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GSA Federal Acquisition Service
For general questions, contact:
FAS National Customer Service Ctr
Phone: 1-800-488-3111
E-mail: ncsccustomer.service@gsa.gov
Private Shared Service Center for Core HR Services All offerors under this SIN must offer Personnel Action Processing and Benefits Management as a minimum. The offering of Payroll Services is optional. The technical requirements for this SIN are defined by the Office of Personnel Management's Business Reference Model for the HR Line of Business.