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The Advanced Technology Centers (ATCs) are the engine for reinvention in our clients' transformation journey. Powered by more than 255,000 people across 24 countries, ATCs provide our clients with seamless access to industry insights and innovative technology solutions.

Stronger together!

The Advanced Technology Centers (ATCs) make a tremendous impact in solving our clients' business problems by leveraging innovation, intelligence, industry insights, new IT, and current technology skills. With the global environment changing at a faster pace, our clients are facing unprecedented challenges, and they need us more than ever before. As a Network, ATCs are positioned to unlock greater opportunities and exponential value for our clients.

The value for our clients and our people:

For our clients, the Network provides the strength of our geographic diversity, greater resilience, and seamless access to the deepest industry knowledge, the latest in Gen AI solutions, and tech expertise from around the world.

For our people, it brings an opportunity to shape truly boundaryless career paths in a highly collaborative team of experts where they can learn from each other and solve the world's most complex client challenges.

You Are An experienced Mainframe Developer with a strong background in COBOL, JCL, DB2, CICS, and VSAM, ideally within Canadian retail banking or retail investments. You bring strong analytical and troubleshooting skills, hands-on mainframe expertise, and experience supporting complex, business-critical applications.

Key Responsibilities

Design, develop, test, and maintain applications using COBOL, JCL, DB2, and CICS

Build and optimize batch processing for account processing, interest calculation, fee assessment, investment transactions, income distributions, and tax slip generation (T3, T5, T4RSP/RIF, NR4)

Develop online transactions and interfaces for branch, advice, digital, and call-centre channels





Convert functional specifications into technical designs, and perform impact analysis and code reviews

Troubleshoot production incidents including abends, data issues, and batch delays; participate in on-call support

Support integration with distributed systems via MQ, APIs, and z/OS Connect

Deploy changes using change and release management tools, following SDLC and ITIL processes

Maintain technical documentation, runbooks, and operational procedures

Adhere to security, audit, and regulatory controls, including data privacy and segregation of duties

This role requires a minimum of 3 days per week of on-site presence in Mississauga.

Here’s What You Need

Atleast 5-10+ years of hands-on mainframe development experience, with strong exposure to Canadian retail banking and/or retail investments

You bring strong proficiency in COBOL, JCL, DB2 (including SQL and performance tuning), CICS, and VSAM

You bring experience working with DFSORT/SYNCSORT, REXX, and enterprise scheduling tools such as CA-7, Control-M, or TWS

You bring hands-on experience using debugging and data analysis tools such as Xpediter, Abend-AID, File-AID, and Fault Analyzer

You bring experience developing and maintaining COBOL programs and copybooks in IDz, including use of the z/OS Connect toolkit to map OpenAPI JSON schemas to backend data structures such as COMMAREA and containers

You bring experience integrating z/OS Connect adapters with CICS, IMS, and Db2 subsystems, and using IDz interactive tools to debug and trace API execution on z/OS





You should bring experience with source code and release management tools such as Endevor, ChangeMan, or Git-based platforms

You bring a strong understanding of batch processing windows, SLAs, restart/recovery design, and data reconciliation

You bring strong analytical thinking, problem-solving, and troubleshooting skills

Bachelor's degree in Computer Science, Computer Systems Engineering, Software Engineering, or a closely related field

Bonus points if

You bring experience working with a major Canadian bank, investment dealer, or fund company

You should bring knowledge of retail investment processing, including mutual fund trades, Fundserv messaging, registered plan contributions and withdrawals, withholding tax, and year-end slips

You bring exposure to IMS, PL/I, or Assembler

You should bring experience with mainframe DevOps tools and practices, including Zowe, Jenkins, IBM DBB, and IBM Z Open Development

You bring familiarity with modernization initiatives, including mainframe-to-cloud integration and API enablement

You should bring an understanding of OSFI technology and cyber risk expectations (B-13) and third-party risk guidelines (B-10)

Compensation at Accenture varies depending on a wide array of factors, which may include but are not limited to the specific office location,role, skill set, and level of experience. As required by local law, Accenture provides a reasonable range of compensation, based on full-time employment, for roles that may be hired as set forth below. The base pay range shown below is intended as a guideline to reflect the majority of offers for this role.

It does not represent a maximum limit - in some cases, actual compensation may exceed the range where appropriate. Information on benefits is here.

Role Location: British Columbia/Ontario/New Brunswick Annual Salary Range: $82,600 to $132,600

📌 Custom Application Architect (Winnipeg)
🏢 Accenture
📍 Winnipeg