About the Role
We’re looking for a Mainframe Infrastructure Consultant who understands the mainframe stack end to end—z/OS, core subsystems, performance, capacity, and operations. This role goes beyond day-to-day support. You’ll advise on platform stability, modernization readiness, cost optimization, and infrastructure strategy for large enterprise environments.
You’ll work closely with clients, architects, system programmers, and operations teams to keep mission-critical platforms running reliably while preparing them for what’s next.
Key Responsibilities
- Provide consulting and advisory support for IBM Mainframe (z/OS) infrastructure
- Assess current-state environments and recommend improvements in stability, performance, and capacity
- Lead or support z/OS upgrades, migrations, and infrastructure refresh initiatives
- Oversee system availability, resilience, and disaster recovery readiness
- Analyze performance, CPU usage, and capacity trends; recommend tuning and optimization
- Support and guide system programming teams across z/OS, JES, and core utilities
- Collaborate with security teams on RACF policies and compliance requirements
- Act as a technical escalation point for complex platform issues
- Create architecture documentation, standards, and best practices
Must-Have Skills & Experience
- 8+ years of experience in Mainframe infrastructure / platform roles
- Strong hands-on expertise with IBM z/OS
- Solid understanding of JES2/JES3, SMP/E, IPL processes, and system utilities
- Experience with performance monitoring, capacity planning, and tuning
- Exposure to disaster recovery, high availability, and resilience planning
- Ability to engage with senior stakeholders and explain technical topics clearly
Good-to-Have Skills
- Experience with RACF and mainframe security concepts
- Exposure to CICS, DB2, MQ from an infrastructure standpoint
- Knowledge of z/OS v2.x upgrades and modernization initiatives
- Automation or scripting (REXX, CLIST)
- Consulting experience in banking, insurance, or regulated industries