AS400 Developer/Admin
AS400 Developer/Admin – ContractLocation: Oklahoma City, OKWork Arrangement: HybridPosition Type: ContractDuration: 12-month initial assignment with a strong possibility of extensionHours: 20 hours per weekPosition OverviewWe are seeking an experienced AS400 Developer/Admin (IBM i / iSeries) for a long-term contract opportunity supporting a critical legacy IBM i environment.The contractor will be responsible for application development and maintenance, database management, application-level administration, troubleshooting, data integration, and modernization/migration support.This role focuses on the application and database layer of the IBM i environment. Hardware, operating system, and baseline infrastructure are managed by an external hosting provider.Key ResponsibilitiesLegacy Application Maintenance & SupportMaintain, modify, and optimize legacy applications written in RPG, RPG III, RPG IV (ILE RPG), RPGLE, and CL.Troubleshoot application issues, batch processing anomalies, and user-reported problems.Modify existing application logic to support regulatory, licensing, and business process changes.Application AdministrationCoordinate with external hosting/infrastructure teams regarding system maintenance, database utilities, and environmental changes.Manage application-level security, including user profiles and object-level authority.Review system audit logs and support application integrity.Manage job queues, active subsystems, and application-level job scheduling.Coordinate application-related backup, disaster recovery, and restoration activities.DB2 Database & IntegrationQuery, manage, and tune DB2 for i databases.Optimize SQL queries and indexes for database performance.Support secure and automated SFTP/FTP file transfers.Manage integrations between the IBM i environment and external systems.Modernization & MigrationAssist with legacy database extraction, cleansing, archiving, and documentation.Document application flows, database schemas, dependencies, and legacy business logic.Support ongoing cloud migration and modernization initiatives.Required QualificationsMinimum 5+ years of hands-on AS400 / IBM i / iSeries development and support experience.Strong proficiency in:RPG IV / ILE RPGRPGLECL / CLLESQLDB2 for iExperience working in a hosted or managed IBM i environment.Experience with IBM i application administration, work management, subsystem coordination, and job scheduling.Experience with application security and user profile management.Strong knowledge of FTP/SFTP and external system integrations.Strong troubleshooting and problem-solving skills.Nice-to-Have SkillsExperience supporting legacy-to-cloud migration initiatives.Experience with data extraction, archiving, or data warehousing.Familiarity with Rational Developer for i (RDi).Previous experience supporting public-sector or insurance-related applications.Work Environment & RequirementsCandidates should be local to Oklahoma City, OK, or willing to relocate.Hybrid schedule with designated onsite days.Successful completion of a comprehensive background check is required.Interview ProcessOne 30-minute Microsoft Teams interview focused on technical and cultural fit.A second interview may be conducted for shortlisted candidates if required.Key Skills: AS400, IBM i, iSeries, RPGLE, RPG IV, ILE RPG, CL, CLLE, DB2, SQL, SFTP, FTP, IBM i Administration, AS400 Development, Legacy Application Support, Application Administration, Data Integration.