Schools Helping Schools
Building relationships to deliver innovative coverage
and services
Executive Staff
Dr. Dave Ostash
Chief Executive Officer
Kristy Comstock
Administrative Secretary II
661-636-4682
krcomstock@siscschools.org
Kim Sloan
Chief Financial Officer
Maggee Valencia
Administrative Secretary I
661-636-4412
mvalencia@siscschools.org
Gabriel Rodriguez
Executive Director
SISC I – Workers’ Compensation
Briana Torrez
Secretary
661-636-4256
jaborrero@siscschools.org
Robert Kretzmer
Executive Director
SISC II – Property and Liability
Lilia Morentin
Administrative Secretary I
661-636-4495
limorentin@siscschools.org
John Stenerson
Deputy Executive Officer
SISC III – Health Benefits
Lisa Macias
Administrative Secretary I
661-636-4829
limacias@siscschools.org
Roy Marchetti
Chief Information Systems Officer
SISC
Tina Tafoya
Secretary II
661-636-4424
titafoya@siscschools.org
Nicole Mata
Executive Director
SISC III – Health Benefits
Lisa Macias
Administrative Secretary I
661-636-4829
limacias@siscschools.org