Job Title: z/OS Systems Programmer Mode: Hybrid Location: London Type: contractorRole Overview:We are seeking an experienced z/OS Systems Programmer with a strong background in mainframe systems programming. The ideal candidate will have extensive expertise in upgrading, maintaining, and supporting the z/OS operating system and ISV products. This role requires hands-on experience in production support, problem resolution, and implementation of software changes in a mission-critical environment.Key Responsibilities:Upgrading, maintaining, and supporting the z/OS operating system.Managing ISV products, ensuring optimal performance.Providing production support and troubleshooting mainframe systems.Planning and executing software upgrades, patches, and configurations.Working independently on z/OS, SMPE, TSO/ISPF, USS, SDSF, and JCL.Participating in on-call rotation and providing after-hours support when required.Collaborating with cross-functional teams for software implementations and ensuring compliance with regulatory processes.Developing functional and technical design solutions to enhance system performance.Key Skills and Experience Required:Extensive experience in mainframe systems programming.Strong expertise in z/OS, SMPE, TSO/ISPF, USS, SDSF, JCL.In-depth knowledge of IBM and CA products.Excellent problem determination skills and ability to work independently.Strong communication skills with the ability to articulate complex information.Proven ability to build effective