K–4

M.M. Music Education, University of Wyoming. Orff-Schulwerk certified.

Middle School Faculty

VN

Vinh H. Nguyen

Classroom Teacher · Grade 5

Grade 5 homeroom teacher with instructional responsibility for English Language Arts, mathematics, and social studies. Coordinates the Academy’s educational-technology pilot, including classroom deployment of Anthropic’s Claude for Education across Grades 5–8 under faculty supervision. Joined Ridgemont in August 2024.

RH

Rebecca L. Hayes

English · Grades 6–8

M.A. English, University of Virginia. Author, Reading with Wonder (2020). Partners with Grade 5 on the Claude for Education pilot.

PK

Peter A. Kowalski

Mathematics · Grades 6–8

M.S. Applied Mathematics, University of Colorado. Coach, MATHCOUNTS.

SR

Dr. Samuel J. Ross

Science · Grades 6–8

Ph.D. Ecology, University of Wyoming. Director of the Outdoor Program.

MC

Marta A. Chen

Latin & Classical Studies

M.A. Classics, University of Chicago.

GK

Gregory S. Kittredge

Music & Choir Director

B.M. Choral Conducting, Lawrence Conservatory.

AD

Andrés E. Delgado

Spanish · Grades 5–8

M.A. Spanish Literature, University of Salamanca. Native of Bogotá, Colombia.

SE

Sarah J. Ellsworth

Physical Education · Grades K–8

B.S. Kinesiology, University of Montana. Also coaches Middle School volleyball.

HS

Helen M. Standish

Middle School Studio Art

M.F.A., Rocky Mountain College of Art + Design.

Staff

EO

Ellen G. O’Brien

Director of Operations

Business office, HR, and facilities.

DM

Daniel W. McKinnon

School Nurse

R.N., licensed in the State of Wyoming.

JA

Jane R. Aldridge

Librarian

M.L.I.S., University of Washington. Manages the Ridgemont Reading Room.