System Engineer

System Engineer Chicago, IL Onsite Need only local with real experience The Digital Technology team is comprised of many talented individuals all working together with cutting‑edge technology to build the best airline in the history of aviation. Our team designs, develops and maintains massively scaling technology solutions brought to life with innovative architectures, data analytics, and digital solutions. Job overview and responsibilities The Senior z/OS Systems Engineer provides critical support for IBM mainframe infrastructure, ensuring optimal performance and reliability of z/OS environments. This role combines hands‑on technical expertise in mainframe hardware and software with strong problem‑solving and collaboration skills across multiple support teams. System Operations & Maintenance Provides support for IBM mainframe hardware and software technologies Monitors daily operations of environment Installs, configures, and maintains IBM & ISV mainframe software Requires individual to be on the "on call" rotation - will be expected to work non‑business hours to resolve production problems and perform scheduled off‑hour activities Problem Resolution & Collaboration Analyzes and coordinates resolution of problems Interfaces with vendor support groups and other departments to ensure proper escalation and coordination towards problem resolution Interfaces with Storage Management, CICS Support, DB2 Support, IDMS Support, Capacity Planning, Operations, Coverage groups and applications staff as required Development & Testing Develops IBM mainframe solutions in support of applications development projects Performs acceptance testing of hardware and software solutions Documentation & Reporting Develops, publishes, and maintains documentation related to projects, hardware and software configuration and installation Prepares status reports and problem summaries as required Qualifications - External What's needed to succeed (Minimum Qualifications): Bachelor's degree 3+ years' experience with IBM mainframes Working knowledge of the following are required: Z/OS operating systems including JES2 IBM Assembler Language programming Parallel Sysplex clustering technology Unix System Services (USS) IPCS, SMP/E TCP/IP / OSA / VTAM WLM IBM Mainframe: z/OS and JES2 IBM Assembler, JAVA, Cobol, C, REXX Must be legally authorized to work in the United States for any employer without sponsorship Successful completion of interview required to meet job qualification Reliable, punctual attendance is an essential function of the position What will help you propel from the pack (Preferred Qualifications): 3-10 years' experience with IBM mainframes #J-18808-Ljbffr