Mainframe z/OS System Programmer

Mainframe Z/OS System ProgrammeA leading enterprise technology organization is seeking a Mainframe z/OS System Programme to join its infrastructure team in Phoenix, Arizona. This is a full-time hybrid position requiring onsite attendance three days per week. The environment includes IBM z/OS, RACF, JES2/JES3, REXX, NetView, DB2, CICS, IMS, MQ, and enterprise scheduling and automation platforms. This position offers an opportunity to support highly available enterprise systems that power critical business operations. The successful candidate will work across operating system administration, performance optimization, automation, security, and infrastructure modernization efforts. Ideal candidates enjoy solving complex technical problems, driving platform stability, and working within large-scale enterprise computing environments.Required Skills & ExperienceExperience administering IBM z/OS environmentsStrong understanding of JES2/JES3Experience with TSO/E, ISPF, and USSKnowledge of RACF administration and security conceptsSystem performance analysis using RMF, SMF, and SDSFExperience with operating system upgrades and maintenanceRoot cause analysis and production troubleshooting experienceExperience supporting enterprise change management processesAutomation experience with REXX, CLIST, NetView, or SA z/OSDesired Skills & ExperienceExperience supporting DB2, CICS, IMS, or MQ environmentsCapacity planning and performance engineering experienceServiceNow experienceDisaster recovery planning and testing experienceMainframe modernization project exposureWhat You Will Be DoingMaintain and optimize IBM z/OS operating environmentsImplement upgrades, patches, and system enhancementsMonitor platform health and tune system performanceSupport security and compliance initiativesDevelop and maintain automation solutionsInvestigate and resolve infrastructure incidentsParticipate in maintenance and deployment activitiesCreate and maintain operational documentationTech Breakdown40% IBM z/OS Administration25% Performance & Capacity Management20% Automation & Tooling15% Security, Compliance & Change ManagementDaily Responsibilities75% Hands-on Technical Work5% Leadership / Mentorship20% Team CollaborationThe OfferCompetitive base salaryPotential annual bonus eligibilityEnterprise-level technical growth opportunitiesBenefitsMedical, Dental, VisionVacation Time401(k)Life InsuranceDisability CoverageApplicants must be currently authorized to work in the U.S. on a full-time basis now and in the future.