AS/400 IBM Developer

About this role

Client: State of Oklahoma - Government Agency Job Title: AS400 Developer/Admin (Contractor) Term: 1-year contract - 20 hours a week Pay Rate: USD 50/Hr - USD 60/Hr Location: Oklahoma City, OK (Hybrid options available) must be local Work Authorization: USC or GC ONLY no other Visa considered Scope: Looking for a PT AS400 Developer/Admin for a long-term contract engagement. This critical resource will provide essential application maintenance, database management, and application-level administration services for OID’s core IBM AS/400 (IBM i Series) environment.

Experience: 5 years of hands-on experience in AS400 (IBM i, iSeries) application development and support. Exceptional proficiency in RPG IV (ILE RPG), RPGLE, CL, and SQL on DB2 for i. Prior experience working in a hosted/managed AS400 environment, collaborating with external hosting providers (such as Ensono) to resolve infrastructure or environmental issues. Proven experience in IBM i work management, subsystem coordination, application security, and user profile management.

Strong background in file transfer automation (FTP, SFTP) and managing external integrations. 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 Ensono’s 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.