Senior, Systems and Infrastructure Engineer

Position Summary

The Mainframe Storage Engineer is responsible for supporting and optimizing Walmart’s enterprise mainframe storage infrastructure across complex, high availability parallel sysplex environments. This role manages storage pools, virtual tape, disaster recovery processes, and IBM storage technologies that support mission critical workloads at large scale. The engineer works closely with mainframe systems, capacity planning, operations, and application teams to ensure resilience, performance, and operational excellence.

• Storage Operations & Engineering – Manage storage pools, including adding volumes, cleanup, and reclaiming unused volumes. Provide expert support for space allocation recommendations and usage optimization. Administer and maintain IBM DS8K storage systems. Support multiple large-scale parallel sysplex environments with data sharing. Perform system initialization, performance tuning, and subsystem optimization.
• Virtual Tape & Backup – Support virtual tape operations (experience with Luminex virtual tape systems preferred but not required). Work with DFHSM for hierarchical storage management. Utilize tools including FDR and MVSRM for backup, recovery, and storage resource management.
• Replication, Resiliency & High Availability – Support IBM GDPS environments, including Metro Mirror, Global Mirror, Metro-Global Mirror, and Hyperswap. Participate in Disaster Recovery planning, testing, and execution. Maintain DR readiness across mainframe storage assets.
• System Software & Utilities – Install, upgrade, and maintain IBM and third-party mainframe storage-related products. Perform SMPE installation and maintenance of program products. Use IBM utilities including DB2 and IMS utilities. Utilize JCL, TSO, and mainframe scripting (Rexx, CLIST).

• Deep knowledge of DFHSM, DFSMS, FDR, MVSRM, and related storage utilities.
• Experience managing mainframe storage pools and volume lifecycle operations.
• Strong understanding of mainframe storage concepts, catalogs, and alias structures.
• MVS System commands, catalog management.
• Strong skills with JCL, TSO, Rexx & CLIST scripting.
• Experience with SMPE for installation and maintenance.
• Experience with UNIX System Services (file systems, mounts).
• Experience with multi-site and multi-sysplex environments.
• Familiarity with IBM GDPS and replication technologies.
• IBM DS8K storage experience required.
• Experience with DB2/IMS utilities.
• Knowledge of system initialization, tuning, and performance optimization.
• Ability to participate in on-call rotation as needed.

Outlined below are the required minimum qualifications for this position. If none are listed, there are no minimum qualifications.

• Option 1:
  Bachelor’s degree in computer science, computer engineering, information systems, information technology, or related area and 3 years’ experience in technology infrastructure engineering across areas such as compute, storage, network, mobility or virtualization-related technologies.
• Option 2: 5 years’ experience in technology infrastructure engineering across areas such as compute, storage, network, mobility or virtualization-related technologies.

• Disaster Recovery methodologies and tooling (optional).
• Mainframe networking concepts (optional).
• Experience with storage management and data governance in enterprise environments (optional).
• Advanced tuning, automation, and tooling for storage workflows (optional).
• Product Experience (nice to have): BMC Tools (Main View/AMI OPS, SRM, Auto Ops), Compuware File Aid, Xpediter, ControlM or ICE, OPS/MVS;
  Rocket Software Mobius View/Infopac; JCLPlus;
  Mac Kinney Batch for CICS; RIO;
  Sterling Connect:
  
  Direct;
  Tectia SSH; UNIX System Services.

805 Se Moberly Ln., Bentonville, AR 72712, United States of America.

Walmart and its subsidiaries are committed to maintaining a drug-free workplace and has a no tolerance policy regarding the use of illegal drugs and alcohol on the job. This policy applies to all employees and aims to create a safe and productive work environment.