Provincial Secretariat Service (IAST: Prāntīya Sacivālaya Sevā), often abbreviated to as PSS, is the civil service under Group A and Group B state service of Government of Uttar Pradesh responsible for providing a permanent bureaucratic set up which assists in establishment and administration, policy formulation and monitoring and review of the implementation of policies/schemes of various departments.

The recruitment to the service is made on the basis of an annual competitive examination conducted by Uttar Pradesh Public Service Commission.

One-third of PSS quota is filled by promotion from Section Officers' cadre.

PSS officers, regardless of their mode of entry, are appointed by the Governor of Uttar Pradesh.

The typical functions performed by a PSS officer are: After completing their training, a PSS officer generally serves as under secretary in state secretariat in all departments.