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AS400 Developer​/Admin

Job in Oklahoma City, Oklahoma County, Oklahoma, 73116, USA
Listing for: NRI, Inc.
Full Time, Part Time position
Listed on 2026-09-15
Job specializations:
  • IT/Tech
    Database Administrator, Systems Administrator
Salary/Wage Range or Industry Benchmark: 40 - 60 USD Hourly USD 40.00 60.00 HOUR
Job Description & How to Apply Below

We are seeking an experienced AS400 Developer/Admin for a long-term contract opportunity supporting a core IBM AS/400 (IBM i/iSeries) environment. This position will be responsible for legacy application development and maintenance, database management, application administration, troubleshooting, system integrations, and modernization initiatives. The ideal candidate will have strong hands-on experience with RPGLE/RPG IV, CL/CLLE, SQL, DB2 for i, and FTP/SFTP
, along with experience in IBM i system administration and work management.

Responsibilities
  • Maintain, modify, troubleshoot, and optimize legacy applications developed in RPG, RPG III, RPG IV/ILE RPG, RPGLE, and CL.
  • Investigate application issues, operational bugs, batch-processing problems, and user-reported system issues.
  • Modify existing application logic to support regulatory requirements, licensing changes, and business-process updates.
  • Coordinate with external hosting providers regarding system maintenance, OS patching, database utilities, and environmental changes.
  • Manage application-level security, including user profiles and object-level authority.
  • Review system audit information, including QAUDJRN, to help maintain system integrity.
  • Manage job queues, active subsystems, and application-level job scheduling.
  • Coordinate with storage and backup teams regarding application backup windows, disaster recovery testing, and restoration verification.
  • Query, manage, and optimize DB2 for i databases.
  • Tune SQL queries and indexes to improve database performance.
  • Support automated and secure FTP/SFTP file transfers.
  • Maintain interfaces between the AS400 environment and state, regional, or partner systems.
  • Work with database administrators and cloud architects to extract, clean, and archive legacy data.
  • Document application flows, database structures, system dependencies, and integrations.
  • Assist with transitioning legacy business processes and applications to modern, cloud-based environments.

Schedule: Hybrid, approximately 20 hours per week

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