Full Job Description
Job Summary
We are seeking an experienced z/OS System Programmer / Mainframe Infrastructure Specialist to lead the design, installation, administration, and optimization of enterprise mainframe environments. The ideal candidate will possess strong expertise in z/OS system programming, System z architecture, Sysplex, LPAR management, mainframe networking (SNA, VTAM, TCP/IP), and infrastructure support. This role is responsible for maintaining high availability, performance tuning, capacity planning, security compliance, disaster recovery readiness, and complex system upgrades across development and production environments. The candidate will work closely with application, operations, and infrastructure teams to ensure system stability, resolve critical issues, and provide technical leadership for strategic mainframe initiatives, including modernization, datacenter migrations, and enterprise-wide infrastructure projects.
Mainframe Networking & Infrastructure:
• Manage and support Mainframe Networking Protocols: SNA, VTAM, TCP/IP
• Configure and maintain OSA (Open System Adapter) networking interfaces
• Strong understanding of Enterprise Network Infrastructure and Security
• Knowledge of routing protocols such as Open Shortest Path First (OSPF)
• Manage z/OS network communications, connectivity, and performance optimization
System Programming & Architecture Skills:
• Strong experience in z/OS System Programming and System z architecture
• Expertise in Sysplex configuration, LPAR management, and system integration
• Hands-on with SMP/E, IOCP, HCD, PARMLIB, and system configurations
• Install and maintain z/OS releases, RSU maintenance, and ISV products
• Knowledge of JCL, utilities, batch and online processing environments
Key Responsibilities:
• Lead installation, configuration, and upgrading of z/OS environments across development and production systems
• Design and manage z/OS architecture, Sysplex integration, and CFRM policies
• Handle hardware and software upgrade projects, including datacenter migration and exit planning
• Perform performance analysis, tuning, capacity planning, and workload management (WLM)
• Monitor system software access, performance, and resource utilization
• Manage and maintain z/OS, JES3 environments and ISV software
• Work closely with application teams to ensure production stability and issue resolution
• Define and enforce security, access control, and software usage policies
• Implement and validate backup, recovery, and disaster recovery (DR) procedures
• Ensure high availability, system reliability, and environment stability
• Support incident/problem determination and resolution within SLA timelines
• Provide technical leadership, mentoring, and guidance to teams
