Systems Administrator: III (Senior)

Our client is seeking an experienced IBMi (AS/400) Systems Engineer/Administrator to support, maintain, and enhance their enterprise IBMi environment. This role is responsible for day-to-day system operations, hardware and software maintenance, performance monitoring, troubleshooting, and on-call support as needed. The ideal candidate will have strong technical expertise in IBMi systems and a proactive approach to reliability, security, and operational excellence. Team Culture/ Work Environment:

• Fast paced
• A lot of information at first
• The work is very critical
• Once the training is done, work will be pretty cushy

Key Projects:

• Picking up the extra work, * Daily Operations & Maintenance

o Monitor and maintain IBMi (OS/400, i5/OS) systems to ensure optimal performance and uptime. o Perform system health checks, job monitoring, subsystem management, and system message handling. o Apply PTFs, firmware updates, and OS upgrades in coordination with change management processes. o Manage user profiles, system security, and resource allocation. o Perform routine storage, tape, and backup/restore operations.

• System Support & Troubleshooting

o Diagnose and resolve issues related to IBMi hardware, OS, and system components. o Analyze system logs, performance data, and job errors to identify root causes. o Coordinate with hardware vendors for repair, replacement, and preventative maintenance.

• Backup & Recovery

o Support and enhance backup, archival, and disaster recovery processes. o Work with established tools (e.g., TSM, Cohesity) to improve data protection strategies.

• On Call Support, POSITION SUMMARY The Senior Systems Administrator is responsible for the administration, implementation, and ongoing maintenance of the organization’s server and network infrastr…
• 14 days ago +

• Strong analytical and problem solving abilities.
• Effective communication skills with technical and non technical stakeholders.
• Ability to work independently as well as collaboratively within an operations team.
• Flexibility and willingness to provide after-hours support during critical incidents or maintenance windows. *

Technology Requirements:

• Strong knowledge of OS/400, CL commands, system administration, and hardware maintenance.
• Experience with system operations including job scheduling, BRMS or backup utilities, and system monitoring.
• Understanding of IBMi security, user provisioning, authority management, and auditing.
• Ability to troubleshoot system, job, performance, and operational issues independently.

Strong documentation habits and familiarity with change management processes Degree or Certification required?

• No

Years of Experience?

• 3-5+ years of experience supporting IBMi / AS/400 / iSeries environments.

Nice-to-Have Skills:

• Experience with Cohesity, TSM (Tivoli Storage Manager), or other enterprise backup solutions.
• Exposure to enterprise storage systems (SAN/NAS, IBM Power storage, etc.).
• Knowledge of ACBS (Advanced Commercial Banking System) - significant plus.
• Familiarity with HA/DR solutions like PowerHA, MIMIX, or Robot HA.
• Experience with automation tools such as Robot Schedule, HelpSystems, or similar.
• Knowledge of network concepts related to IBMi (TCP/IP, FTP, ODBC, etc.).

Leidos

• Denver, CO
• $92,300-166,850 per year Description Unleash Your Potential At Leidos, we deliver innovative solutions through the efforts of our diverse and talented people who are dedicated to our customer’s success…, + Aurora, CO, + $92,300-166,850 per year Description Unleash Your Potential At Leidos, we deliver innovative solutions through the efforts of our diverse and talented people who are dedicated to our customer’s success…