Principal Database Administrator, DBA – Mainframe Dbz​/OS

Responsibilities

• Support and maintain large‑scale Db2 databases on z/OS for business‑critical trading and brokerage applications
• Design, configure, and maintain low‑latency data replication using IBM IIDR (Q Rep / CDC) in Active‑Active and Active‑Passive architectures
• Perform proactive performance analysis and tuning to ensure optimal response times and system stability
• Lead troubleshooting and rapid resolution of complex, time‑sensitive production issues with a strong sense of ownership and attention to detail
• Participate in an on‑call rotation to provide 24x7 production support for critical database platforms
• Collaborate with application teams, infrastructure partners, and vendors to deliver resilient, scalable database solutions

• Extensive hands‑on experience managing large, complex mainframe Db2 z/OS database environments
• Deep expertise with IBM IIDR replication technologies (Q Rep / CDC), including setup, monitoring, tuning, and troubleshooting
• Strong skills in Db2 utilities, SQL, JCL, and working knowledge of COBOL application interactions
• Proven experience supporting mission‑critical production systems with strict SLAs
• Excellent communication skills and ability to work effectively across applications, infrastructure, and vendor teams