Senior Mainframe z/OS Systems Architect

R Systems; Singapore; On-site; SGD 120,000 - 180,000; Full time

Job summary

R Systems is seeking a seasoned Mainframe zOS System Programmer / Administrator to join our enterprise infrastructure team in Singapore. You will oversee zSeries hardware, zOS, CICS and MQ environments, and lead infrastructure initiatives with a strong emphasis on stability and performance.

Responsibilities include designing the host platform strategy, driving architecture roadmaps, and delivering L3 support across IBM and third-party software stacks for financial institutions.

Qualifications

• Over 6 years of experience, particularly within financial institutions.
• Domain knowledge in Mainframe System Administration and operating systems (TSO, JES2, ISPF, RACF).

Responsibilities

• Leading infrastructure initiatives and project management.
• Deploying and supporting host infrastructure solutions with L3 expertise.
• Managing risks, controls, audits, and RCSA for host platforms.
• Designing and maintaining host platform technology strategy, architecture, and roadmap.

Skills

Mainframe CICS & MQ

zSeries hardware & zOS

IBM & 3rd party vendor system software

Storage area networks

Roadmap architecture

Infrastructure leadership

L3 support

Risk, controls, audits, RCSA

Mainframe system administration

TSO/JES2/ISPF/RACF

Job description

R Systems is seeking a seasoned Mainframe zOS System Programmer / Administrator to join our enterprise infrastructure team in Singapore. You will oversee zSeries hardware, zOS, CICS and MQ environments, and lead infrastructure initiatives with a strong emphasis on stability and performance.

Responsibilities include designing the host platform strategy, driving architecture roadmaps, and delivering L3 support across IBM and third-party software stacks for financial institutions.