Human Resources & Payroll Department Directory

  • If you are a University employee, please contact your respective representative at in new window .
  • For payroll and timeclock matters, please contact Ariana Helguera.
  • For recruiting, posting, onboarding and offboarding matters, please contact Kim Avila.
  • For data entry/benefits, including retirees benefits, please contact Stephen Weissbart.
  • For HRIS, employee issues and urgent matters, please contact Bertha Leon or Rosario Borromeo.

Rosario F. Borromeo

HR/Payroll Director

Phone: 657.278.4116
Fax: 657.278.5491

Bertha Leon

HR Manager

Phone: 657.278.4120
Fax: 657.278.5491

Ariana Helguera

Payroll Supervisor

Phone: 657.278.4114
Fax: 657.278.5491

Stephen Weissbart

HR Data Entry/Benefits

sweissbart@fullerton.eduOpens in new window

Phone: 657.278.8091
Fax: 657.278.5491

Kim Avila

HR Representative (Recruiting)

Phone: 657.278.4119
Fax: 657.278.5491

Collin Marcinkevicz

HR Receptionist (PT)


Phone: 657.278.4119
Fax: 657.278.5491



The CSUF Auxiliary Services Corporation (ASC) is a non-profit public corporation that was incorporated in 1959 for the purpose of promoting and assisting the educational mission of Cal State Fullerton.