AS400 Developer / Administrator – Contractor

Job Title: AS400 Developer/Admin (Contractor)
Location: Oklahoma City, OK (Hybrid options available)
Position Type: Contract
Contract Duration: 12-Month Initial Assignment (with high probability of 
extension)
Hours: 20 hours per week

Position Overview:
We are seeking an experienced, high-caliber 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.
Because the underlying AS/400 hardware partition, operating system, and baseline 
infrastructure are fully hosted and managed by an external provider, this position 
does not require hardware or OS-level systems engineering. Instead, the contractor 
will focus on application development, software support, database management, 
and serving as the technical liaison to Ensono for environment-level modifications.
Additionally, the contractor will play a key role in assisting state IT leadership with 
database extraction, documentation of legacy business logic, and support for 
ongoing cloud migration and data archiving initiatives.

Key Responsibilities:
1. Legacy Application Maintenance & Support
 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 userreported system issues.
 Update existing logic to adapt to regulatory changes, licensing requirements, and
agency business process updates.
2. Application Administration & Infrastructure Liaison
 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, objectlevel 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.
3. DB2 Database & Integration Management
 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.
4. Modernization & Migration Enablement
 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 Skills & Qualifications:
 Experience: Minimum of five (5) years of hands-on experience in AS400 (IBM i, 
iSeries) application development and support.
 Programming Skills: Exceptional proficiency in RPG IV (ILE RPG), RPGLE, CL, 
and SQL on DB2 for i.
 Hosting Coordination: Prior experience working in a hosted/managed AS400 
environment, collaborating with external hosting providers (such as Ensono) to 
resolve infrastructure or environmental issues.
 Application Administration: Proven experience in IBM i work management, 
subsystem coordination, application security, and user profile management.
 Data Integration: Strong background in file transfer automation (FTP, SFTP) 
and managing external integrations.

Highly Valued Skills (Nice-to-Haves):
 Direct experience assisting in legacy-to-cloud migrations or data warehousing 
extractions.
 Familiarity with modern IBM i tools, such as Rational Developer for i (RDi).
 Prior experience working in public sector environments or supporting insurance
regulatory systems.

Work Environment and Terms::
 This role is structured as a contract engagement. Candidates must be local to 
Oklahoma City or willing to relocate, as hybrid schedules require designated onsite days at Oklahoma.
 Candidates must pass a comprehensive background check as required by State 
of Oklahoma IT security standards.