Mainframe Systems Programmer: CICS & WAS Specialist

Ensono; Downers Grove (IL); On-site; USD 120,000 - 150,000; Full time

Job summary

Ensono is seeking a Mainframe Systems Programmer to support mainframe z/OS, CICS TS, and WAS environments. The role focuses on installing, testing, and maintaining system software, with strong emphasis on problem resolution and performance tuning.

Responsibilities include 24/7 support, OS upgrades, customer migrations, and disaster recovery coordination. The ideal candidate will have deep knowledge of z/OS components and related OEM products, providing expert guidance across teams.

Qualifications

• Experience with mainframe z/OS environments and related tools.
• Knowledge of CICS TS and WebSphere Application Server (WAS).
• Ability to install, test, and implement operating system and system software.

Responsibilities

• Fulfill CSOs for mainframe z/OS customers (CICS TS and related OEM software).
• Provide primary support for reported problems related to CICS TS / WAS and OEM software products.
• Provide 24 x 7 x 365 support across multiple time zones.
• Follow procedures for installing OEM software products per best practices and Ensono standards.
• Coordinate with other towers to prepare customer partitions for annual OS upgrade checks.
• Support customer migrations for new transitions involving CICS TS and OEM products.
• Assist migration of newly acquired customers to resolve technical hurdles promptly.
• Collaborate with Disaster Recovery Services on DR plans for customers.
• Adhere to schedules to manage resources and timely implementations.
• Follow ITSM change control procedures including fixes and upgrades to z/OS products.

Skills

Mainframe z/OS

CICS TS

WAS

System software maintenance

Problem solving

Tools

Tape management

Scheduling

Security

Monitoring systems

Job description

Ensono is seeking a Mainframe Systems Programmer to support mainframe z/OS, CICS TS, and WAS environments. The role focuses on installing, testing, and maintaining system software, with strong emphasis on problem resolution and performance tuning.

Responsibilities include 24/7 support, OS upgrades, customer migrations, and disaster recovery coordination. The ideal candidate will have deep knowledge of z/OS components and related OEM products, providing expert guidance across teams.