IBM Mainframe Systems Engineer

Role and Responsibilities

• Lead z/OS platform upgrade and modernization initiatives, including planning, testing, implementation, and stabilization activities.
• Provide engineering support across core IBM Z technologies, including z/OS, z/VM, DB2 for z/OS, CICS TS, IMS, and IBM MQ.
• Perform technical assessments, dependency analysis, and compatibility validation for system upgrades and infrastructure changes.
• Analyze and optimize system performance using SMF, RMF, and other monitoring tools to support tuning and capacity planning efforts.
• Design, configure, and maintain IBM MQ Queue Manager environments, including TLS enablement and secure communications.
• Support mainframe storage, recovery, virtualization, and networking environments, including SNA, VTAM, and TCP/IP technologies.
• Administer and maintain mainframe security controls utilizing RACF and ACF2, ensuring compliance and access governance requirements are met.
• Develop and maintain automation processes using JCL, REXX, CLIST, TSO/ISPF, and related utilities.
• Collaborate with infrastructure, application, security, and operations teams to support modernization and system reliability initiatives.
• Troubleshoot complex platform issues and provide root‑cause analysis for performance, availability, and integration challenges.

• 8+ years of experience supporting IBM Mainframe systems engineering and platform administration.
• Strong expertise in IBM Z technologies, including z/OS, z/VM, DB2 for z/OS, CICS TS, and IMS.
• 8+ years of experience with IBM MQ for z/OS, including Queue Manager architecture, administration, and TLS configuration.
• 8+ years of experience with mainframe security administration and engineering using RACF and ACF
  2.
• Experience performing system upgrades, migrations, performance tuning, and modernization initiatives within enterprise environments.
• Strong analytical, troubleshooting, and problem‑solving skills.
• Excellent communication and collaboration skills.

• Experience with performance monitoring and capacity planning using SMF and RMF.
• Proficiency with JCL, REXX, CLIST, TSO/ISPF, and automation scripting.
• Experience with enterprise scheduling tools such as CA-7 and Control‑M.
• Knowledge of mainframe networking technologies including SNA, VTAM, and TCP/IP.
• Familiarity with highly regulated, large‑scale enterprise environments.