HIGH SCHOOL ADMINISTRATION AND OFFICE PERSONNEL 

Frank Steidl (Principal)

• franksteidl@calvinchristianescondido.org
• (760) 489-6430
• B.A. in History from Whitworth College

Julie Boone (Office Secretary)

• julieboone@calvinchristianescondido.org
• (760) 489-6430

Bianca Tiersma (Office Secretary)

• biancatiersma@calvinchristianescondido.org
• (760) 489-6430

 HIGH SCHOOL FACULTY

Dave Bakker (Mathematics)

• davidbakker@calvinchristianescondido.org
• (760) 489-6430
• B.A. in Mathematics from Dordt College

Deborah Boonstra (Mathematics)

• deborahboonstra@calvinchristianescondido.org
• (760) 489-6430
• B.A. in Mathematics Education from Calvin College
• M.A. in Mathematics Education from Calvin College

Janet Brouwer (Student Improvement Program)

• janetbrouwer@calvinchristianescondido.org
• (760) 520-8413
• B.A. in History from University of California San Diego
• California Teaching Credential from California State University Fullerton
• M.A. in Education with an emphasis in Literacy Development from California State University Fullerton

Brian Duyst (Counselor)

• brianduyst@calvinchristianescondido.org
• (760) 489-6430
• B.A. in Psychology from Calvin College
• B.A. in Communications from Calvin College
• M.A. in Counseling Psychology and Counselor Education with an emphasis in School Counseling from University of Colorado at Denver

Julia Garvelink (U.S. History, A.P. U.S. History)

• juliagarvelink@calvinchristianescondido.org
• (760) 489-6430
• B.A. in History and Social Studies from Calvin College

Rhonda Hartgerink (English)

• rhondahartgerink@calvinchristianescondido.org
• (760) 489-6430
• B.A. in English from Calvin College

Tanya Hunsinger (Librarian)

• tanyahunsinger@calvinchristianescondido.org
• (760) 489-6430
• AA Degree & Certificate in Library Technology from Palomar College

Dirk Jasperse (Science)

• dirkjasperse@calvinchristianescondido.org
• (760) 489-6430
• B.A. in Biology from Calvin College
• M.A. in Teaching from Calvin College
• website

Eric Miedema (Boys Physical Education)

• ericmiedema@calvinchristianescondido.org
• (760) 489-6430
• B.A. in Physical Education from Dordt College

Cathy Silva (Spanish, Yearbook)

• catherinesilva@calvinchristianescondido.org
• (760) 489-6430
• B.A. in Elementary Education from Dordt College
• Postgraduate at Universidad de las America & Universidad Iberamericana

Mark Steenstra (Technology Director, Computers)

• marksteenstra@calvinchristianescondido.org
• (760) 489-6430
• B.S. in Letters & Engineering from Calvin College
• B.S. in Electrical Engineering from University of Michigan
• California Clear Credential in Science & Physics from California State University San Marcos
• website

Bill Stout (Athletic Director, Boys Physical Education, Sr. English)

• billstout@calvinchristianescondido.org
• (760) 489-6430
• B.A. in English & Psychology from Calvin College
• M.A. in School Administration from U.S. International University

Glenda Vander Kam (Art, International Students)

• glendavanderkam@calvinchristianescondido.org
• (760) 489-6430
• B.A. in Education from Calvin College

Vicki Van Essen (Band, Choir, Girls Physical Education, Photography)

• vickivanessen@calvinchristianescondido.org
• (760) 489-4337
• B.A. in Music Education from Dordt College

Doug Van Solkema (Bible, Physical Education, Health)

• dougvansolkema@calvinchristianescondido.org
• (760 ) 489-6430
• B.A. in Education from Calvin College
• M.A. in Education from Calvin College

Steve Whitener (History, Media, Speech, Sociology)

• stevewhitener@calvinchristianescondido.org
• (760) 489-6430
• B.A. in Applied Arts & Sciences Public Administration from San Diego State University
• M.A. in Business Administration from National University