Senior Mainframe Developer (COBOL, CICS & DB2)

Delta Computer Consulting; Los Angeles (CA); Hybrid; USD 81,000 - 91,000; Full time

Benefits offered by this job

Health Insurance

Vision Insurance

Dental Insurance

Life Insurance

401k

Continuing and on-demand education

Job summary

Delta Computer Consulting is seeking a Senior Mainframe Developer to support enterprise Parts Applications and Supply Chain systems in a large automotive environment. You will lead analysis, design, development, testing, and production support for mission-critical mainframe applications using COBOL, CICS, JCL, IMS, VSAM, and DB2.

The role requires deep mainframe expertise, SDLC mastery, and collaboration with project managers, business stakeholders, and development teams.

Qualifications

• Bachelor's degree or equivalent experience.
• Advanced COBOL, CICS, JCL, IMS, VSAM and DB2 expertise.
• Experience with SDLC and enterprise-level systems.

Responsibilities

• Lead analysis, design, development, testing and production support for mainframe apps.
• Collaborate with PMs, BAs, Architects and QA throughout SDLC.
• Develop and maintain COBOL-based mainframe components (CICS/JCL/IMS/DB2).
• Provide unit, integration and UAT testing, plus deployment support.
• Ensure adherence to enterprise standards and change processes.
• Support Agile and Waterfall methodologies across projects.

Skills

SDLC

Analytical skills

Troubleshooting

Production support

Cross-team collaboration

Agile & Waterfall

Education

Bachelor's degree in CS or related field

Tools

COBOL

CICS

JCL

IMS

VSAM

DB2

Job description

Pay Range: $59.00 – $66.00 per hour (based on experience and internal equity)

Schedule: Full-time, contract; long-term opportunity

Work Type: Hybrid (4 days onsite, 1 day remote)

Benefits: Health, Vision, Dental, Life Insurance, 401k, Continuing and on-demand education

Must be willing to work onsite in Torrance, CA (LA County)

Sponsorship is available for this role

Position Summary

We are seeking a Senior Mainframe Developer to support enterprise Parts Applications and Supply Chain systems within a large-scale automotive environment. This role will serve as the Mainframe Systems Subject Matter Expert (SME), leading analysis, design, development, testing, implementation, and production support for mission‑critical applications while partnering with project managers, business stakeholders, and development teams.

The ideal candidate brings deep expertise in COBOL-based mainframe development, enterprise architecture, SDLC methodologies, and production support, along with the ability to deliver scalable solutions supporting high-volume automotive parts and logistics operations.

Key Responsibilities

• Serve as the Mainframe Systems SME supporting enterprise Parts Applications and Supply Chain initiatives
• Analyze business requirements and translate them into technical solutions and development tasks
• Lead functional analysis, detailed design, development, testing, implementation, and production support activities
• Design, develop, and maintain enterprise mainframe applications using COBOL, CICS, JCL, IMS, VSAM, and DB2
• Define architectural solutions that support scalability, maintainability, and business requirements
• Support projects ranging from large enhancements to enterprise-wide application initiatives
• Perform unit testing, integration testing, system testing, user acceptance testing (UAT), implementation, and post‑production warranty support
• Collaborate with Project Managers, Business Analysts, Architects, QA teams, and business stakeholders throughout the SDLC
• Provide regular project status updates, risk identification, and technical recommendationsTroubleshoot production issues and support ongoing application maintenance
• Ensure adherence to enterprise development standards, architecture guidelines, and change management processes
• Support Agile and Waterfall software development methodologies
• Contribute to solution architecture discussions and enterprise technology planning

What You’ll Be Working On

• Enterprise Supply Chain and Warehousing applications
• Mainframe application development and modernization
• Production support and system enhancements
• Business requirements analysis and solution design
• Mainframe architecture and application integration
• Mission‑critical automotive business systems

Required Skills & Experience

• Bachelor's degree in Computer Science, Information Systems, or related field (or equivalent experience)
• Advanced expertise with COBOL, CICS, JCL, IMS, VSAM, and DB2
• Strong understanding of Software Development Life Cycle (SDLC)
• Experience performing business analysis, functional design, development, testing, implementation, and production support
• Strong analytical, troubleshooting, and problem‑solving skills
• Experience supporting mission‑critical production systems
• Ability to collaborate effectively across technical and business teams
• Experience working within Agile and Waterfall environments
• Stable work history within large enterprise organizations

Desired Skills

• Experience with .NET Core, ASP.NET MVC, C#, or Angular
• Knowledge of Automotive Parts, Supply Chain, Warehousing, or Logistics systems
• Understanding of enterprise architecture, multi‑tier applications, and cross‑platform environments
• Experience with emerging technology standards and enterprise modernization initiatives
• Strong communication and stakeholder management skills
• Experience supporting medium‑to‑large enterprise software implementations
• 3+ years of Big 4 consulting experience preferred