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About

Leadership

List of 1 members.

  • Photo of Matthew D. Powell

    Matthew D. Powell 

    President
    707.255.0950 ext. 641

List of 1 members.

  • Photo of Joe Welling

    Joe Welling 

    Principal
    707.255.0950 ext. 768

List of 1 members.

  • Photo of Andrea Flores

    Andrea Flores 

    Vice President for Advancement
    707.255.0950 ext. 610

List of 1 members.

  • Photo of Britt Sullivan

    Britt Sullivan 

    Director of Human Resources
    707.255.0950 ext. 766

List of 1 members.

  • Photo of Alma Gallegos

    Alma Gallegos 

    Assistant Principal; Director of LEAP
    707.255.0950 ext. 526

List of 1 members.

  • Photo of Nickolas Roberts

    Nickolas Roberts 

    Vice President for Finance
    707.255.0950 ext. 779

List of 1 members.

  • Photo of Alicia Valdivia

    Alicia Valdivia 

    Vice President for Enrollment Management; Instructor of Social Studies
    707.255.0950 ext. 621

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.