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Mainframe Assembler Jobs in California (NOW HIRING)

WATI

Mainframe Operator

Downey, CA · On-site

$50.75 - $65/hr

Mainframe Operator Location: Downey, CA Duration: 12 months Description: The Information Technology ... IBM, Z/OS, CICS, NATURAL/SUPERNAT, IMS, DB2, ADABAS, ACF2, ENTIREX, SMP/E, ASSEMBLER/COBOL/REXX, CA ...

West Advanced Technologies (WATI)

Mainframe Operator

Downey, CA · On-site

$50.75 - $65/hr

Mainframe Operator Location: Downey, CA Duration: 12 months Description: The Information Technology ... IBM, Z/OS, CICS, NATURAL/SUPERNAT, IMS, DB2, ADABAS, ACF2, ENTIREX, SMP/E, ASSEMBLER/COBOL/REXX, CA ...

Accenture

Mainframe Specialist

Irvine, CA · On-site

$70K - $196K/yr

COBOL, JCL, VSAM, CICS, DB2, Assembler, REXX, SPUFI, TSO/ISPF, or RACF. * Minimum 3+ years leading or executing mainframe modernization initiatives with a demonstrable track record of delivery.

Accenture

Mainframe Specialist

Mountain View, CA · On-site

$70K - $196K/yr

COBOL, JCL, VSAM, CICS, DB2, Assembler, REXX, SPUFI, TSO/ISPF, or RACF. * Minimum 3+ years leading or executing mainframe modernization initiatives with a demonstrable track record of delivery.

Accenture

Mainframe Specialist

San Francisco, CA

$70K - $196K/yr

COBOL, JCL, VSAM, CICS, DB2, Assembler, REXX, SPUFI, TSO/ISPF, or RACF. * Minimum 3+ years leading or executing mainframe modernization initiatives with a demonstrable track record of delivery.

Accenture

Mainframe Specialist

San Diego, CA · On-site

$70K - $196K/yr

COBOL, JCL, VSAM, CICS, DB2, Assembler, REXX, SPUFI, TSO/ISPF, or RACF. * Minimum 3+ years leading or executing mainframe modernization initiatives with a demonstrable track record of delivery.

Accenture

Mainframe Specialist

Sacramento, CA

$70K - $196K/yr

COBOL, JCL, VSAM, CICS, DB2, Assembler, REXX, SPUFI, TSO/ISPF, or RACF. * Minimum 3+ years leading or executing mainframe modernization initiatives with a demonstrable track record of delivery.

Accenture

Mainframe Specialist

Walnut Creek, CA

$70K - $196K/yr

COBOL, JCL, VSAM, CICS, DB2, Assembler, REXX, SPUFI, TSO/ISPF, or RACF. * Minimum 3+ years leading or executing mainframe modernization initiatives with a demonstrable track record of delivery.

Accenture

Mainframe Specialist

Los Angeles, CA

$70K - $196K/yr

COBOL, JCL, VSAM, CICS, DB2, Assembler, REXX, SPUFI, TSO/ISPF, or RACF. * Minimum 3+ years leading or executing mainframe modernization initiatives with a demonstrable track record of delivery.

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How much do mainframe assembler jobs pay per hour?

As of Aug 20, 2026, the average hourly pay for mainframe assembler in California is $52.68, according to ZipRecruiter salary data. Most workers in this role earn between $46.49 and $59.81 per hour, depending on experience, location, and employer.

What is a mainframe assembler?

A Mainframe Assembler job involves programming in assembly language on IBM mainframe systems. Assemblers write low-level code to optimize system performance, handle critical processes, and interact with hardware directly. These professionals work with legacy systems, maintaining and enhancing core applications used in industries like banking, insurance, and government. Strong knowledge of IBM z/OS, JCL, and debugging tools is essential.

What are the typical daily responsibilities of a mainframe assembler?

Mainframe Assemblers are typically responsible for writing, testing, and maintaining assembler language programs that run on enterprise mainframe systems. Their day-to-day tasks often include analyzing system requirements, coding program logic, debugging complex routines, and optimizing performance for high-volume processing. They frequently collaborate with systems analysts, application developers, and operations teams to ensure seamless integration and reliability of mainframe applications. Staying current with system updates and responding quickly to troubleshooting requests is also an important part of the job.

What are the key skills and qualifications needed to thrive as a mainframe assembler?

To thrive as a Mainframe Assembler, you need a strong background in assembly language programming, mainframe operations, and a solid understanding of systems architecture—often backed by a degree in computer science or related field. Experience with IBM z/OS, JCL (Job Control Language), and tools such as ISPF, along with certifications like IBM Certified System Programmer, is highly beneficial. Attention to detail, problem-solving abilities, and effective communication skills help distinguish top performers in this position. These skills are crucial to ensure accurate and efficient program development, system stability, and smooth collaboration within complex mainframe environments.

What are popular job titles related to Mainframe Assembler jobs in California?

For Mainframe Assembler jobs in California, the most frequently searched job titles are:

What job categories do people searching Mainframe Assembler jobs in California look for?

The top searched job categories for Mainframe Assembler jobs in California are:

Mainframe Assembler jobs near you
Infographic showing various Mainframe Assembler job openings in California as of August 2026, with employment types broken down into 100% Contract. Highlights an 100% In-person job distribution, with an average salary of $109,572 per year, or $52.7 per hour.

Mainframe Consultant

West Advanced Technologies (WATI)

Sacramento, CA • On-site

Full-time

Re-posted 4 days ago

Job description

Mainframe Consultant
Sacramento, CA
24+ months
Onsite
Required Skills:
Must have a minimum of ten (10) years of experience in mainframe application support and/or development. Proficient in IBM mainframe environments such as DB2, Customer Information Control System (CICS), MQ, and Time-Sharing Option/Interaction System Productivity Facility (TSO/ISPF).
Must have a minimum of ten (10) years of experience working with IBM Mainframe Languages such as COBOL, Assembler, Virtual Storage Access Method (VSAM), Job Control Language (JCL), Restructured Extended Executor (REXX) at the subject matter expert level, including analysis, design, coding, and testing.
Must have a minimum of ten (10) years of experience working with CA Endevor Software Migration Control Manager, or similar.
Must have a minimum of ten (10) years of experience in producing written technical documentation, including the use of flow-charting software.
Bachelor's Degree in an IT-related or Engineering field.
Desired Skills:
Must have a minimum of fifteen (15) years of experience of software development lifecycle (SDLC) best practices.
Minimum of ten (10) years of experience in Oracle, Natural, or COBOL.
Must have a minimum of five (5) years of experience with training and mentoring programmers in z/OS Assembler language.
Must have a minimum of two (2) years of experience working in a public sector transportation agency
Regards
Sunil Damagalla
West Advanced Technologies, Inc
E: sunil.d@wati.com , D: 279-666-5837

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