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About

Meet our Faculty

Meet our Faculty & Staff

Justin-Siena is home to an extraordinary group of committed faculty and staff who care deeply about our students. Our teachers encourage and set high expectations not only for Justin-Siena students but also for each other. We recognize that mastery of our craft is a career-long process, one that Justin-Siena generously supports through professional development opportunities, a mentoring program for new faculty, tuition assistance for higher degrees, and other programs that support ongoing learning for our faculty. Learn why our faculty love their craft and their students below. 

Faculty & Staff Directory

  • Photo of Matthew Schmitz
    Matthew Schmitz '01
    Guidance
    Student Support Coordinator
    Since: 2011
    707.255.0950 ext. 561
    Sonoma State University - B.A; M.A.
  • Photo of Eileen Simmons
    Eileen Simmons
    Business Office
    Accounting Manager
    Since: 2014
    707.255.0950 ext. 608
    Heald Business College - A.A.
  • Photo of Jill Sinclair
    Jill Sinclair '99
    Guidance
    Director of Counseling
    Since: 2004
    707.255.0950 ext. 623
    University of California, San Diego - B.S.
    Sonoma State University - M.A.
  • Photo of Debbie Skillings
    Debbie Skillings
    Administrative Support
    Registrar
    Since: 1998
    707.255.0950 ext. 642
  • Photo of Br. Kevin Slate,
    Br. Kevin Slate, FSC
    Advancement
    Director of Donor Relations
    Since: 2015
    707.255.0950 ext. 707
    Saint Mary's College of California - B.A.
    Georgetown University - M.A.
  • Photo of Jennifer "Ms. Smetzer" Smetzer
    Jennifer "Ms. Smetzer" Smetzer
    Residential Life
    Amerigo Napa Valley ~ English Language Learning Coordinator
    Since: 2021
  • Photo of Mary Alice Spinelli
    Mary Alice Spinelli
    Religious Studies
    Instructor of Religious Studies; Department Chair
    Since: 2021
    707.255.0950 ext. 752
    California State University, Sacramento - B.A.
  • Photo of Kathryn Stafford
    Kathryn Stafford
    Mathematics
    Instructor of Mathematics
    Since: 2021
    707.255.0950 ext. 753
    University of California, San Diego - B.S.
    California State University, Channel Islands - M.S.
  • Photo of Melissa Stone
    Melissa Stone
    Visual and Performing Arts
    Instructor of Graphic Design
    Since: 2023
    707.255.0950 ext. 771
    California College of the Arts - BFA
    Art Center College of Design - MFA
  • Photo of Tyler Streblow
    Tyler Streblow '04
    Administrative Support
    Gasser Center Associate; Head Varsity Football Coach; Outside Facilities Coordinator
    Since: 2018
    707.255.0950 ext. 671

For more information, contact

List of 1 members.

  • Photo of Joe Welling

    Joe Welling 

    Principal
    707.255.0950 ext. 768

Justin-Siena High School

4026 Maher Street
Napa, CA, 94558
United States
T: 707.255.0950 
F: 707.255.0334
Justin-Siena is a Lasallian Catholic college preparatory community that serves young people in grades 9–12.