Lead Mainframe Infrastructure Engineer

United States Digital Space LLC; Chandler (TX); On-site; USD 108,000 - 165,000; Full time

Benefits offered by this job

Benefits eligible

Annual discretionary plan

Job summary

United States Digital Space LLC seeks an experienced z/OS infrastructure engineer to design, deploy, and support mainframe services in a large, distributed environment. You will ensure system stability, implement automation, and mentor teams while aligning with enterprise standards.

You will manage z/OS, JES2, RACF, z/OSMF, SMP/E activities, and collaborate with networks, storage, and security to deliver reliable mainframe solutions.

Qualifications

• Demonstrated working knowledge of the IBM z/OS operating system, including system control and RACF security.
• Hands-on experience supporting IBM z/OS system and subsystem software in large-scale, globally deployed environments.
• Proven ability to develop and enhance tools, standards, and methodologies used to manage enterprise z/OS environments.
• Advanced problem-determination skills, including issue analysis, root-cause identification, and timely resolution.
• Extensive knowledge of IBM zEnterprise server hardware and supporting data center facilities.
• Experience installing and servicing z/OS software using z/OSMF and SMP/E.
• Experience working with IBM electronic support resources, including IBMLINK.
• Subject-matter expertise in mainframe systems programming, with the ability to provide technical leadership and guidance.
• Experience supporting z/OS 3.1 environments running JES2.
• Proficiency with diagnostic and performance tools, including IPCS, RMF, MICS, SMF, Debug Tool, SLIP, and Splunk.
• Programming experience with REXX and IBM High Level Assembler.
• Hands-on RACF administration and security support experience.
• Experience defining and maintaining mainframe hardware configurations using HCD.

Responsibilities

• Engineers and operate network solutions supporting mainframe TCP/IP and SNA/APPN-based system integrations.
• Optimizes high-availability connectivity for business-critical, high-velocity transactions and batch-processing systems.
• Leads modernization of mainframe network architectures, including improvements in observability and telemetry.
• Advances automation and AI-assisted operations to reduce manual effort, improve consistency, and enhance network reliability.
• Diagnoses and resolves complex issues across routing, switching, firewalls, load balancers, and mainframe network stacks.
• Continuously improves network solutions to meet performance, capacity, resiliency, and cybersecurity compliance standards.
• Confirms that application and business requirements have been translated into technical definitions, reference models, blueprints, and playbooks to guide development and integration of technology solutions.
• Contributes to the creation/selection of functional and non-functional product evaluation requirements within and across domains.
• Reviews and may develop software solutions to address manual and repeatable work or inefficient processes.
• Reviews and guides the evaluation of reference models, blueprints, playbooks and the execution of on-site evaluations of third-party products being considered for firm adoption.
• Mentors and assists Infrastructure resources on infrastructure service along with application integration validation methods and tools to ensure that technology solutions comply with enterprise system design and engineering standards.
• Promotes an inclusive and healthy working environment and help to resolve organizational impediments/blockers.

Skills

z/OS knowledge

RACF security

z/OSMF

SMP/E

JES2

Splunk

IPCS

RMF

HLASM/REXX

Mainframe observability

Z Enterprise hardware

Tools

z/OSMF

SMP/E

JES2

Splunk

IPCS

RMF

Job description

United States Digital Space LLC seeks an experienced z/OS infrastructure engineer to design, deploy, and support mainframe services in a large, distributed environment. You will ensure system stability, implement automation, and mentor teams while aligning with enterprise standards.

You will manage z/OS, JES2, RACF, z/OSMF, SMP/E activities, and collaborate with networks, storage, and security to deliver reliable mainframe solutions.