Senior Mainframe Site Reliability Engineer Application Support

• Support and ensure 24/7 reliability and availability of mainframe applications and systems
• Act as a senior point of contact for production support and major incidents
• Monitor system health, performance, and capacity
• Perform incident management, root cause analysis (RCA), and post-incident reviews
• Automate manual operational tasks to improve stability and recovery time
• Work with API/Web API integrations supporting mainframe applications
• Coordinate with development and infrastructure teams to improve system reliability
• Support disaster recovery (DR) planning, testing, and high availability
• Ensure compliance with security, audit, and regulatory requirements
• Drive continuous improvement and SRE best practices in mainframe operations

Required Qualifications

• 10+ years of experience in Mainframe Application Support / Operations
• Strong hands-on experience with IBM z/OS
• Experience with mainframe technologies:
  • CICS, IMS, DB2
  • JES2/JES3
  • MQ, SMF, SDSF
• Experience supporting APIs / Web APIs integrated with mainframe systems
• Strong background in production support and incident management
• Experience with performance tuning and capacity planning
• Automation/scripting experience: REXX, JCL, CLIST, Python, or similar
• Experience with monitoring and scheduling tools:
  • OMEGAMON, CA/BMC tools, Control-M

Preferred Qualifications

• Experience applying SRE practices in mainframe or hybrid environments
• Exposure to DevOps and automation frameworks
• Knowledge of Linux on Z or cloud integration
• Prior technical lead or team lead experience