Senior z / OS Administrator

Job Title :

Senior z / OS Administrator

Experience Required :

8–10 years

Job Summary :

We are seeking an experienced z / OS Administrator to manage, maintain, and optimize our IBM mainframe environment. The role involves ensuring system availability, performance tuning, security management, and providing technical support for business-critical applications running on z / OS.

Key Responsibilities :

Administer and support IBM z / OS mainframe systems, including installation, configuration, and maintenance.

Perform system upgrades, patching, and integration with related subsystems (CICS, DB2, IMS, MQ, RACF, etc.).

Monitor system performance and implement tuning measures for optimal efficiency.

Manage system security and access controls (RACF / ACF2 / Top Secret).

Troubleshoot and resolve complex system and infrastructure issues.

Support disaster recovery planning, testing, and implementation.

Collaborate with application, network, and storage teams to ensure seamless operations.

Prepare and maintain system documentation, procedures, and operational standards.

Provide mentoring and guidance to junior team members.

Required Skills & Qualifications :

8–10 years of hands-on experience in IBM z / OS system administration.

Strong expertise in mainframe subsystems (CICS, DB2, IMS, MQ, etc.).

In-depth knowledge of security tools (RACF / ACF2 / Top Secret).

Proficiency in JCL, REXX, and automation tools.

Experience with performance monitoring and capacity planning.

Familiarity with disaster recovery and high availability environments.

Strong analytical, problem-solving, and communication skills.

Education :

Bachelor’s degree in Computer Science, Information Technology, or related field (or equivalent work experience).