Senior Mainframe Systems Engineer

  •  Reference Number: 406541
  •  Posted: 08/04/2026
  •  Job Type: Contract

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

Upon completion of waiting period consultants are eligible for:

  • 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

If this is a role that interests you and you'd like to learn more, click apply now and a recruiter will be in touch with you to discuss this great opportunity. We look forward to speaking with you!

About ManpowerGroup, Parent Company of: Manpower, Experis and Talent Solutions.

Experis® is a global leader in technology services and part of the ManpowerGroup® (NYSE: MAN) family of brands. We connect skilled technology professionals with meaningful opportunities where they can grow their careers, expand their expertise and make a real impact. Guided by the belief that it takes Human Ingenuity to unlock the true potential of technology, Experis helps people gain experience with leading organizations, build sought-after skills and take the next step toward a brighter future. Backed by ManpowerGroup's 75+ years of workforce expertise and global reach across more than 70 countries and territories, Experis brings the scale, insight and opportunity to help people and businesses thrive. ManpowerGroup is consistently recognized for its commitment to inclusion, ethics and responsible business, including being named one of the World's Most Ethical Companies. Learn more at Experis.com.

Chandler, AZ

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