Development and maintenance
Building, evolving and improving mainframe applications in COBOL, PL/1, Natural, Easytrieve and SAS, on DB2, IMS, VSAM or ADABAS.
Mainframe development consulting · Quebec
The core systems that run finance, in good hands.
Bunster Tengelmann Inc. brings you the expertise of Rodrigo Bunster, senior mainframe analyst-developer: 20 years of COBOL, DB2, IMS, CICS and JCL for banks, insurers and the public sector.
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- 20 yearsof mainframe experience
- 11organizations served
- Since 2018Bunster Tengelmann Inc.
- 4 languagesFrench · English · Portuguese · Spanish
Services
From business need to production
Mandates within a team or on my own, on site or remote, with the rigour that critical systems demand.
Production and batch support
Resolving production incidents and bugs, tracking defects, supporting daily and monthly batch, and safe production releases.
Functional analysis and documentation
Requirements gathering, functional specifications, test plans and test evidence, release documentation, and functional and acceptance testing.
Technical leadership
Lead developer role, coaching agile teams, code review before production, and architecture vision sessions.
Mainframe and artificial intelligence
Careful use of AI tools to understand legacy COBOL programs faster, document under-documented systems, prepare test cases and review code, always with human validation and respecting the confidentiality of client data.
Banking and card payments
Life and P&C insurance
Government of Quebec
Financial markets
Expertise
The mainframe environment, end to end
Highlighted technologies are the ones used in the most recent mandates.
Languages
Data
Platforms
Tools
Methods and collaboration
Artificial intelligence
Experience
Mandates and experience
Since 2018, mandates have been delivered through Bunster Tengelmann Inc.
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February 2026 – present
iA Financial Group (Industrielle Alliance) Current
Lead Developer · Individual Life Insurance team
Back with the Individual Life Insurance team, now as lead developer: technical lead for the maintenance, evolution and improvement of the life insurance systems (ALIS, VLN, ISCM), bug analysis and batch support. Uses AI tools to speed up the analysis of existing code, documentation and test preparation.
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February 2021 – January 2026
National Bank of Canada
Senior Mainframe Analyst-Developer
Maintenance and production support of the credit and debit card systems (CARDPAC, FBS, POS, ATM) in a team of 15. Incident resolution, functional testing, batch support, agile coaching for the team and Kanban board management.
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August 2023 – December 2024
Promutuel Insurance
Senior Mainframe Developer
Maintenance and production support of the accounting systems in an agile team of 5: production bug fixing, functional testing and batch support.
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October 2018 – February 2021
iA Financial Group (Industrielle Alliance)
Senior Mainframe Analyst-Developer
Maintenance, evolution and improvement of the life insurance systems (ALIS, VLN, ISCM) in a team of 16, including bug analysis and batch support.
Show experience before 2018
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July 2018 – October 2018
Quebec Ministry of Sustainable Development (MDDELCC)
Functional Analyst and Developer
Lead analyst for the drinking water analysis system and the SENTINELLE system, in a team of 12.
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August 2016 – July 2018
Revenu Québec
Functional Analyst, Developer and Application Architect
Accountability reporting system: new projects from analysis to production, COBOL code review before releases, architecture vision sessions and documentation, monthly batch support.
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December 2015 – July 2016
Desjardins Group
Functional Analyst and Developer
Systems of the Desjardins Group oversight office (BSMD): new projects, maintenance, and weekly and monthly batch support.
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August 2012 – December 2015
Systématix — mandates at RAMQ and SAAQ
Functional Analyst and Developer
RAMQ: health professionals' remuneration system, in a team of 30. SAAQ: road accident victim compensation system.
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September 2009 – May 2012
BM&FBovespa (São Paulo)
Functional Analyst and Developer
Lead expert on the derivatives market allocation system, and contributor to international projects with SunGard and Cinnober.
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October 2008 – August 2009
Accenture Brazil — client First Data
Functional Analyst and Developer
Merchant financial system for credit card transaction processing, working with teams in the United States and India.
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September 2006 – September 2008
Tata Consultancy Services — client Banco Real (ABN AMRO)
Functional Analyst and Developer
Development of the bank's payment system and resolution of production issues in automatic debit.
Education
- Bachelor's degree in Computer Systems · FIAP, São Paulo · 2009
- College diploma in Computer Science · Oswaldo Cruz Technical School, São Paulo · 2005
Languages
- French · working language
- English
- Portuguese
- Spanish
Products
Built by Bunster Tengelmann
Marombando
A Push / Pull / Legs workout log for Android: weights, reps, a workout timer, progress charts and an offline coach. No ads, no tracking; your data stays on your phone.
Contact
Need a mainframe specialist?
Write to discuss your needs, the duration and the way of working (on site, hybrid or remote).