Mainframe System Programmer/ Sr. Infra Engineer with Mainframe Network
Roseland, NJ
Position Overview:
We are seeking an experienced Mainframe System Programmer responsible for the installation, configuration, maintenance, and tuning of IBM z/OS systems and associated system-level components. This role is not application development-it is focused on the core operating system, supporting the infrastructure that runs critical business workloads. The ideal candidate is hands-on with IBM mainframe architecture, system utilities, and hardware configuration, and is comfortable working in high-availability production environments.
Key Responsibilities:
- Install, configure, and maintain z/OS, z/VM, and system software components such as JES2, RACF, VTAM, and TCP/IP.
- Perform system-level maintenance, apply PTFs/APARs via SMP/E, and handle system upgrades and IPLs.
- Configure and support system automation tools, console automation, and workload schedulers (e.g., IBM TWS, CA-7).
- Administer and troubleshoot mainframe storage systems, catalogs, DFSMS, and tape management tools.
- Conduct system performance monitoring and tuning using tools like RMF, SMF, OMEGAMON, MainView, etc.
- Manage mainframe security infrastructure (primarily RACF), implement policies, and assist with audits/compliance.
- Provide technical support for mainframe hardware and software-related incidents; work with IBM and vendors for resolution.
- Participate in disaster recovery planning and testing.
- Document systems configurations and changes in accordance with ITIL/Change Management processes.
- Support cross-functional teams including DBAs, network engineers, and operations to ensure a stable and secure mainframe environment.
Required Skills and Experience:
- 5+ years of experience as a Mainframe System Programmer (z/OS).
- Strong hands-on expertise with z/OS system internals, SMP/E, JCL, and ISPF.
- Deep understanding of IBM mainframe hardware configuration (HCD/HCM), LPAR, IOCP/HCD, and PARMLIB.
- Experience with mainframe automation, monitoring, and scheduling tools.
- Proficient with RACF administration and overall mainframe security concepts.
- Skilled in REXX, CLISTs, and scripting for system automation.
- Familiarity with change management, problem management, and system documentation.
Preferred Qualifications:
- IBM Certified System Programmer - z/OS or similar certifications.
- Experience with z/OSMF, z/OS Connect, or z/Linux environments.
- Working knowledge of modern integration practices between mainframe and distributed/cloud platforms.
- Experience with capacity planning and chargeback tools.