Senior Mainframe Systems Engineer

Experis; Chandler (AZ); Hybrid; USD 120,000 - 170,000; Full time

Benefits offered by this job

Medical and Prescription Drug Plans

Dental Plan

Vision Plan

Health Savings Account

Health Flexible Spending Account

Dependent Care Flexible Spending

Supplemental Life Insurance

Short Term and Long Term Disability

Business Travel Insurance

401(k), Plus Match

Weekly Pay

Job summary

Experis is seeking a Senior Mainframe Systems Engineer to join a leading technology organization in a hybrid role based in Chandler, AZ. You will design, implement, and optimize z/OS platform tools, providing expert guidance to enterprise teams while driving automation and standardization across mainframe operations.

The role emphasizes hands-on maintenance of z/OS, USS, SMP/E and JES2, with collaboration across infrastructure and engineering groups to deliver high-availability enterprise

Qualifications

• Proven experience configuring, maintaining and supporting the z/OS operating system and related tools.
• Hands-on scripting and automation to improve reliability and efficiency.
• Experience with z/OS UNIX System Services (USS) and zFS configuration.
• Strong knowledge of JES2, job classes, initiator management, spool tuning, and workload controls.
• Proficiency in TSO/ISPF, panels, utilities, and operational support.

Responsibilities

• Design, engineer, and maintain z/OS platform tools and services following enterprise standards and security policies.
• Provide subject-matter expertise in z/OS infrastructure to engineering teams.
• Translate requirements into detailed z/OS designs, deployment blueprints, and runbooks.
• Develop and enhance automation, scripts, and tooling for reliability and efficiency.
• Create reusable templates and playbooks to standardize system builds and operations.

Skills

z/OS expertise

Automation scripting

UNIX System Services

TSO/ISPF

JES2 administration

REXX/BAL/Assembler

Tools

SMP/E

REXX

BAL/Assembler

Job description

Our client, a leading organization in the technology sector, is seeking a dedicated and experienced Senior Mainframe Systems Engineer to join their dynamic team. As a Senior Mainframe Systems Engineer, you will be an integral part of the Mainframe Operations Department supporting enterprise-level mainframe infrastructure. The ideal candidate will demonstrate strong problem-solving skills, excellent communication, and a proactive approach to system optimization, which will align successfully in the organization.

Job Title

Senior Mainframe Systems Engineer

Location

Plano, Charlotte, Pennington, Jersey City, Chandler AZ (Hybrid)

What's the Job?

• Design, engineer, and maintain z/OS platform tools and services in accordance with enterprise standards, governance, and security policies
• Provide subject-matter expertise in z/OS infrastructure, supporting application, infrastructure, and engineering teams with technical consultation and best practices
• Translate business and operational requirements into detailed z/OS technical designs, deployment blueprints, standards, and runbooks
• Develop and enhance automation, scripts, and tooling to improve system reliability and operational efficiency
• Create reusable templates and playbooks to standardize system builds, configurations, and ongoing operations

What's Needed?

• Extensive experience configuring, maintaining, and supporting the z/OS operating system, including installing releases, applying maintenance, and managing PTFs, APARs, and USERMODs using SMP/E
• Proficiency in developing and maintaining system utilities, exits, and automation using REXX and Basic Assembly Language (BAL/Assembler)
• Hands-on experience administering z/OS UNIX System Services (USS), including file system management, permissions, scripting, and zFS configuration
• Experience configuring and supporting JES2, including job class definitions, initiator management, spool tuning, and workload controls
• Strong knowledge of TSO/ISPF, including panel usage, utility execution, and operational support

What's in it for me?

• Opportunity to work with cutting-edge mainframe technologies in a collaborative environment
• Engage in innovative projects that enhance enterprise system performance and reliability
• Gain valuable experience supporting high-availability, regulated enterprise environments
• Collaborate with a diverse and inclusive team of professionals
• Contribute to continuous improvement and modernization initiatives within the organization

Benefits

• Medical and Prescription Drug Plans
• Dental Plan
• Vision Plan
• Health Savings Account
• Health Flexible Spending Account
• Dependent Care Flexible Spending Account
• Supplemental Life Insurance
• Short Term and Long Term Disability Insurance
• Business Travel Insurance
• 401(k), Plus Match
• Weekly Pay