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Mainframe Systems Programmer Jobs in California (NOW HIRING)

Robert Half

Mainframe Systems SME

Burbank, CA · On-site

$55 - $57/hr

This role is a Mainframe Systems SME for a long-term, muti-year assignment with our client ... Working knowledge of software engineering, software development, solution architecture and ...

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 ...

WATI

Mainframe Application Programmer

Downey, CA · On-site

The Senior Application Programmer for Mainframe Systems will possess knowledge and experience in applications software development principles and methods sufficient to participate in the design ...

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Mainframe Systems Programmer information

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How much do mainframe systems programmer jobs pay per hour?

As of Jul 5, 2026, the average hourly pay for mainframe systems 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.

Are mainframe jobs in demand?

Mainframe systems programmers are in steady demand due to the continued reliance of large organizations on mainframe infrastructure for critical applications. Skills in COBOL, JCL, and mainframe security are highly valued, and many companies seek experienced professionals to maintain and upgrade legacy systems. The demand remains stable, especially in finance, government, and healthcare sectors that depend on mainframe technology.

What does a mainframe systems programmer do?

A mainframe systems programmer is responsible for installing, maintaining, and troubleshooting mainframe operating systems and software. They configure hardware, optimize system performance, and ensure security and reliability, often using tools like z/OS and JCL. Strong knowledge of system architecture and scripting is essential for this role.

Can mainframe be replaced by AI?

Mainframe systems programmers manage and maintain large-scale mainframe environments that run critical enterprise applications. While AI can automate certain tasks like monitoring and troubleshooting, it is unlikely to fully replace the specialized skills required for mainframe system programming, which involves complex configuration, security, and performance tuning. Mainframes remain essential in industries with high-volume transaction processing, and programmers need expertise in languages like COBOL and tools such as z/OS.

What Does a Mainframe Systems Programmer Do?

As a mainframe systems programmer, your responsibilities are to maintain an organization’s server computer, also called a mainframe computer. Your duties include handling server configuration, as well as installing, upgrading, and customizing the operating system and other software necessary for running the server and its databases. You also work with other IT professionals with the planning of security measures to protect the mainframe and routinely perform tests for bugs and other security issues.

What are some common challenges Mainframe Systems Programmers face when maintaining legacy systems?

Mainframe Systems Programmers often encounter challenges related to supporting and upgrading legacy systems that may have limited documentation or use outdated programming languages. Navigating compatibility issues with newer hardware or software can require creative problem-solving and deep technical expertise. Additionally, ensuring system security and reliability while performing upgrades or patches involves careful planning and collaboration with other IT and business teams. Staying current with evolving mainframe technologies and practices is essential for long-term success in the role.

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

AspectMainframe Systems ProgrammerMainframe Application Developer
CredentialsTypically requires certifications like IBM Certified Systems ProgrammerOften requires programming certifications or specific language expertise
Work EnvironmentWorks primarily on system-level tasks, OS, and hardware interactionsFocuses on developing and maintaining applications on mainframe platforms
Employer & Industry UsageCommon in large enterprises with mainframe infrastructureAlso in large organizations, but more application-focused
Job FocusSystem configuration, performance tuning, and maintenanceApplication coding, testing, and deployment

The Mainframe Systems Programmer primarily manages system-level tasks, ensuring the mainframe environment runs efficiently, while the Mainframe Application Developer focuses on creating and maintaining applications. Both roles are essential in mainframe environments but differ in their technical focus and responsibilities.

What are Mainframe Systems Programmers?

Mainframe Systems Programmers are IT professionals responsible for installing, configuring, maintaining, and troubleshooting mainframe computer systems and software. They ensure that the mainframe environment runs efficiently, securely, and reliably, supporting critical business operations. Their duties often include system upgrades, performance tuning, applying patches, and collaborating with other IT teams to resolve complex technical issues. Mainframe Systems Programmers play a key role in organizations that rely on large-scale transaction processing, such as banks, insurance companies, and government agencies.

What is the salary of a mainframe developer?

The salary of a mainframe systems programmer typically ranges from $70,000 to $120,000 annually, depending on experience, location, and certifications. Senior roles or those with specialized skills in COBOL, JCL, or mainframe security may earn higher salaries. Compensation often includes benefits such as health insurance and retirement plans.

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

To thrive as a Mainframe Systems Programmer, you need expertise in system programming, operating systems like z/OS, and strong problem-solving abilities, usually supported by a degree in computer science or related field. Familiarity with mainframe tools such as IBM z/OS utilities, JCL, REXX, and experience with system monitoring and performance tuning software are commonly required. Attention to detail, analytical thinking, and effective communication skills help ensure smooth collaboration and troubleshooting. These skills are essential to maintain, optimize, and secure critical enterprise computing environments that rely on mainframe infrastructure.
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Mainframe Systems Programmer jobs near you
Infographic showing various Mainframe Systems Programmer job openings in California as of June 2026, with employment types broken down into 50% Full Time, and 50% Contract. Highlights an 100% In-person job distribution, with an average salary of $119,422 per year, or $57.4 per hour.
Mainframe Systems SME

Mainframe Systems SME

Robert Half

Burbank, CA • On-site

$55 - $57/hr

Temporary

Posted 12 days ago

Job description

This role is a Mainframe Systems SME for a long-term, muti-year assignment with our client.


Responsibilities:

Successful candidate will assume the role of Mainframe Systems SME and assist the Project Manager and/or Team Manager on various Parts Applications projects. Ability to analyze business requirements and create and manage the completion of units of work completed by the successful candidate and other team members. Assigned units of work vary from >100 hour enhancements, up to team member on a large project. Responsible for gathering requirements, functional and Detailed analysis/design, testing (unit, integration, system, user acceptance), implementation, documentation, warranty. Defining architectural solutions to meet application requirements. Providing status to Project Manager/Lead, as needed.

Analysis/Design roughly 30-40%, Development (code, unit test, int test, system test, UAT, Implement, Warranty) roughly 30-40%, Architectural solutions roughly 20-40%

Proficient in COBOL,CICS, JCL, IMS, VSAM,DB2, and System Development Life Cycle Concepts. Experience working in Microsoft development technologies i.e. .Net core, MVC.Net, C#,

Angular is a plus. Working knowledge of software engineering, software development, solution architecture and implementation of medium to large scale systems across multiple platforms Ability to collaborate with multiple disciplines across the enterprise Understanding of technology strategy, technology standards, roadmaps, and practices Technical aptitude of multi‐tier and cross‐platform architectures across the enterprise. Understanding in the information technology landscape ‐stretching from infrastructure, network, client, server, emerging technology standards and trends. Experience with Waterfall and Agile methodology. Knowledge or Automotive Parts Systems, Warehousing and Supply Chain is a plus.

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About Robert Half

Sourced by ZipRecruiter

Founded in 1948, Robert Half pioneered the idea of professional talent solutions to connect opportunities at great companies with highly skilled job seekers. As business needs changed, we evolved to offer specialized talent solutions for finance and accounting, technology, administrative and customer support, creative and marketing, and legal fields. In 2002, we introduced our subsidiary, Protiviti, a global independent risk consulting and internal audit service, to support companies as they faced more strategic business challenges.

Industry

Recruiting and staffing services

Company size

10,000+ Employees

Headquarters location

San Ramon, CA, US

Year founded

1948

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