As400 (Administration) Infrastructure Manager

Espire Infolabs (Singapore) Pte Ltd; Singapore; On-site; SGD 80,000 - 110,000; Full time

Job summary

A leading IT infrastructure company in Singapore is seeking an experienced AS/400 Administrator. The role involves managing the full lifecycle of AS400 systems, ensuring optimal performance, and leading infrastructure projects. Candidates should have over 10 years of experience, a Bachelor's degree in computer science, strong leadership, and communication skills. Be prepared for after-hours work for deployment activities.

Qualifications

• Minimum 10 years of experience as an AS/400 Administrator or similar role.
• In-depth knowledge of IBM iSeries hardware and OS/400 operating system.
• Excellent communication and collaboration skills.

Responsibilities

• Develop and execute long-term infrastructure strategies for the iSeries environment.
• Manage the full lifecycle of AS400 systems and maintain optimal performance.
• Lead infrastructure projects like AS400 hardware refresh and migrations.

Skills

Problem-solving skills

Communication skills

Leadership skills

SQL knowledge

CL skills

Education

Bachelor’s degree in computer science or related field

Tools

IBM-MQ

IBM iSeries

WebSphere-MQ

CDC Replication

Robot products

Job description

Strategic Planning:

Develop and execute long-term infrastructure strategies for the iSeries environment.

System Oversight:

Manage the full lifecycle of AS400 systems—including hardware, software, storage, and network connectivity. Install, upgrade, and maintain IBMi-OS and related PTF software on the AS/400 system. Collaborate with application developers to ensure compatibility and optimal performance. Manage software like IBM-MQ, CDC Replication, Robot products and other software added to the servers.

Performance Monitoring:

Ensure optimal system performance, reliability, and availability through regular monitoring and tuning.

Security and Compliance:

Implement industry-standard security protocols and maintain compliance with relevant regulations.

Project Management:

Lead infrastructure projects such as AS400 hardware refresh, system upgrades, and migrations.

Cross-Team Collaboration:

Work closely with application teams, business users, project managers, and vendors.

Capacity Management:

Conduct regular capacity planning and system forecasting to support future growth.

Troubleshooting:

Identify and resolve system issues promptly, providing Tier 3 support when needed.

Disaster Recovery:

Maintain disaster recovery plans and oversee regular testing for AS400 systems.

Backup and Recovery:

Manage backup policies and ensure successful data recovery processes.

Vendor Relations:

Engage and manage vendors to ensure service quality and contract compliance.

Reporting:

Provide regular updates, KPIs, and performance metrics to management.

Team Leadership:

Mentor junior infrastructure staff and provide ongoing training and development.

Documentation:

Maintain accurate and up-to-date documentation of system configurations, procedures, and troubleshooting guides.

Requirements:

· Bachelor’s degree in computer science, Information Technology, or a related field (or equivalent experience).

· Minimum 10 years of experience as an AS/400 Administrator or in a similar role.

· In-depth knowledge of IBM iSeries hardware, OS/400 operating system, and associated software.

· IT processes, policies and procedures.

· Strong problem-solving and troubleshooting skills.

· Knowledge on iSeries application structure, operating system, installation specifications, troubleshooting, problem determination and data restoration techniques. Knowledge on IBM products like WebSphere-MQ, CDC & iCluster replication, BRMS, ROBOT scheduler and SKLM encryption Knowledge of security best practices and experience in implementing security measures.

· Excellent communication and collaboration skills.

· Good knowledge of SQL, CL, and MS Office Tools (including MS Access)

· Troubleshooting skills for data, application/system performance problems by utilizing tools like IBM idoctor, performance manager and Job watcher.

· Must be able to multitask and management of multiple initiatives when required.

· Willing to work when required.

· Mature and strong leadership skill to lead both technical and service operation management.

· Possess excellent communication skills; able to read, write and speak English.

· Must be willing and available to work after office hours, weekends for deployment activities and be on remote standby duty including occasional weekends when required.

Preferred Qualifications:

· Certification in IBM iSeries technologies or ITIL.

· Experience in regulated industries (e.g., finance, healthcare, manufacturing).

· Familiarity with hybrid/cloud environments involving iSeries integration.