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Mainframe Support Jobs in Ontario (NOW HIRING)

Software Engineer II (Mainframe)

Toronto, ON ยท On-site

CA$81K - CA$115K/yr

The L9 Mainframe Software Engineer II is responsible for producing high-quality functional and ... Support development of strategic solutions that improve cost effectiveness, delivery efficiency ...

To support the vision, we are seeking a Software Engineer who will play an important part in the ... Comprehensive experience in mainframe development complex programs using Cobol, JCL, IMS DB, DB2 ...

Senior Software Engineer (Mainframe)

Toronto, ON ยท On-site

CA$81K - CA$115K/yr

Support business inquiries and operational needs through small enhancements, maintenance, and break ... Strong engineering background delivering enterprise applications, including mainframe solutions ...

Support business inquiries and operational needs through small enhancements, maintenance, and break ... Strong engineering background delivering enterprise applications, including mainframe solutions ...

Quality Engineer I - Mainframe

Toronto, ON ยท Remote

CA$69K - CA$98K/yr

Mainframe testing (COBOL, DB2, IMS, CICS screens is a must) and API is good to have. * As a Test ... Actively seek and support continuous improvement and automation opportunities within the quality ...

Performs QE activities to support enterprise scale data transformation and modernization. Ensures ... in Mainframe environment Experience with testing data transformations, data migrations and batch ...

Provide Level 1 technical support on a rotating 24/7 on-call basis for all development zSeries mainframe environments, ensuring maximum system availability and reliability * Troubleshoot and resolve ...

Active Directory, Azure Active Directory / Entra ID, Windows, Unix/Linux, Databases, Mainframe ... Experience supporting Zero Standing Privilege (ZSP) initiatives. * Experience with enterprise ...

z/OS Connect Systems Programmer

Toronto, ON ยท On-site

CA$81K - CA$115K/yr

Mainframe & Database Services group within Mainframe Delivery, Infrastructure and Engineering Team is responsible for Support, Design, Build, Test and Deploy of Mainframe database and transaction ...

Support operations teams during critical periods, including tax processing season and monthly ... Oversee and guide the integration of legacy mainframe applications with cloud platforms products in ...

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Showing results 1-20

Mainframe Support information

What is a mainframe support?

A Mainframe Support job involves maintaining, troubleshooting, and optimizing mainframe systems to ensure smooth operations. Responsibilities typically include monitoring system performance, resolving technical issues, applying software updates, and ensuring data security. Mainframe Support professionals work with legacy systems, batch processing, and various programming languages like COBOL or JCL. Their role is critical in industries like banking, healthcare, and government, where mainframes handle large-scale transactions and data processing.

What are the typical daily responsibilities of a mainframe support?

Mainframe Support professionals typically monitor system performance, respond to incidents or service requests, and perform routine maintenance to ensure mainframe systems run smoothly. Their day may include troubleshooting job failures, updating software or system configurations, and working with application teams to resolve integration or data transfer issues. They often participate in on-call rotations and collaborate closely with other IT teams, such as network or security specialists. These responsibilities are essential to minimize downtime and maintain uninterrupted business operations.

What are the key skills and qualifications needed to thrive in mainframe support, and why are they important?

To thrive as a Mainframe Support professional, you need a solid understanding of mainframe operating systems (such as z/OS), basic programming skills, and troubleshooting abilities, typically supported by a degree in computer science or equivalent experience. Proficiency with tools like IBM ISPF, SDSF, JCL, and familiarity with monitoring and batch processing tools, as well as certifications like IBM Certified System Administrator, are often expected. Strong analytical thinking, communication, and teamwork skills are crucial for effectively addressing technical issues and collaborating with cross-functional teams. These abilities ensure prompt issue resolution and maintain the stability and reliability of critical business systems.

Is mainframe support still in demand?

Mainframe support professionals are still in demand due to the continued reliance of large organizations on mainframe systems for critical operations. Skills in COBOL, JCL, and mainframe troubleshooting remain valuable, especially in finance, government, and insurance sectors where legacy systems are prevalent.

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

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

Infographic showing various Mainframe Support job openings in Ontario as of August 2026, with employment types broken down into 1% As Needed, 67% Full Time, 28% Part Time, and 4% Contract. Highlights an 89% Physical, 3% Hybrid, and 8% Remote job distribution.

Senior Mainframe Developer - Application Design - Hybrid

Tech Talent International

Toronto, ON โ€ข Hybrid

CA$50/hr

Full-time

Posted 19 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.