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Computer Operator Mainframe Jobs in Ontario (NOW HIRING)

Simulator technician 1-1

Toronto, ON · On-site

$24.50 - $28/hr

... in operating test equipment (oscilloscope, multi-meter, signal generator, logic analyzer, etc.). * Knowledge in analog and digital theory. * Computer literate (PC and/or computer mainframe ...

Technology Solutions Pay Details: $76,800 - $115,200 CAD This role is eligible for a discretionary ... Knowledge of mainframe integration patterns, including batch processing and flat file exchanges.

Computer Operator Mainframe information

See Ontario salary details

$10

$26

$50

How much do computer operator mainframe jobs pay per hour?

As of Sep 15, 2026, the average hourly pay for computer operator mainframe in Ontario is $26.16, according to ZipRecruiter salary data. Most workers in this role earn between $19.23 and $29.57 per hour, depending on experience, location, and employer.

What is a computer operator mainframe?

A Computer Operator Mainframe is responsible for monitoring, managing, and troubleshooting mainframe computer systems. They ensure that batch jobs run correctly, system backups are performed, and any errors or failures are addressed promptly. Operators use specialized software and tools to oversee system performance and maintain uptime. This role often requires working in shifts to provide 24/7 operational support. Strong attention to detail and problem-solving skills are essential in this position.

What does a computer operator mainframe do?

A typical shift for a Computer Operator Mainframe involves monitoring mainframe systems, running scheduled and ad-hoc jobs, and troubleshooting any system alerts or errors that occur during operations. Operators are responsible for ensuring jobs are completed successfully, performing regular system health checks, and escalating issues to system administrators or other technical teams if needed. The work environment is usually structured in shifts to provide 24/7 coverage, with operators collaborating closely with both technical and business teams to ensure critical applications remain available. You can expect a mix of routine monitoring, responding to incidents, and documenting system activity, which makes attention to detail and clear communication especially important for success in this role.

What are the key skills and qualifications needed to thrive in the computer operator mainframe position?

To thrive as a Computer Operator Mainframe, you need a solid understanding of mainframe operations, batch processing, job scheduling, and system monitoring, often supported by a degree in computer science or a related field. Familiarity with operating systems like IBM z/OS, tools such as JCL, TSO/ISPF, and knowledge of automation software or mainframe consoles is essential. Strong attention to detail, problem-solving ability, and effective communication skills help operators stand out in this role. These skills ensure smooth system operations, quick resolution of technical issues, and clear collaboration with IT teams, minimizing downtime and maintaining high system reliability.

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

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

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

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

Infographic showing various Computer Operator Mainframe job openings in Ontario as of September 2026, with employment types broken down into 42% Full Time, and 58% Contract. Highlights an 88% In-person, 6% Hybrid, and 6% Remote job distribution, with an average salary of $54,419 per year, or $26.2 per hour.

Sr. Mainframe Application Engineer, TD Securities

Toronto, ON

CA$105K - CA$129K/yr

Full-time

Posted 12 days ago


Job description

Work Location:

Toronto, Ontario, Canada

Hours:

37.5

Line of Business:

Technology Solutions

Pay Details:

$105,100 - $129,400 CADThis role is eligible for a discretionary variable compensation award that considers business and individual performance.

TD is committed to providing fair and equitable compensation opportunities to all colleagues. Growth opportunities and skill development are defining features of the colleague experience at TD. Our compensation policies and practices have been designed to allow colleagues to progress through the salary range over time as they progress in their role. The base pay actually offered may vary based upon the candidate's skills and experience, job-related knowledge, geographic location, and other specific business and organizational needs.

As a candidate, you are encouraged to ask compensation related questions and have an open dialogue with your recruiter who can provide you more specific details for this role.

Job Description:

Department Overview
Building a World-Class, Diverse and Inclusive Technology Team

TD Securities offers a wide range of capital markets products and services to corporate, government, and institutional clients who choose us for our innovation, execution, and experience.

With more than 6,500 professionals operating out of 40 cities across the globe, we help clients meet their needs today and prepare for tomorrow. Our services include underwriting and distributing new issues, providing trusted advice and industry-leading insight, extending access to global markets, and delivering integrated transaction banking solutions.

We are growth-oriented, people-focused, and community-minded. As a team, we work to deliver value for our clients every day.

Job Description Summary

Develops and maintains technical solutions that adhere to engineering and architectural design principles while meeting business requirements. Provides technical expertise with a focus on efficiency, reliability, scalability, and security; includes planning, evaluating, recommending, designing, operationalizing, and supporting solutions in compliance with enterprise and industry standards.

Job Description: Senior Mainframe Application EngineerAbout This Role

TD Securities' Payments Workflow Technology team is seeking a Senior Mainframe Application Engineer to design, develop, deliver, and support solutions aligned with the firm's technology strategy. The team is responsible for delivering technology solutions across the Payments distributed workflow, spanning both mainframe and distributed application components.

Responsibilities:
  • In this role, you will contribute to the creation of endtoend technical solutions, with accountability for detailed technical design, development, delivery, and ongoing production support of complex payment systems.

  • You will work on largescale, highcomplexity, and enterprisewide initiatives, taking ownership of sophisticated programming and coding activities across online and batch mainframe applications.

  • We are looking for a seasoned engineer with a strong technical toolkit and a handson mindset, capable of developing and maintaining robust solutions that adhere to engineering best practices and architectural standards, while meeting business, regulatory, and operational requirements.

  • You will provide deep technical expertise with a focus on efficiency, reliability, scalability, security, and operational resilience, supporting applications throughout their full lifecycle - from planning and design through implementation, production support, and continuous improvement.

  • You will participate in the development of test strategies, test plans, and test cases, and contribute handson to testing efforts, including unit testing and integration testing, while supporting higherlevel testing phases such as SIT , BAT and PAT.

  • Provide technical support to business and testing teams throughout testing phases, including clarifying design intent, troubleshooting issues, and validating results.

  • Actively participate in defect management, including defect tracking, triage, root cause analysis, and timely resolution in collaboration with crossfunctional teams.

  • This position carries responsibility not only for solution delivery, but also for application stability in production.

  • You will participate in production support activities, incident investigation, and scheduled oncall rotations for missioncritical payment systems, ensuring timely resolution of issues and minimal business impact.

  • This role can adapt to Agile delivery practices, with strong working knowledge of Spring and related frameworks.

  • At TD, you will be inspired by meaningful work, challenging problems, and a collaborative environment that values technical excellence, accountability, and ownership.

What Can You Bring to TD?

Your experience matters as much as your credentials. We are looking for a candidate who brings the following:

  • Graduate/Undergraduate Degreein Technology.

  • Must have strong skills and 5+ yrs working experience in mainframe MVS, TSO, COBOL, JCL, Mainframe utilities, Endevor, CA-7, MQ and databases such as DB2 and IMS DB/DC.

  • Extensive handson experience with mainframe application development, including both online and batch processing in a production environment.

  • Experience providing application production support, including incident analysis, root cause investigation, defect resolution, and participation in oncall support rotations for critical systems.

  • Advanced understanding of business processes, technical environments, standards, controls, and operating procedures, with the ability to apply this knowledge to both development and production support scenarios.

  • Demonstrated readiness to operate as a senior or lead developer and trusted subject matter expert, independently addressing and resolving highly complex and multifaceted technical issues across development and production.

  • Recognized subject matter expertise in at least one technical discipline, with experience advising clients, partners, and project teams on research, analysis, solution design, development, testing, deployment, and production support.

  • Proven ability to lead complex technical initiatives, contribute to comprehensive project planning, and assess risks related to system changes, production stability, and thirdparty integrations.

  • Strong coaching and mentoring skills, with the ability to guide junior developers and collaborate effectively with crossfunctional teams.

  • High standards for quality, reliability, operational stability, and accountability in delivered solutions.

  • Excellent analytical, problemsolving, and troubleshooting skills, particularly in timesensitive production scenarios.

  • Knowledge of Wire payments, SWIFT MT messages, SWIFT ISO MX messages are an asset.

Additional Information:

Join in on what others in TD Global Technology Solutions are doing:

  • Inspire a positive work environment and help champion quality, innovation, teamwork and service to the business.

  • Learn voraciously, stretch your thinking, share your knowledge and educate others.

  • Communicate and collaborate with both technical and non-technical professionals.

  • Cultivate winning relationships by building trust with business and technology partners.

  • Share our commitment to productivity, effectiveness and operational efficiency.

#LI-Tech

Who We Are:

TD Securities offers a wide range of capital markets products and services to corporate, government, and institutional clients who choose us for our innovation, execution, and experience. With more than 6,500 professionals operating out of 40 cities across the globe, we strive to make every interaction, product and experience remarkably human and refreshingly simple. Our services include underwriting and distributing new issues, providing trusted advice and industry-leading insight, extending access to global markets, and delivering integrated transaction banking solutions. In 2023, we acquired Cowen Inc., offering our clients access to a premier U.S. equities business and highly-diverse equity research franchise, while growing our strong, diversified investment bank.

Together, we are reimagining what banking can be for our clients, colleagues and communities.

Our Total Rewards Package
Our Total Rewards package reflects the investments we make in our colleagues to help them and their families achieve their financial, physical, and mental well-being goals. Total Rewards at TD includes a base salary, variable compensation, and several other key plans such as health and well-being benefits, savings and retirement programs, paid time off, banking benefits and discounts, career development, and reward and recognition programs. Learn more

Additional Information:
We're delighted that you're considering building a career with TD. Through regular development conversations, training programs, and a competitive benefits plan, we're committed to providing the support our colleagues need to thrive both at work and at home.

Please be advised that this job opportunity is subject to provincial regulation for employment purposes. It is imperative to acknowledge that each province or territory within the jurisdiction of Canada may have its own set of regulations, requirements.


Colleague Development

If you're interested in a specific career path or are looking to build certain skills, we want to help you succeed. You'll have regular career, development, and performance conversations with your manager, as well as access to an online learning platform and a variety of mentoring programs to help you unlock future opportunities.

If you're passionate about helping clients and building deep, lasting relationships, TD offers diverse career paths where you can grow your expertise and make a meaningful impact.

We're committed to your success and foster a respectful workplace where diverse perspectives are valued, everyone has fair opportunities to grow, and you can unlock your full potential to achieve your career goals. Here at TD, we hire and develop the best.

Training & Onboarding
We will provide training and onboarding sessions to ensure that you've got everything you need to succeed in your new role.

Interview Process
We'll reach out to candidates of interest to schedule an interview. We do our best to communicate outcomes to all applicants by email or phone call.


Accommodation
Your accessibility is important to us. Please let us know if you'd like accommodations (including accessible meeting rooms, captioning for virtual interviews, etc.) to help us remove barriers so that you can participate throughout the interview process.
We look forward to hearing from you!

Language Requirement (Quebec only):

Sans Objet