A well-established enterprise organization is seeking a Mainframe CICS System Administrator to join its infrastructure operations team in the Phoenix, Arizona area. This is a full-time hybrid position requiring onsite attendance three days per week. The environment includes IBM CICS Transaction Server, z/OS platforms, enterprise monitoring tools, and large-scale transaction processing systems that support critical business functions.
This opportunity is ideal for an experienced mainframe professional who enjoys solving complex technical issues, improving system performance, and maintaining highly available environments. The organization is investing in modernization initiatives while continuing to support critical legacy infrastructure, providing exposure to both operational excellence and long-term transformation efforts. The successful candidate will work alongside experienced infrastructure professionals and contribute directly to platform reliability and performance.
Required Skills & Experience
5+ years of experience supporting IBM mainframe environments
Hands-on CICS Transaction Server (CICS TS) administration experience
Experience applying PTFs and supporting software maintenance activities
Knowledge of production, testing, and disaster recovery environments
Experience monitoring system health and resource utilization
Strong troubleshooting and root-cause analysis abilities
Understanding of transaction processing systems
Experience managing system configurations and startup parameters
Desired Skills & Experience
OMEGAMON experience
MainView experience
TMON experience
Performance tuning and optimization expertise
Capacity planning experience
Disaster recovery testing and support
Experience working within large enterprise environments
Exposure to mainframe modernization initiatives
What You Will Be Doing
Install, configure, and support CICS Transaction Server environments
Apply maintenance, upgrades, and software updates
Administer production, testing, and disaster recovery regions
Monitor platform performance and system availability
Analyze CPU consumption, storage utilization, and transaction metrics
Perform tuning activities to improve overall system efficiency
Troubleshoot infrastructure and platform issues
Partner with engineering, operations, and support teams
Tech Breakdown
60% CICS Administration & Maintenance
25% Performance Monitoring & Optimization
15% Infrastructure Support & Collaboration
Daily Responsibilities
75% Hands-on Technical Administration
10% Documentation, Planning & Process Improvement
15% Team Collaboration & Project Work
Numbers & Facts
Location
Chandler, AZ
Skills
Analysis Skillsunmatched
Business Supportunmatched
CPU (Central Processing Unit)unmatched
Capacity Managementunmatched
Configuration Managementunmatched
Disaster Recoveryunmatched
Documentation Planunmatched
High Availabilityunmatched
IBM CICS (Customer Information Control System)unmatched
IBM Mainframeunmatched
IBM z-OS Operating Systemunmatched
Identify Issuesunmatched
Large-Scale Systemsunmatched
Mainframe Computerunmatched
Metricsunmatched
Operational Supportunmatched
Performance Analysisunmatched
Performance Managementunmatched
Performance Tuning/Optimizationunmatched
Problem Solving Skillsunmatched
Process Improvementunmatched
Resource Utilizationunmatched
Root Cause Analysisunmatched
Server Supportunmatched
Software Administrationunmatched
Software Upgradesunmatched
System Start-Upunmatched
Systems Administration/Managementunmatched
Transaction Processing/Managementunmatched
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