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Mainframe Support Jobs in Ontario (NOW HIRING)

Pacer Group

Mainframe Developer

Toronto, ON · Hybrid

Develop| maintain| and support mainframe applications and batch processes. Analyze| troubleshoot| and resolve production issues while ensuring system stability and performance. Work with business and ...

Pacer Group

Senior Mainframe Developer

Toronto, ON · Hybrid

Proven experience as a Mainframe Lead Developer with expertise in leading the design, development, enhancement, and support of enterprise Mainframe applications. * Strong hands-on coding experience ...

Td

Software Engineer II (Mainframe)

Toronto, ON · 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 ...

United Airlines

Mainframe Developer

Toronto, ON

The core application is a large, sophisticated mainframe-based system which connects clients to ... This 24/7 application supports critical delivery channels such as Online Banking, POS, ATM and ...

Scotiabank

Mainframe Developer

Toronto, ON · On-site

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 ...

Td

Senior Software Engineer (Mainframe)

London, ON

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 ...

Td

Senior Software Engineer (Mainframe)

Toronto, ON

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 ...

Td

Quality Engineer I - Mainframe

Toronto, ON · 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 ...

Scotiabank

Quality Engineer(Mainframe)

Toronto, ON · On-site

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

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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:

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

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

Mainframe Support jobs near you
Infographic showing various Mainframe Support job openings in Ontario as of August 2026, with employment types broken down into 1% As Needed, 72% Full Time, 22% Part Time, and 5% Contract. Highlights an 87% Physical, 3% Hybrid, and 10% Remote job distribution.

Mainframe Developer

Pacer Group

Toronto, ON • Hybrid

Full-time

Posted 13 days ago

Job description

Job Title: Mainframe Developer

Location: Toronto, ON

Work Arrangement: Hybrid (2-3days WFO)

Employment Type: Contract

Domain: BFSI

Duration:6-12 months

Hourly rate :-CAD 45-47/hour

Application Deadline: Sep 10 , 2026


SKILLS REQUIRED

Experience Required: 6-8 Years

Mainframe DB2 - Application Development

Seeking a Mainframe Developer to support| maintain| and modernize critical mainframe applications. The role involves developing and enhancing enterprise systems| troubleshooting production issues| and participating in large-scale modernization initiatives involving cloud migration and legacy transformation.


Key Responsibilities:

Develop| maintain| and support mainframe applications and batch processes.

Analyze| troubleshoot| and resolve production issues while ensuring system stability and performance.

Work with business and technical teams to gather requirements and implement enhancements.

Support mainframe modernization initiatives and integration with distributed cloud platforms.

Participate in code reviews| testing| deployments| and release activities.

Create and maintain technical documentation and operational runbooks.


EEOC Compliance:

We are an equal opportunity employer, and all qualified applicants will receive consideration for employment.


DISCLAIMER

AI Usage Policy: Pacer Group uses AI to assist in screening applications. Final hiring decisions are made by human recruiters based on qualifications and experience.

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