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Mainframe System Programmer Jobs in California (NOW HIRING)

Ensono

Director, Mainframe Systems Programming

Los Angeles, CA · On-site

$59.25 - $75.50/hr

Experienced in one or more mainframe infrastructure, hardware, system programming technologies. Alternative experiences must include high learning agility to acquire mainframe technology knowledge ...

Robert Half

Mainframe Systems SME

Burbank, CA · On-site

$55 - $57/hr

Analysis/Design roughly 30-40%, Development (code, unit test, int test, system test, UAT, Implement ... Working knowledge of software engineering, software development, solution architecture and ...

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How much do mainframe system programmer jobs pay per hour?

As of Jul 5, 2026, the average hourly pay for mainframe system programmer in California is $57.41, according to ZipRecruiter salary data. Most workers in this role earn between $52.21 and $66.44 per hour, depending on experience, location, and employer.

What are the key skills and qualifications needed to thrive as a Mainframe System Programmer, and why are they important?

To thrive as a Mainframe System Programmer, you need deep knowledge of mainframe operating systems (such as z/OS), programming languages like COBOL or Assembler, and a degree in computer science or a related field. Familiarity with mainframe tools (e.g., IBM ISPF, JCL, SMP/E) and certifications such as IBM Certified System Programmer are typically required. Analytical thinking, problem-solving, and effective communication are crucial soft skills for diagnosing issues and collaborating with IT teams. These skills are vital to ensure the stability, security, and efficiency of critical enterprise computing environments.

What are some common challenges Mainframe System Programmers face when supporting legacy systems?

Mainframe System Programmers often encounter challenges such as integrating modern applications with legacy mainframe environments, ensuring system security while maintaining uptime, and troubleshooting complex issues that span both old and new technologies. They may also face difficulties due to limited documentation or retiring expertise as experienced colleagues leave the workforce. Staying current with evolving mainframe tools and best practices helps address these challenges and keeps systems running smoothly.

What is the difference between Mainframe System Programmer vs Mainframe Application Developer?

AspectMainframe System ProgrammerMainframe Application Developer
Required CredentialsCertifications in mainframe systems, such as IBM Certified System ProgrammerProgramming certifications, often in COBOL, Java, or other languages
Work EnvironmentOperate primarily on mainframe hardware, focus on system setup and maintenanceDevelop and modify applications running on mainframes
Employer & Industry UsageUsed by organizations with large-scale legacy systems, banking, insuranceDevelops business applications for mainframe environments in similar industries

While both roles work within mainframe environments, Mainframe System Programmers focus on system setup, maintenance, and optimization, whereas Mainframe Application Developers concentrate on creating and updating applications that run on mainframes. Understanding these differences helps in choosing the right career path or job search focus.

What are mainframe system programmers?

Mainframe system programmers are IT professionals who specialize in installing, configuring, maintaining, and optimizing mainframe computer systems. They are responsible for the underlying software infrastructure, such as operating systems (like IBM z/OS), network configurations, and middleware. Their work ensures that mainframe environments run efficiently, securely, and with minimal downtime, supporting critical applications for large organizations. System programmers also troubleshoot complex issues and implement updates or enhancements as needed.
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Mainframe System Programmer jobs near you
Senior Mainframe Systems Programmer

Senior Mainframe Systems Programmer

West Advanced Technologies (WATI)

Downey, CA • On-site

Full-time

Posted 3 days ago

Job description

Senior Mainframe Systems Programmer
Downey, CA - (Onsite)
12+ months
Description:
The Senior Systems Programmer for Legacy Systems, for maintenance and support of Z/OS systems, is responsible for planning and upgrading the systems on a County-established basis, verifying the health of all systems, and making necessary changes as required. This includes analyzing the issues reported by development teams making necessary recommendations; planning and designing systems architecture; working with customers to test applications post-upgrade; ensuring software is compatible with operating systems; upgrading hardware in a timely manner with minimum downtime windows; evaluating new application software technologies; and/or ensuring that relevant security products are patched on a regular basis. The Senior Systems Programmer for Legacy Systems, for development of operating systems, is responsible for analyzing systems requirements, risks and costs; evaluating, selecting, verifying and validating systems software environments; evaluating, selecting and installing compilers, assemblers and utilities; integrating hardware and software components within systems environments; monitoring and fine-tuning performance of systems environments; evaluating new systems engineering technologies and subsequent effects on operating environments; and/or ensuring that information security/information assurance policies, principles and practices are integral elements of operating environments.
Required Skills:
A Senior Mainframe Systems Programmer is responsible for leading and/or supporting the most complex IT infrastructure, modification, installation, testing, implementation, maintenance and enhancements of new or existing system software products. This classification must plan, install, configure, test, implement and manage core system software products in support of the County's IT architecture and business needs. Special organizational or functional industry position titles for systems programmer include, but are not limited to, Z/OS System Administrator, MVS Systems Administrator, CICS/IMS/DB2/ADABAS Systems Programmer, and Z/OS Network and Storage Administrator. The following technology skill sets are required to perform in this classification -IBM: Z/.OS, IMS, DB2, ADABAS, SMP/E, JCL, IMS DB/DC, CICS, ACF2, ASSEMBLER/ COBOL/ REXX, CONTROL-M, VTAM, TCPIP, NETVIEW, NATURAL/ SUPERNAT, ENTIREX, CA SPOOL, IMS & DB2 BMC Tools, HMC/HOD/IODF, VTS
Must have a minimum of seven (7) years of experience in Z/OS Systems programming, with at least four (4) years of that experience in a lead role.
This classification requires the possession of a bachelor's degree in an IT-related or engineering field.
Regards
Sunil Damagalla
West Advanced Technologies, Inc
E: sunil.d@wati.com D: 279-666-5837

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