Mainframe z/OS Systems Programmer
Job in
Milwaukee, Milwaukee County, Wisconsin, 53244, USA
Listed on 2026-06-02
Listing for:
Fairygodboss
Full Time
position Listed on 2026-06-02
Job specializations:
-
IT/Tech
Systems Engineer, Systems Administrator, IT Support, Cloud Computing
Job Description & How to Apply Below
About the Job
This is a mainframe role focused on IBM z/OS environments. While the role exists within the broader Software Engineering family, day‑to‑day responsibilities are exclusively centered on z/OS platform engineering and operations. Experience with distributed systems or cloud technologies is not required for success in this position.
What You’ll Do- Mentor, enable, and teach peers to be self‑sufficient within the mainframe platform
- Apply engineering standard methodologies to analyze, design, and maintain z/OS system‑level solutions
- Leverage established standards, best practices, and automation to support mission‑critical mainframe workloads
- Identify complex system‑level problems and implement reliable, supportable solutions in a highly regulated production environment
- Review, verify, and validate system‑level changes, configurations, and automation introduced into production
- Drive continuous improvement across reliability, availability, performance, security, and operational efficiency
- Develop, maintain, and execute disaster recovery and redundancy strategies
- Partners with vendors and enterprise teams on emerging best practices, patterns, and technologies
- Proactively learn emerging platforms and related technologies
- Establish and maintain best practices related to compliance, security, privacy, and legal requirements
- Anticipate deviations from standard practices and determine practical paths forward
- Track industry trends relevant to the domain and apply them where appropriate
- Break down complex problems into manageable components and help others do the same
- Perform hands‑on z/OS system administration including IPLs, system startup/shutdown, parameter tuning, and system recovery
- Plan, execute, and validate IBM and ISV software installs and upgrades using z/OSMF Software Instances and Workflows
- Manage SMP/E environments including PTFs, HOLDDATA, USERMODs, and consolidation builds
- Install, analyze, and modify system exits and USERMODs, including assembler updates when required
- Build and maintain system‑resident DASD volumes, system libraries, and reproducible system builds
- Configure and administer JES2
- Administer RACF security including users, groups, profiles, access controls, and policy enforcement
- Author, debug, and optimize JCL for batch processing
- Analyze SMF/RMF data for accounting, capacity planning, and system performance tuning
- Administer and tune DFSMS components including DFSMShsm and DFSMSrmm
- Configure and troubleshoot TCP/IP for z/OS and associated services
- Develop automation and tools using REXX, CLIST, and UNIX System Services scripting
- Use monitoring tools such as BMC Main View and/or Intellimagic Vision
- Support mainframe hardware environments including HMC operations, CPC/LPAR configuration, and IBM zSeries platforms
- Participate in on‑call rotations and ITIL‑aligned incident, change, and problem management
- Coordinate with vendors and ISVs for licensing, problem determination, and PTF coordination
- Create and maintain documentation, runbooks, SOPs, and operational procedures
- Mentor and train junior staff on z/OS engineering and operational practices
Note:
This position requires deep experience in IBM z/OS systems programming. Candidates whose background is primarily AWS, Linux, Windows, or distributed/cloud platforms without substantial mainframe experience are unlikely to be a fit.
- Bachelor’s degree or equivalent experience
- At least 4 years of relevant experience
- 5+ years of professional IT experience, primarily focused on enterprise mainframe platforms
- Experience applying Dev Ops concepts, Agile methodologies, and automation in mainframe environments
- Experience monitoring and tuning performance of large‑scale systems
- Working knowledge of scripting or programming concepts for automation
- Familiarity with authentication, authorization, certificates, and vulnerability management
- Extensive hands‑on experience as a z/OS Systems Programmer in production environments
- Strong knowledge of z/OS internals, JES2, RACF, SMP/E, and system libraries
- Proven expertise in SMF/RMF‑based performance tuning, capacity planning,…
To View & Apply for jobs on this site that accept applications from your location or country, tap the button below to make a Search.
(If this job is in fact in your jurisdiction, then you may be using a Proxy or VPN to access this site, and to progress further, you should change your connectivity to another mobile device or PC).
(If this job is in fact in your jurisdiction, then you may be using a Proxy or VPN to access this site, and to progress further, you should change your connectivity to another mobile device or PC).
Search for further Jobs Here:
×