Excellent opportunity for z/OS System programmer to be part of our Cloud Infrastructure & Security services practice. Cognizant Infrastructure Services – Provides IT infrastructure & Cloud services for clients across industry verticals, including both Consulting/Professional and Managed Services, across Enterprise Computing, Cloud services, Security Services, DevOps, Data Centres, End User Computing, Service Desk, Network Services and Environment Management Services. Key Responsibilities : Upgrading, maintaining and supporting the z/OS operating system Upgrading, maintaining and supporting ISV products particularly from the vendors; IBM and Computer Associates (CA) Production support Mainframe systems programming. Must have knowledge of a combination z/OS, SMP/E, TSO/ISPF, USS, SDSF, JCL. IBM and CA Product knowledge and be able to work independently. Key Skills and Experience : Experience in upgrading, maintaining and supporting the z/OS operating system Experience in upgrading, maintaining and supporting ISV products particularly from the vendors; IBM and Computer Associates (CA) Experience in Production support Must have extensive experience of mainframe systems programming. Must have knowledge of a combination z/OS, SMP/E, TSO/ISPF, USS, SDSF, JCL. Must have knowledge of IBM and CA Products and be able to work independently.