Mainframe Z/OS Administrator Lead

UST; Pateros; Hybrid; PHP 1,200,000 - 1,800,000; Full time

Job summary

UST is seeking a Z/OS Systems Engineer to support and enhance our enterprise platform. The role focuses on z/OS administration, CICS management, TLS encryption, and secure, reliable operations in a hybrid z/OS + cloud environment.

The ideal candidate has 5–8 years of hands-on z/OS experience, strong CICS skills, and familiarity with ICTF, RACF-like security tools, and enterprise monitoring platforms. Collaboration across security, cloud, and infrastructure teams is essential.

Qualifications

• 5–8 years of hands-on z/OS production experience.
• Solid CICS configuration, performance tuning and troubleshooting.
• Experience with TLS, encryption and secure communications on z/OS.
• Hands-on with ICTF, cryptographic services and key management.
• Experience with monitoring tools such as MainView, Datastream, Dynatrace.
• Strong diagnostic skills using system logs, dumps and IBM tools.
• Able to work in a fast-paced hybrid z/OS + cloud environment.
• Excellent communication and collaboration skills.

Responsibilities

• Provide day-to-day z/OS admin and subsystem support.
• Manage and troubleshoot CICS regions and runtimes.
• Implement TLS and encryption across z/OS components.
• Manage ICTF including key lifecycle and crypto operations.
• Monitor performance and ensure high availability.
• Participate in upgrades, patching and maintenance.
• Analyze logs and diagnostics to resolve issues.
• Collaborate with security, cloud, and infrastructure teams in hybrid env.
• Ensure adherence to standards and operational docs.
• Contribute to disaster recovery planning and tests.

Skills

z/OS administration

CICS configuration

TLS encryption

cryptographic services

system monitoring

hybrid cloud experience

problem solving

communication

Tools

BMC MainView

BMC Datastream

Dynatrace

REXX

z/OS scripting

Ansible

Git

Jenkins

Job description

Role Description

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 ICTF (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 ICAF, 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

Skills

• Mainframe,Systems Engineering,IBM z/OS Mainframe,Production Support