Company Overview A leading Australian financial services organisation, renowned for career development opportunities, is experiencing rapid growth and are looking for a Principal Infrastructure Specialist to join their team Role Overview This role will lead the support and enhancement of mainframe integration and middleware platforms. You'll play a critical part in enabling modern digital applications by securely exposing core mainframe services via z/OS Connect and WebSphere Application Server (WAS / Liberty). Key Responsibilities Configure, maintain, and support z/OS Connect server instances, including connection profiles and security settings Deploy and support REST APIs exposing CICS, IMS, and DB2 services Troubleshoot integration issues such as data conversion, special character handling, and ASCII/EBCDIC mismatches Monitor API performance and optimise throughput using SMF data and Splunk analytics Install, configure, and maintain WAS and WAS Liberty environments Manage application deployments including EAR/WAR packaging, JVM tuning, and environment configuration Troubleshoot connectivity issues between WAS, MQ, DB2, and z/OS Connect. Key Skills & Experience Strong hands-on experience with z/OS Connect and/or WAS Liberty Solid understanding of mainframe environments Experience with JCL, TSO/ISPF, and Unix System Services (USS) Awareness of RACF / ACF2 security concepts Strong troubleshooting skills across middleware and integration layers Experience working in large enterprise or regulated environments Splunk for monitoring and analytics SMPE experience Exposure to API performance tuning and capacity management Experience supporting high-availability, mission-critical platforms What’s on Offer Opportunity to work on enterprise-scale, business-critical platforms Exposure to modern API enablement of mainframe systems Collaborative environment with strong technical depth Click on the ‘APPLY’ button or email jonny.jameson@profusiongroup.com We are committed to providing a supportive culture and positively contributing towards creating diverse and inclusive workplaces for our candidates & clients. We invite candidates of all ages, genders, sexual orientation, cultural backgrounds, people with disability, neurodiverse individuals, and Indigenous Australians to apply.
