Senior ZOS (Operating System for IBM Z Mainframe) Technician

Position Description
Company Profile:

At CGI, we’re a team of builders. We call our employees members because all who join CGI are building their own company - one that has grown to 72,000 professionals located in 40 countries. Founded in 1976, CGI is a leading IT and business process services firm committed to helping clients succeed. We have the global resources, expertise, stability and dedicated professionals needed to achieve. At CGI, we’re a team of builders. We call our employees members because all who join CGI are building their own company - one that has grown to 72,000 professionals located in 40 countries. Founded in 1976, CGI is a leading IT and business process services firm committed to helping clients succeed. We have the global resources, expertise, stability and dedicated professionals needed to achieve results for our clients - and for our members. Come grow with us. Learn more at
This is a great opportunity to join a winning team. CGI offers a competitive compensation package with opportunities for growth and professional development. Benefits for full-time, permanent members start on the first day of employment and include a paid time-off program and profit participation and stock purchase plans. We wish to thank all applicants for their interest and effort in applying for this position, however, only candidates selected for interviews will be contacted. No unsolicited agency referrals please.

Job Title: Senior ZOS (Operating System for IBM Z Mainframe) Technician
Category: IBM Z Mainframe Technician
Location: Bangalore
Employment Type: Full Time
Position ID: J0626-2083
Experience Required: 5–10+ Years

Job Summary
We are seeking a highly skilled and experienced Senior z/OS Technician to join our Mainframe Infrastructure Services team. The successful candidate will be responsible for the administration, maintenance, monitoring, support, and optimization of IBM z/OS environments that support mission critical enterprise applications and business operations.
The ideal candidate will possess strong expertise in IBM Mainframe technologies, operating system administration, performance tuning, automation, security, and production support. This role requires collaboration with infrastructure, middleware, database, application, and security teams to ensure the stability, availability, performance, and security of the organization's Mainframe platform.

Key Responsibilities
z/OS System Administration

. Administer, configure, and maintain IBM z/OS operating system environments.
. Support z/OS system software installation, maintenance, upgrades, and patch management using SMP/E.
. Manage and maintain system parameters, PARMLIB members, PROCLIBs, and operational configurations.
. Ensure system availability, reliability, and performance across production and non-production environments.

System Monitoring and Operations Support

. Monitor Mainframe system health, performance, capacity, and resource utilization.
. Identify and resolve system issues impacting availability and performance.
. Provide Level 2 and Level 3 support for operating system related incidents and service requests.
. Participate in major incident management and critical issue resolution activities.

Performance and Capacity Management

. Analyze CPU, memory, storage, and workload utilization trends.
. Perform performance tuning and optimization activities.
. Support capacity planning initiatives and provide recommendations for infrastructure growth.
. Monitor and manage Workload Manager (WLM) policies and system performance objectives.

Security Administration

. Support RACF administration activities, including user provisioning, access management, and security policy implementation.
. Ensure compliance with organizational security standards and audit requirements.
. Assist in vulnerability remediation and security assessments.
. Support regulatory and compliance audits.

Storage and System Resource Management

. Support DASD, tape, and storage management activities.
. Coordinate with storage teams to optimize storage utilization and performance.
. Manage system datasets and catalog related activities.
. Ensure effective backup and recovery procedures are maintained.

Change, Release, and Maintenance Management

. Implement approved changes in accordance with change management processes.
. Support system upgrades, migrations, maintenance activities, and technology refresh initiatives.
. Conduct impact analysis and validation testing following system changes.
. Maintain accurate documentation for all infrastructure changes.

Disaster Recovery and Business Continuity

. Support disaster recovery planning, testing, and execution.
. Ensure recovery procedures are documented and regularly validated.
. Participate in business continuity exercises and infrastructure resilience initiatives.
. Assist in recovery efforts during system outages and disaster scenarios.

Automation and Continuous Improvement

. Develop and maintain automation scripts and operational procedures.
. Identify opportunities to improve operational efficiency and reduce manual effort.
. Contribute to infrastructure modernization and transformation initiatives.
. Maintain technical documentation, standards, and operational runbooks.

Leadership and Collaboration

. Provide technical mentoring and guidance to junior team members.
. Collaborate with application, database, middleware, network, and security teams.
. Participate in architecture reviews and strategic infrastructure planning.
. Support enterprise-wide technology initiatives and projects.

Required Qualifications

. Bachelor's degree in computer science, Information Technology, Engineering, or a related discipline.
. Minimum 5–10 years of experience supporting IBM z/OS Mainframe environments.
. Proven experience in large scale enterprise production support environments.

Required Technical Skills
Core Mainframe Technologies

. IBM z/OS Administration
. SMP/E
. JES2/JES3
. TSO/ISPF
. SDSF
. JCL (Job Control Language)
. PARMLIB and PROCLIB Management
. Workload Manager (WLM)

Security

. RACF Administration
. Security Compliance and Audit Support
. User and Access Management

Performance and Operations

. System Performance Monitoring and Tuning
. Capacity Planning
. Incident and Problem Management
. High Availability and Resiliency Practices

Infrastructure Support

. Storage Management
. Catalog Management
. Backup and Recovery Processes
. Disaster Recovery Support

Service Management

. ITIL based Incident, Problem, Change, and Release Management

Preferred Qualifications

. IBM z/OS System Administration Certification.
. ITIL Foundation Certification.
. Experience supporting: IBM Db2 for z/OS IMS CICS IBM MQ Mainframe Automation Tools

Enterprise Monitoring Solutions
. Experience with DevOps, automation, and infrastructure modernization initiatives.

Key Competencies

. Advanced troubleshooting and analytical skills.
. Strong communication and stakeholder management abilities.
. Ability to work effectively under pressure in a mission critical environment.
. Excellent problem solving and decision-making skills.
. Strong attention to detail and commitment to operational excellence.
. Leadership, mentoring, and team collaboration capabilities.
. Continuous improvement and customer focused mindset.

Working Conditions

. Participation in an on call support rotation may be required.
. Ability to support planned maintenance activities outside standard business hours.
. Support for global business operations across multiple time zones.
. Occasional weekend or holiday support during major upgrades and disaster recovery exercises.

Success Measures
Performance in this role will be measured through:

. z/OS platform availability and uptime.
. Incident resolution effectiveness and SLA compliance.
. Successful implementation of system upgrades and changes.
. Performance optimization and capacity management outcomes.
. Compliance with security, audit, and regulatory requirements.
. Reduction in recurring infrastructure incidents.
. Stakeholder and customer satisfaction.

#LI-SB2

Your future duties and responsibilities

Required qualifications to be successful in this role

Together, as owners, let’s turn meaningful insights into action.

Life at CGI is rooted in ownership, teamwork, respect and belonging. Here, you’ll reach your full potential because…

You are invited to be an owner from day 1 as we work together to bring our Dream to life. That’s why we call ourselves CGI Partners rather than employees. We benefit from our collective success and actively shape our company’s strategy and direction.

Your work creates value. You’ll develop innovative solutions and build relationships with teammates and clients while accessing global capabilities to scale your ideas, embrace new opportunities, and benefit from expansive industry and technology expertise.

You’ll shape your career by joining a company built to grow and last. You’ll be supported by leaders who care about your health and well-being and provide you with opportunities to deepen your skills and broaden your horizons.

That same commitment to fairness extends to how we use technology. To support our recruitment team, AI tools may be used to help assess applications though they never replace human judgement. All hiring decisions remain entirely in the hands of our recruitment professionals.

Come join our team—one of the largest IT and business consulting services firms in the world.

Senior ZOS (Operating System for IBM Z Mainframe) Technician

Start with your email