Mainframe Z/OS Administrator Lead

UST is looking for a z/OS Systems Engineer to support and enhance our enterprise platform. This role focuses on z/OS administration, CICS management, security and encryption (TLS/ICSF), and ensuring reliable, secure, and efficient operations. The ideal candidate brings strong z/OS expertise and the ability to work across evolving, cloud-integrated environments.

Key Responsibilities

• Provide day-to-day support and administration of the z/OS operating system and related subsystems.
• Manage, configure, and troubleshoot CICS regions, resources, and runtime environments.
• Implement and support TLS and enterprise encryption capabilities across z/OS components.
• Support and manage ICSF (Integrated Cryptographic Service Facility), including key lifecycle and cryptographic operations.
• Monitor system performance and proactively resolve issues to maintain high availability and reliability.
• Participate in system upgrades, patching, and maintenance activities.
• Analyze system logs, dumps, and diagnostics to resolve complex technical issues.
• Collaborate with application, security, cloud, and infrastructure teams in a hybrid (z/OS + cloud) environment.
• Ensure adherence to configuration standards, documentation, and operational best practices.
• Contribute to disaster recovery planning, testing, and operational readiness.

Required Qualifications

• 5–8 years of hands-on experience supporting z/OS systems in a production environment
• Strong knowledge of CICS configuration, performance tuning, and troubleshooting
• Experience with TLS, encryption protocols, and secure communications on z/OS
• Hands-on experience with ICSF, cryptographic services, and key management
• Experience maintaining and monitoring tools such as BMC MainView, BMC Datastream, Dynatrace, or similar platforms
• Strong diagnostic and problem-solving skills using system logs, dumps, and IBM tools
• Ability to work effectively in a fast-paced, hybrid technology environment and manage multiple priorities
• Strong communication and collaboration skills

Preferred Qualifications

• Experience with JES2, VTAM, TCP/IP stack configuration, or related subsystems
• Familiarity with RACF or other enterprise security tools
• Experience with SMP/E, system upgrades, and maintenance processes
• Knowledge of automation tools such as REXX, z/OS scripting, or orchestration frameworks
• Experience with DevOps tooling (e.g., Ansible, Git, Jenkins) in hybrid environments
• Experience supporting USS, Java, and Python runtime environments on z/OS
• Exposure to hybrid integration patterns between z/OS and cloud platforms
• Experience working in large enterprise or regulated environments