Hybrid- IBM i/AS400 iSeries Performance Engineer

Hybrid- IBM i / AS400 (iSeries) Peformance Engineer - Colchester, VT 

• 6 month assignment starting in June 2026 
• 40 hours 
• This is a Hybrid role. Candidates need to live within commuting distance of Colchester, VT to travel onsite when needed. 

Summary

• We are seeking an experienced IBM i / AS400 (iSeries) Performance Engineer to provide advanced performance analysis, optimization, and operational support for critical IBM i environments. This role requires a hands-on specialist who can proactively identify performance bottlenecks, analyze system resource utilization, make optimization recommendations, and lead remediation efforts across production environments.
• The ideal candidate will possess deep expertise with IBM i performance analysis tools and have a proven track record of improving system performance, capacity utilization, application responsiveness, and overall system stability.

Key Responsibilities

• Analyze and troubleshoot IBM i performance bottlenecks across CPU, memory, disk, database, jobs, subsystems, and workloads.
• Perform capacity planning and provide recommendations for system optimization and resource utilization.
• Utilize IBM i performance analysis tools such as GIAPA, Job Watcher, Robot Monitor, Performance Data Investigator (PDI), Collection Services, Navigator for i, iDoctor, and related monitoring tools.
• Lead performance remediation efforts and collaborate with application teams to resolve performance-related issues.
• Conduct performance trend analysis and develop proactive recommendations to improve system stability and scalability.
• Provide day-to-day support and administration of IBM i (AS400) systems.
• Execute system maintenance, including PTFs, upgrades, and patch management.
• Manage backup and recovery processes, ensuring data integrity and availability.
• Troubleshoot and resolve system, job, application, and performance issues.
• Administer user profiles, security settings, and access controls.
• Support batch processing, job scheduling, and job queue management.
• Collaborate with application teams to support deployments and changes.
• Maintain documentation, runbooks, operational procedures, and performance analysis reports.
• Ensure compliance with security policies and audit requirements.

Required Qualifications

• 5+ years of experience supporting IBM i / AS400 environments.
• Strong knowledge of IBM i OS (OS/400), CL commands, job control, and system administration.
• 5+ years of hands-on IBM i performance engineering experience, including performance analysis, bottleneck identification, capacity planning, and remediation.
• Demonstrated experience using IBM i performance analysis and monitoring tools such as GIAPA, Job Watcher, Robot Monitor, Collection Services, Performance Data Investigator (PDI), Navigator for i, iDoctor, or similar tools.
• Ability to independently analyze performance data, identify root causes of system slowdowns, and implement optimization recommendations.
• Experience with system monitoring, troubleshooting, and production support.
• Familiarity with backup and recovery solutions such as BRMS.
• Understanding of IBM i security administration and user management.

Preferred Qualifications

• Experience with IBM Power Systems hardware.
• Knowledge of DB2 for i, including database administration and query performance tuning.
• Experience with high availability and disaster recovery solutions such as MIMIX or PowerHA.
• Exposure to integration with modern platforms including Windows, Linux, APIs, and web services.
• Experience supporting large-scale, mission-critical production environments.

Ideal Candidate

• Proven IBM i performance engineering expertise with the ability to immediately assess and remediate performance issues.
• Strong analytical and troubleshooting skills with experience translating performance metrics into actionable recommendations.
• Comfortable leading performance optimization initiatives in mission-critical environments.
• Hands-on operational mindset with strong problem-solving abilities.
• Able to work independently with minimal ramp-up time while collaborating effectively across cross-functional teams.

Additional Information

• All candidates are encouraged to apply, but many positions require a strict drug and background check by our customers.
• F2OnSite supports and adheres to all state laws regarding background checks.