About

Leadership

School Leadership

Leadership Team

List of 1 members.

  • Photo of Matthew D. Powell

    Matthew D. Powell 

    Justin-Siena
    President
    707.255.0950 ext. 641
    University of Portland - B.A.
    2022

List of 2 members.

  • Photo of Robert Bailey

    Mr. Robert "Bob" Bailey 

    Justin Siena High School
    Vice President for Student Affairs
    707.255.0950 ext. 665
    Humboldt State University - B.S.
    2000
  • Photo of Robyn Harrison

    Robyn Harrison 

    Justin-Siena
    Vice President for Academic Affairs & Instructor of English
    707.255.0950 ext. 735
    California State University, Hayward - B.A.
    California State University, Sacramento - M.A.
    2020

List of 1 members.

  • Photo of Andrea Flores

    Ms. Andrea Flores 

    Justin Siena High School
    Vice President for Advancement
    707.255.0950 ext. 610
    University of Oregon - B.A.
    University of Washington - MPA
    2014

List of 2 members.

  • Photo of Alicia Valdivia

    Mrs. Alicia Valdivia 

    Justin Siena High School
    Vice President for Enrollment Management; Instructor of Social Studies
    707.255.0950 ext. 621
    Sonoma State University - B.A
    Chapman University - M.A.
    2005
  • John VanHofwegen 

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.