Senior Mainframe Administrator Db2 DBA (z/OS)

Job Title : Senior Mainframe Administrator Db2 DBA (z/OS)

Location: Hybrid

This role is open only to candidates who are authorized to work in the United States without the need for current or future sponsorship.

Opportunity

Administers, secures, and tunes the company's IBM Db2 for z/OS databases supporting core policy, claims, and financial processing. Owns physical database design review, performance management, backup and recovery, and disaster recovery readiness for the Db2 subsystems. Provides secondary administration for Microsoft SQL Server and Azure SQL Managed Instance and supports the data pipelines that move mainframe data to the enterprise data warehouse. Treats documentation, cross-training, and knowledge transfer as core deliverables of the role..

What You'll Be Doing

Database design and change management

• Reviews and approves physical database designs (tablespaces, partitioning, indexing, referential integrity, compression) for new and changed applications.
• Implements DDL and configuration changes through the ITIL change management process; maintains DDL, object inventory, and standards under version control.
• Manages subsystem parameters (ZPARM), buffer pool configuration, and storage allocation.

Performance management

• Monitors subsystem, thread, and application performance; establishes and tracks baselines.
• Analyzes access paths using EXPLAIN and related tooling; identifies and remediates inefficient SQL in partnership with application and data engineering teams.
• Schedules and tunes Db2 utilities (REORG, RUNSTATS, COPY, MODIFY, RECOVER) and maintains the utility calendar.

Backup, recovery, and availability

• Owns the image copy strategy, active and archive log management, and point-in-time recovery procedures.
• Executes and documents recovery tests on a defined cadence [HR/manager: state cadence, e.g., annually].
• Participates in disaster recovery exercises and maintains the Db2 recovery runbooks.

Security and confidentiality

• Administers Db2 authorization (GRANT/REVOKE, roles, RACF integration) under least-privilege principles.
• Supports internal and external audit and regulatory data requests.
• Handles confidential and regulated policyholder and financial data in accordance with company information security policies.

Integration and data movement

• Supports the nightly Db2-to-SQL Server extract pipelines (unload utilities, SFTP, enterprise scheduler) in partnership with EDM Data Engineering.
• Administers DDF/DRDA connectivity and distributed access for downstream consumers.
• Advises on Db2 data structures consumed by warehouse, finance, and analytics teams.
  
  Best Regards,
  Akhilesh Gupta
  Senior Recruiter
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