Senior COBOL Applications Developer - Mainframe On-Site

okgov; Oklahoma; On-site; USD 65,000 - 90,000; Full time

Benefits offered by this job

Benefits package

Job summary

The Oklahoma Employment Security Commission (OESC) seeks an Applications Developer to support and enhance its core unemployment benefits processing systems. You will design, test, and implement COBOL solutions within a BULL mainframe GCOS8 environment, with Linux tools and Cloud familiarity helping modernize workflows.

The role requires on-site presence in Oklahoma City, with standard M-F hours and an emphasis on accurate coding, documentation, and collaboration with business analysts and

Qualifications

• Knowledge of COBOL and mainframe environments.
• Experience with BULL GCOS8 and Linux command‑line tools.
• Ability to translate legislative updates into technical logic.

Responsibilities

• Design, develop, test, and implement COBOL solutions within a mainframe environment.
• Provide on‑call support and ensure continuity of critical processing systems.
• Troubleshoot, analyze, and maintain applications and databases.
• Collaborate with analysts and stakeholders to evaluate needs and deliver solutions.
• Navigate Linux file systems, scripts, and data transfers between systems.
• Maintain documentation for code and legacy processes.

Skills

Problem solving

Critical thinking

Attention to detail

Verbal communication

Tools

BULL mainframe

GCOS8

Linux

LIBER8

Job description

The Oklahoma Employment Security Commission (OESC) seeks an Applications Developer to support and enhance its core unemployment benefits processing systems. You will design, test, and implement COBOL solutions within a BULL mainframe GCOS8 environment, with Linux tools and Cloud familiarity helping modernize workflows.

The role requires on-site presence in Oklahoma City, with standard M-F hours and an emphasis on accurate coding, documentation, and collaboration with business analysts and