Senior Mainframe Architect - z​/OS, DR & Performance Expert

Job Description:

• Excellent understanding of System z architecture

• Excellent experience with z/OS version upgrades (Advantage if experience 3.2 upgrade or above)

• JES2/JES3 migration experience

• Experience in building Mainframe LPAR and OS Upgrades

• Knowledge Catalog management, IBM system utilities

• Knowledge on VTAM, TCPIP, ACF2 and GDPS

• Installation of patches and fixes

• Installation and maintenance of ISV products, REXX, RMF, SMF

• Installation and customization of z/OS and related IBM or other ISV software;

• Extensive experience with providing performance and tuning using monitoring tools (f. ex. z/OS Performance Monitor or other tools);

• DIRMAINT administration – RACF/Top secret/ACF2 administration;

• REXX knowledge - SSI knowledge;

• Ability to support network configuration and maintenance (Real TCP/IP stack, VSWITCH, TCPIP tools in z/OS, etc.);

• Solid skills in z/Linux system cloning and configuration including memory and file system allocation;

• System parameters/parmlib maintenance

• Managing incidents on z/OS related issues

• z/OS performance monitoring and reporting

• Capable of planning and supporting Disaster recovery exercises

• Performance tuning & Development of operational procedures

• Experience with system indicators (logs, dumps, error) logs for pro-active management of system problems

• Installation and maintenance of ISV products (For z/OS)

• Ability to work with Developers in fixing issues

• Extremely familiar with IBM z/OS Upgrade

• Experience in Coordinating with Vendor to complete the upgrades

• Planning, installation, customization of z/Linux and guest operating system

• Ability to perform dump and restore of system data.

• Responsible for tolerating PTF maintenance for ISV products
Access management - onboarding and access provisioning

Key Responsibilities:

• Incident Management / Problem Management by performing problem analysis and resolution implementation

• Support maintenance release and major OS upgrades.

• Process client requests for system software modifications

• Review system indicators (logs, dumps, error) logs for pro-active management of system problems

• Work with operations to monitor, maintain and IPL systems to improve consistency and availability

• Monitor / Tune system performance and work with performance engineering and capacity teams

• Ensure availability and performance objectives, as required by clients and management, are maintained for operating systems and for system software components

• Implement appropriate tools and processes to automate repeated tasks

• Manage various license codes for infrastructure software.

• Capable of planning and supporting Disaster recovery exercises

• Performance tuning & Development of operational procedures

• Implement changes as needed to support other towers and day-to-day operations.

• Work with IBM and other Independent Software Vendors on a regular basis

• Provide regular management reports / analysis to senior management team regarding Incidents, Changes and requests