Application Development AS400 Developer

About the Company
The Office of Management and Enterprise Services (OMES) is a centralized state government agency responsible for providing a wide range of shared business and administrative services to support Oklahoma state agencies. Its core operations include enterprise information technology services, procurement, facilities management, human capital management, finance and accounting, and fleet management. OMES plays a key role in coordinating with other state entities, such as the Oklahoma Insurance Department, to deliver technology solutions and application services. The agency is committed to operational excellence, efficient use of public resources, and enabling effective government operations through reliable enterprise services.

Key Responsibilities
Maintain, modify, and optimize custom legacy application code written in RPG, RPG III, RPG IV (ILE RPG), RPGLE, and Control Language (CL)
Investigate and troubleshoot operational bugs, batch run anomalies, and user-reported system issues
Update existing logic to adapt to regulatory changes, licensing requirements, and agency business process updates
Serve as the primary technical point of contact to coordinate with the hosting provider for system maintenance, OS patching schedules, database utilities, and environmental adjustments
Manage application-level security configurations, including user profiles, object-level authority, and verify system audit logs (QAUDJRN) to maintain system integrity
Manage local job queues, active subsystems, and application-level job schedulers
Coordinate with storage and backup operations teams to ensure application backup windows, disaster recovery testing, and restoration verifications are carried out successfully
Query, manage, and tune DB2 for i databases, optimizing SQL queries and indexes to ensure database responsiveness
Support secure, automated file transfers (SFTP/FTP) and interfaces between the hosted AS400 partition and downstream state, regional, or partner systems
Cooperate with state database administrators and cloud architects to extract, clean, and archive legacy tables
Document system flows, database schemas, and interdependencies to facilitate a seamless transition of legacy business logic to modern cloud systems

Required Qualifications
5+ years of experience

Skills
RPGLE
Control Language (CL)
SQL on DB2 for i
SFTP/FTP File Transfer Automation
AS400 (IBM i, iSeries) Application Development and Support
IBM i Application Security Management
Legacy Application Maintenance
Application Administration
Hosting Provider Coordination
Disaster Recovery Coordination
Legacy System Modernization
Technical Documentation

Next Steps
Shortlisted candidates will receive an email from with instructions to complete a required screening step. Completion of this screening is mandatory to be considered for the role.If you do not receive this email after applying, please contact our Talent Expert at