Ceridian Names Liza Sayre Senior Vice President of Implementation

May 10, 2007

(MINNEAPOLIS) - May 10, 2007 - Ceridian Corporation (NYSE: CEN) has named Liza Sayre senior vice president of HR/Payroll implementation.

Sayre was formerly with GE Commercial Finance Fleet Services where she held a variety of quality, team leadership and product management positions.

Sayre is a native of the Chicago, Ill. area and is a graduate of Indiana University.

About Ceridian
Ceridian is changing the world of work by enabling companies to be free to succeed in their core business through its suite of innovative managed human resource solutions that include payroll and compensation, staffing, compliance, HR administration and employee effectiveness. Our wide range of HR, payroll, work-life and benefits services are designed to help companies maximize the value of their people. Ceridian Corporation (NYSE: CEN) is an information services company serving businesses and employees in the United States, Canada and Europe. For more information about the human resource outsourcing company's comprehensive array of solutions, visit www.myceridian.com or call (800) 729-7655.