Senior Application Programmer - Mainframe Systems

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Senior Application Programmer - Mainframe Systems

By / September 4, 2026

• Location: Cerritos, California
• Type: Contract
• Job #106637

Senior Application Programmer - Mainframe Systems

? Cerritos, CA (Onsite)

? $75-$80/hour

? 12-Month Contract with Potential Extension

We are seeking an experienced Senior Application Programmer - Mainframe Systems to support the development, maintenance, enhancement, and implementation of complex enterprise applications in a large-scale mainframe environment. This role will be responsible for designing, coding, testing, troubleshooting, and supporting critical business applications while collaborating with technical and business stakeholders.

Key Responsibilities

• Design, develop, modify, test, implement, and support complex mainframe applications.
• Analyze business and system requirements and translate them into technical solutions.
• Develop and maintain application architecture, program specifications, and technical documentation.
• Troubleshoot and resolve application issues while ensuring system reliability and performance.
• Perform coding, debugging, testing, and implementation of new and existing software solutions.
• Support database integrations, transaction processing, and enterprise application functionality.
• Evaluate and recommend improvements to application design, processes, and technologies.
• Ensure compliance with information security policies and best practices.
• Collaborate with technical teams and business users throughout the development lifecycle.

Required Qualifications

• 7+ years of experience in electronic data processing systems design and programming.

• 7+ years of hands-on experience with IMS, DB2, COBOL, and CICS programming in a mainframe environment.

• Strong experience with:

• COBOL

• IMS/DB/DC

• DB2/SQL

• CICS

• JCL

• MVS TSO/ISPF

• VSAM

• CA Endevor

• IBM z/OS

• Experience with database technologies including DB2, IMS, ADABAS, and FOCUS.

• Knowledge of systems design, software development methodologies, testing, implementation, and support.

• Strong problem-solving, analytical, and communication skills.

Preferred Skills

• Natural/SuperNatural
• Assembler
• SAS
• CA Gen (CoolGen)
• IBM WebSphere
• IBM OPTIM
• File Manager
• SPUFI
• ICEMAN/ICETOOLS
• EntireX
• HTML
• ASP
• Cloverleaf

Education

• Bachelors degree in Computer Science, Information Technology, or a related field.
• Additional qualifying experience may be substituted for education on a year-for-year basis.

Work Environment

• Initially onsite Monday through Friday.
• Opportunity for limited telework (up to 2 days per week) based on project requirements after onboarding.
• Standard business hours.

Additional Requirements

• Must possess strong experience supporting and maintaining enterprise-level mainframe systems.
• Ability to work independently and collaboratively in a complex technical environment.
• Strong written and verbal communication skills.

This opportunity is ideal for a seasoned Mainframe Developer with expertise in COBOL, IMS, DB2, CICS, JCL, and z/OS who is looking to contribute to critical enterprise applications in a highly visible and impactful role.

#LI-EA1

#INDPRO

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