Description Please note, this is a hybrid position requiring 8 days per month on-site in Alpharetta, GA. Welcome to Publix Technology, the award-winning technical group for Publix Super Markets, Inc., the largest employee-owned company in the nation. Our technology teams of 2100+ associates provide cutting-edge, modern solutions to nearly 1400 retail stores and 200,000+ internal team members across 8 states. We offer positions at all levels - summer internships, individual contributor roles, to technical leadership across a broad range of technical disciplines. So, whether you are interested in IT security, platform engineering, architecture, software development, or infrastructure - we have a career path for you! Pub Subs are not the only thing we build from scratch. See for yourself why Publix Super Markets, Inc. has been on Fortune's 100 Best Companies to Work For list. Join the Host Engineering team as a Principal Systems Engineer - Mainframe. This team is responsible for playing a key role in supporting enterprise system software that runs our mainframe platform. Responsibilities: * Lead system software upgrades. * Primarily responsible for CICS Transaction Server and related products (perform upgrades, configuration, troubleshooting and administration tasks) * Serve as Engineer for other system software products (i.e., CA-Broadcom products, such as OPS/MVS Automation, CA View/Deliver, CA Sysview, etc.) * Work with RACF Security Engineer to secure assigned software products. * Assist with overall system performance monitoring/tuning. * Assist application teams with problem resolution. Additional Information Your application may have additional steps that you will need to complete in order to remain eligible for consideration. Please be sure to monitor your email, including your spam folder, on a daily basis for critical, time-sensitive emails that could require action within 24-48 hours. Please do not use your Publix email address when applying. Once your application has been successfully submitted you will receive a confirmation email. * Relocation/Household Good Shipment Allowance will NOT be provided.* Required Qualifications * Bachelor's degree in management information systems, Computer Science, Business, or other analytical disciplines or equivalent experience * 6+ years of experience as a Mainframe Systems Engineer * Ability to perform IBM ServerPac or z/OSMF upgrades of major subsystems in a z/OS environment. * 6+ years of experience using IBM SMP/E to install and upgrade IBM and ISV products in a z/OS environment. * Expert level knowledge of configuring/administrating and supporting CICS Transaction Server * Expert level understanding and experience with IBM z/OS, JCL, and Utilities Preferred Qualifications * Installation and customization experience with Broadcom-CA products, such as OPS/MVS Automation, CA Gen, CA View/Deliver, CA DADS, etc. * Experience supporting MacKinney products such as Xray, Track, Batch to CICS, etc. * Experience supporting ASG/Rocket TMON * Detailed understanding of RACF security and certificates * Experience supporting DB2 system needs (memory management, performance monitoring/tuning, etc.) * Ability to perform dump analysis. * Knowledge in Assembler, CLIST and/or REXX