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Mainframe Administration Jobs in Ontario (NOW HIRING)

Capco

Lead Database Administrator (DBA) - SUPRA

Toronto, ON · Hybrid

  • Medical

  • Life

  • Retirement

Lead legacy modernization and support critical mainframe database environments The Role As a Lead ... Administration * Strong expertise in Supra, IBM z/OS, COBOL, JCL, and CICS * Experience supporting ...

Td

Software Engineer III

Toronto, ON

CA$125K - CA$154K/yr

  • Medical

  • Retirement

  • PTO

Ultimately, providing expert advice and lead in system / application administration, installation ... Mainframe experience: * COBOL, JCL, IMS DB/DC environment, IMS Databases, DB2, MQ, Endevor, CA7 ...

KeyData Cyber

CyberArk Support Engineer

Toronto, ON · Remote

Workforce IAM (Access Management, Identity Governance and Administration, Privileged Access ... Active Directory, Azure Active Directory / Entra ID, Windows, Unix/Linux, Databases, Mainframe ...

Broadridge

Senior Project Manager

Toronto, ON · On-site

CA$100K - CA$120K/yr

Bachelor's degree in a relevant field (Project Management, Business Administration, Computer Science, Engineering or similar). * Experience managing or working on mainframe software development ...

All JobsMainframe Administration JobsMainframe Administration Jobs in Ontario

Mainframe Administration information

What is mainframe administration?

Mainframe Administration involves managing and maintaining mainframe computer systems, which are powerful servers used by large organizations for critical applications and bulk data processing. Mainframe Administrators are responsible for installing, configuring, monitoring, and securing mainframe hardware and software. They ensure system performance, troubleshoot technical issues, handle backup and recovery, and apply updates or patches to keep systems running smoothly and securely. This role often requires strong technical skills, attention to detail, and the ability to work with legacy systems.

What are the key skills and qualifications needed to thrive as a mainframe administrator, and why are they important?

To thrive as a Mainframe Administrator, you need a solid understanding of mainframe operating systems (such as z/OS), system configuration, and troubleshooting, typically supported by a degree in computer science or related IT experience. Familiarity with tools like IBM System Automation, JCL, RACF, and monitoring solutions, as well as certifications such as IBM Certified System Administrator, is highly valued. Strong analytical thinking, attention to detail, and effective communication skills help administrators efficiently resolve issues and collaborate with IT teams. These skills and qualifications are essential to ensure the reliability, security, and optimal performance of critical enterprise computing environments.

What are some common challenges faced by mainframe administrators and how can they be addressed?

Mainframe Administrators often encounter challenges such as managing legacy systems, ensuring system uptime, and balancing security with accessibility. Keeping up with evolving technologies and integrating mainframes with modern applications can require continuous learning and adaptation. Effective communication with development and operations teams is vital to ensure seamless updates and minimize downtime. Proactively monitoring system performance and applying best practices for disaster recovery can also help mitigate risks and maintain reliability.

What is the difference between Mainframe Administration vs Mainframe Support?

AspectMainframe AdministrationMainframe Support
CertificationsIBM Certified System Administrator, z/OS certificationsSimilar certifications, often including z/OS support certifications
Work EnvironmentData centers, enterprise IT departments managing mainframe systemsHelp desks, support teams assisting users and troubleshooting issues
ResponsibilitiesSystem setup, configuration, maintenance, performance tuningIssue resolution, user support, incident management
Industry UsageFinancial institutions, government agencies, large corporationsSame industries, focusing on user support and problem resolution

Mainframe Administration involves managing and maintaining mainframe systems, ensuring optimal performance and security. Mainframe Support focuses on assisting users, troubleshooting issues, and resolving incidents. Both roles require similar certifications and are vital in industries relying on mainframe technology, but they differ in daily responsibilities and focus areas.

Is it hard to become a mainframe administrator?

Becoming a mainframe administrator requires a strong understanding of mainframe systems like IBM z/OS, proficiency in scripting and automation, and often a relevant certification. The role can be technically challenging due to the complexity of mainframe environments, but with proper training and experience, it is achievable for those with a background in IT or computer science.

Is mainframe administration a good career option?

Mainframe administration is a stable and well-paying career that involves managing large-scale computer systems used by many organizations. It requires knowledge of mainframe operating systems like z/OS, skills in system maintenance, and often certifications such as IBM Certified System Administrator. The role offers opportunities for specialization and long-term job security due to the continued reliance on mainframes in industries like finance and government.

What does a mainframe administrator do?

A mainframe administrator manages and maintains large-scale computer systems known as mainframes, ensuring their security, performance, and availability. They configure hardware and software, monitor system operations, troubleshoot issues, and implement updates, often using tools like z/OS and requiring knowledge of system security and backup procedures.

What are popular job titles related to Mainframe Administration jobs in Ontario?

For Mainframe Administration jobs in Ontario, the most frequently searched job titles are:

What job categories do people searching Mainframe Administration jobs in Ontario look for?

The top searched job categories for Mainframe Administration jobs in Ontario are:

Mainframe Administration jobs near you
Infographic showing various Mainframe Administration job openings in Ontario as of August 2026, with employment types broken down into 1% As Needed, 79% Full Time, 18% Part Time, and 2% Contract. Highlights an 92% Physical, 3% Hybrid, and 5% Remote job distribution.

Senior Mainframe Developer - Application Design - Hybrid

Tech Talent International

Toronto, ON • Hybrid

CA$50/hr

Full-time

Posted 18 days ago

Job description

Tech Talent International (TTI) supplies technical talent to a variety of clients ranging from Fortune 100/500/1000 companies to startups, small and mid-sized organizations in Canada/US. We are currently hiring a Senior Mainframe Developer - Application Design - Hybrid for our consulting client in the Toronto area.

Role: Senior Mainframe Developer - Application Design - Hybrid

Type: Contract

Rate Range: $50/hr C2C (40 hrs /week)

Duration: 8 months + potential extensions

Location: Hybrid (2 onsite/3 days from home) downtown Toronto, ON, Canada

Mainframe Senior Developer
Skills Required: 

Mainframe DB2 

Application Development~System I 

COBOL400~IT IS_AMS_Mainframe_DB2 Administration
Experience Required: 6-8 Years
Qualifications :
Experience in Mainframe lead Developer
Should have coding experience in CICS,COBOL, DB2, JCL.
Experience with application design, development and deployment
Skills and Responsibilities:
Design, develop and maintain Mainframe COBOL & JCL to meet support and/or project requirements.
Interface with business and IT teams to understand business requirements and translate business requirements into formal technical requirements and application code.
Develop and execute unit test and integration plans/scripts to validate that application changes meet technical specifications.
Responsible for full System Development Life Cycle Participate in production support Provide Solution Delivery Methodology artifacts associated with application components.
Participate in technical reviews at appropriate stages of development.