Senior Mainframe CICS Support Engineer - z/OS & DB2

Infosight Consulting Limited; Hong Kong Island; On-site; HKD 900,000 - 1,300,000; Full time

Job summary

Infosight Consulting Limited seeks an experienced IBM Z/CICS support specialist for our Hong Kong team. You will install, configure and maintain CICS TS for z/OS and related tools, ensuring performance, security and reliability across production systems.

The role requires 10+ years of mainframe experience, strong problem-determination skills, and English proficiency; Cantonese preferred for local collaboration. Rotation maintenance windows apply.

Qualifications

• University degree in Computer Science, Information Technology or related discipline.
• Strong proficiency in IBM Z mainframe system and middleware technologies incl. CICS, z/OS, DB2 and MQ.
• Hands-on experience with product installation, customization and maintenance of CICS TS for z/OS and related CICS tools.
• Knowledge of RACF security tools and performance monitoring using Omegamon, CICS Performance Analyzer, RMF and SMF.
• Excellent problem determination skills, able to detect, investigate and control processing anomalies.
• English required; Cantonese preferred for local team communication; Mandarin beneficial.
• Sound analytical, communication and interpersonal skills; able to work in an agile, multicultural environment.
• No regular shift; rotational maintenance support; Sunday 00:00–06:00 windows approx every 2 weeks.

Responsibilities

• Handle installation, customization and maintenance of IBM Z products and tools (CICS TS, z/OS Connect EE, CAFC, CICS JVM, CICS Performance Analyzer, CICS Configuration Manager).
• Manage system performance, reliability and availability against SLAs using Omegamon, CICS Performance Analyzer, RMF, SMF, Splunk and AppDynamics.
• Resolve incidents with root-cause analysis across managed systems.
• Collaborate with global application teams to deliver projects and platform standardisation.
• Provide operations support including on-call and after-hours during maintenance windows.
• Automate operational processes, CI/CD pipelines, system changes, monitoring and capacity planning.
• Ensure compliance with security standards and operational risk requirements.
• Develop and maintain disaster recovery plans and documentation.

Skills

IBM Z mainframe

CICS

z/OS

DB2

MQ

RACF

Omegamon

RMF

SMF

DevOps

CI/CD

Ansible

Jenkins

GitHub

REXX

Root-cause analysis

Education

Bachelor's degree in Computer Science / IT

Tools

z/OS Connect EE

CAFC

CICS JVM

CICS TS

z/OS

RACF

Job description

Infosight Consulting Limited seeks an experienced IBM Z/CICS support specialist for our Hong Kong team. You will install, configure and maintain CICS TS for z/OS and related tools, ensuring performance, security and reliability across production systems.

The role requires 10+ years of mainframe experience, strong problem-determination skills, and English proficiency; Cantonese preferred for local collaboration. Rotation maintenance windows apply.