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Mainframe Assembler Programmer Jobs (NOW HIRING)

Innova Solutions, Inc

Mainframe Assembler Developer

Addison, TX · On-site

$60 - $65/hr

  • Medical

  • Dental

  • Vision

  • Life

  • Retirement

Addison, TX or Charlotte, NC As a Mainframe Assembler Developer, you will: We are seeking a highly experienced Mainframe Assembler Developer to support and enhance a mission-critical legacy ...

Kaav Inc

Mainframe Assembler

Alpharetta, GA · On-site

$47.75 - $61.50/hr

Mainframe Assembler Location: Alpharetta, GA/Omaha, NE (Locals Only) Relevant Experience: 12+ Years ... Lead developer in associates and Issuer mandates and enhancements. * Should involve in code reviews ...

Hirekeyz Inc

Mainframe IMS DB Developer

Plano, TX · On-site

$47 - $60.25/hr

Hands-on experience in Mainframe Assembler programming, IMS, DB2 * Experience in developing, debugging, and maintaining code in a large corporate environment with one or more modern programming ...

Hirekeyz Inc

Mainframe IMS DB Developer

Wilmington, DE · On-site

$47.50 - $61.25/hr

Hands-on experience in Mainframe Assembler programming, IMS, DB2 * Experience in developing, debugging, and maintaining code in a large corporate environment with one or more modern programming ...

Sonsoft Inc

Mainframe Assembler Consultant

Omaha, NE · On-site

Exposure to Assembler programming on CICS environment. Strong technical aptitude and experience with the software tools and techniques used in software development Strong collaboration skills and ...

Corinth

Mainframe DBA/COBOL Programmer

Leesburg, VA · Remote

$86K - $97K/yr

  • Medical

  • Dental

  • Vision

  • Life

  • Retirement

  • PTO

Proficiency in COBOL, JCL, and Assembler programming languages for mainframe application development and sustainment. * Experience with mainframe database administration, including database structure ...

JS Consulting

Sr. Mainframe Developer

Woodlawn, MD · On-site

$51 - $65.50/hr

Experience with Mainframe Assembler development. * Certification such as IBM Mainframe Developer Professional, Interskill - Mainframe Application Programmer - COBOL and IBM Enterprise COBOL for z/OS ...

MM International

Adabas mainframe

Atlanta, GA · Remote

$50.25 - $64.50/hr

Adabas mainframe Looking for a ADABAS DBA/ Developer/ ADABAS production support/ Mainframe ... Assembler programming Minimum EDUCATIONAL and EXPERIENCE REQUIREMENTS University Degree (B.S.) and ...

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How much do mainframe assembler programmer jobs pay per hour?

As of Aug 15, 2026, the average hourly pay for mainframe assembler programmer in the United States is $54.11, according to ZipRecruiter salary data. Most workers in this role earn between $47.12 and $63.22 per hour, depending on experience, location, and employer.

What are the typical day-to-day responsibilities of a mainframe assembler programmer?

As a Mainframe Assembler Programmer, your daily tasks often include writing, testing, and debugging assembler code to support core business applications and system utilities. You’ll work closely with systems analysts, application developers, and operations teams to troubleshoot issues, optimize program performance, and implement software enhancements. Regular responsibilities may also involve reviewing system logs, maintaining documentation, and participating in system upgrades or migrations. The role often requires a proactive approach to problem-solving and collaboration within a structured, process-driven team environment.

Are mainframe assembler programmer jobs in demand?

Mainframe assembler programmer jobs remain in demand in industries that rely on legacy systems, such as finance, government, and insurance. These roles require knowledge of mainframe environments, assembly language, and often involve maintaining or upgrading existing mainframe applications. Demand is steady due to the continued use of mainframes for critical business operations.

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

To thrive as a Mainframe Assembler Programmer, you need strong expertise in low-level programming, a deep understanding of mainframe architectures (such as IBM z/OS), and often a degree in computer science or related field. Familiarity with tools like TSO, ISPF, JCL, and debugging utilities, along with experience using source control and system monitoring software, is highly valued, and certifications in mainframe technology can be beneficial. Excellent problem-solving abilities, meticulous attention to detail, and effective communication skills help you succeed in complex, team-based environments. These technical and interpersonal abilities are critical for maintaining system reliability, ensuring performance, and supporting business operations across large-scale enterprises.

What does a mainframe assembler programmer do?

A mainframe assembler programmer writes and maintains low-level assembly language code for mainframe computers, often working on system software, utilities, or application programs. They use tools like IBM Assembler and need a strong understanding of computer architecture, machine instructions, and debugging techniques to optimize performance and ensure system stability.

Is mainframe assembler programming difficult?

Mainframe assembler programming is considered complex due to its low-level nature, requiring a strong understanding of hardware architecture, memory management, and instruction sets. It often involves detailed coding and debugging, making it challenging for those without prior experience in systems programming or assembly language. Proficiency in tools like IBM's assembler and knowledge of mainframe environments are essential for success.

What is a mainframe assembler programmer?

A Mainframe Assembler Programmer is responsible for writing, maintaining, and optimizing assembly language programs that run on mainframe computers. They work with low-level machine instructions to develop high-performance applications, often in industries like banking, insurance, and government. Their role includes debugging, performance tuning, and integrating new or existing software with mainframe systems. Strong knowledge of IBM mainframes, z/OS, and tools like High-Level Assembler (HLASM) is essential.

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Mainframe Assembler Programmer jobs near you
Infographic showing various Mainframe Assembler Programmer job openings in the United States as of August 2026, with employment types broken down into 80% Full Time, 9% Part Time, 1% Temporary, 6% Contract, and 4% Nights. Highlights an 100% Physical job distribution, with an average salary of $112,558 per year, or $54.1 per hour.

Mainframe Assembler

Donato Technologies, Inc

Wilmington, DE • On-site

$60/hr

Contractor

Re-posted 10 hours ago

Job description

RTTO – 5 Days Onsite

Job Description:


Design, coding, and testing: Mainframe assemblers are responsible for designing, coding, and testing application programs using the IBM Assembler language. They should also be familiar with the entire Software Development Life Cycle (SDLC) and have a solid understanding of mainframe operating systems, such as z/OS. 


Debugging and troubleshooting: They perform debugging and troubleshooting of mainframe applications to ensure they function correctly and efficiently. 


Documentation: Mainframe assemblers may also be responsible for documenting the design of the assembler programs, explaining how they work, and providing guidelines for their use. 

Technical support: They provide technical support for mainframe systems, optimizing performance, and ensuring compliance with coding standards and technical design. 

These assemblers work closely with system architects and analysts to understand the requirements and specifications of a system, and then translate these into efficient, low-level machine code. They must keep themselves updated with the latest mainframe technologies and assembler programming techniques to ensure the continuous functionality and reliability of mainframe systems. 

Donato Technologies Inc. is a trusted IT staffing, consulting, and software development partner headquartered in Dallas, Texas. We support clients across industries by understanding their unique business needs and delivering tailored technology and workforce solutions. Our focus is on connecting the right talent with the right opportunity-ensuring clients receive dependable, skilled professionals and candidates receive meaningful career growth and support. We work closely with small to mid-sized organizations to provide flexible, high-quality services that drive performance, innovation, and long-term success.