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Added 26 days ago
TM
Product Development Engineering Specialist
Trudell Medical International
London, ON
- Full-time
With oversight from Senior, Principal Engineer or Product Development Project Lead, design mechanical or electromechanical solutions to support device design
Added 26 days ago
Senior DevOps Engineer
Localcoin
Canada
This position will be based out of our Etobicoke, ON office, with an expectation of working in-office two days per week
Added 26 days ago
Senior Data Scientist, Financial Services
Clutch Technologies Inc.
Toronto, ON
…built Clutch's financial services offering, and we're hiring a Senior Data Scientist to help shape what it…
Added 26 days ago
Senior Data Engineer
Clutch Technologies Inc.
Toronto, ON
As a Senior Data Engineer, you'll own the data platform that powers decision-making across Clutch, from how we buy and price vehicles, to how customers move through our funnel, to how we…
Added 26 days ago
P
Senior Backend Engineer
Punt
Vancouver, BC
- $120,000 to $150,000 CAD / year
- Full-time
We’re seeking a Senior Backend Engineer to help design, build, and scale our next-generation social gaming platform. You’ll work on highly concurrent systems, architecting APIs and backend…
Added 26 days ago
LH
Senior Tax Accountant – Corporate Canadian Tax
Logic Hire Solutions LTD
Oakville, ON
- $70,000 to $120,000 CAD / year
- Full-time
Experience with SR&ED claims, transfer pricing, or cross-border tax · Hybrid Work: Only 1 day per week onsite – flexibility to work remotely the rest
Added 26 days ago
LH
Senior Tax Accountant – Corporate Canadian Tax
Logic Hire Solutions LTD
Mississauga, ON
- $70,000 to $120,000 CAD / year
- Full-time
Experience with SR&ED claims, transfer pricing, or cross-border tax · Hybrid Work: Only 1 day per week onsite – flexibility to work remotely the rest
Added 26 days ago
SS
Model Risk Governance Specialist
Soho Square Solutions
Montreal, QC
- Contract
Prepare and present reports on model risk status, outstanding issues, and remediation activities to senior management, internal audit, and regulators.
Added 26 days ago
M
Senior Embedded Systems Developer (C++/Python)
MANNARINO
Montreal, QC
- Full-time
Collaborate with the engineering team to convert an existing Python solution into C++ for execution in a real-time environment.
Added 26 days ago
SI
Senior Test Development Engineer
Stathera, Inc.
Vancouver, BC
- Full-time
Stathera is looking for a Senior Test Development Engineer to join our team. We encourage enthusiastic candidates with Bachelor’s, Masters’ or PhD degrees in relevant engineering fields…
Added 26 days ago
C
Senior Java Architect - Vice President
Citi
Mississauga, ON
- Full-time
As a Senior Java Architect at Citi, you will lead a team of engineers building Large Language Model and Retrieval-Augmented Generation solutions that power next-generation applications…
Added 26 days ago
C
Senior Engineering Manager
Citi
Mississauga, ON
- Full-time
We are seeking an exceptional Senior Engineering Manager to head the development and modernization of our Wholesale Lending Operations (WLO) Technology platforms and initiatives, based out…
Added 26 days ago
RA
Senior Data Scientist (Machine Learning & Generative AI)
Recrute Action
Toronto, ON
- Contract
Proficiency in Python for data science and GenAI application development.
Added 26 days ago
SS
Finance Project Manager
Soho Square Solutions
Montreal, QC
- Contract
Prepare and present regular reports on model risk status, issues, and mitigation efforts to senior management, internal audit and regulators.
Added 26 days ago
NB
Senior Solutions Architect IDP
National Bank of Canada
Montreal, QC
- Full-time
A career as a Senior Solution Architect within the Technology and Operations team at National Bank means acting as a subject matter expert in the design and evolution of Intelligent…
Added 26 days ago
Senior Analyst, Payments Data Intelligence
Payments Canada
Toronto, ON · Ottawa, ON
The Senior Analyst operates with full technical autonomy over codebases, complex SQL transformations, Python feature engineering, GCP data pipelines, and MLOps back testing suites. This…
Added 26 days ago
D
Platform Engineer
Dexian
Toronto, ON · Greater Toronto Area, Canada
- Contract
Work Arrangement: Hybrid – 4 days per week in office
Added 26 days ago
M
Ingénieur Support Mainframe / Mainframe Support Engineer
mthree
Montreal, QC
- Full-time
Ce poste requiert actuellement une présence sur site d'au moins trois jours par semaine
Added 26 days ago
A
Azure Enterprise Architect - Full Stack & AI Solutions (Canada)
Avanade
Toronto, ON
- Full-time
Provide technical leadership across backend platforms utilizing .NET, C#, Python, Node.js, microservices, APIs, event-driven architectures, and distributed systems.
Added 26 days ago
H
Senior Validation Engineer
Humanoid
Vancouver, BC
- Full-time
As a Senior Test and Validation Engineer at Humanoid, you will be responsible for bringing new hardware subsystems into a functional, controllable, measurable, and integration-ready state,…
Added 26 days ago
A
Data Scientist, Ricochet Anti-Cheat (Call of Duty)
Activision
Vancouver, BC
- Other
Learn from senior team members, share knowledge with peers, and contribute to a culture of fairness, accountability, and continuous improvement in game security.
Added 26 days ago
Product Development Engineering Specialist
Trudell Medical Group
London, ON
With oversight from Senior, Principal Engineer or Product Development Project Lead, design mechanical or electromechanical solutions to support device design
Added 26 days ago
H
Senior Firmware Engineer
Humanoid
Vancouver, BC
- $140,000 to $180,000 CAD / year
- Full-time
Strong proficiency in C and C++, with experience using Python for testing or tooling
Added 26 days ago
L
Senior Python Developer with PySpark and AWS
Luxoft
Toronto, ON
- Contract
Advanced proficiency in Python Core and PySpark, with over 8 years of hands-on experience.
Added 26 days ago
ST
Radio Frequency Designer
SignalCraft Technologies Inc.
Calgary, AB
- Full-time
We are seeking an experienced Radio Frequency Designer (Intermediate or Senior) with strong RF and Software Defined Radio expertise. You will help shape system architecture, lead complex…

mthree

Ingénieur Support Mainframe / Mainframe Support Engineer

Montreal, QC, Canada

Full-time

Apply on LinkedIn About employer

Applications open in a new tab.

Job details

Job type: Full-time
Apply by: Nov 13, 2026
Posting language: English · French
Posted: Oct 14, 2026

Original job description

English section of this bilingual listing.

Want to work in technology at an investment bank?

We are looking for someone to be a part of a dynamic team as a Mainframe Support Engineer for one of our clients to support critical production mainframe applications, maintain operational reliability, troubleshoot incidents, and minimize downtime across our client's technology environment.

About mthree:

Since 2010, mthree has been helping clients solve their business and technological challenges. We are a technology and business consultancy with a global workforce delivering significant business and IT projects in some of the largest financial services organizations worldwide.

Core Services

Consulting and Advisory
Managed Services
Alumni Graduate Program
Alumni Pro Program

We have a global presence and are experts in delivering exceptional quality to our client base, providing consulting services across Risk, Regulation & Compliance; Vendor Products; Application Support; Application Development; Cyber & Information Security; Data Science and DevOps areas.

Our Expert program offers experienced professionals access to top roles in tech, finance, aviation and insurance. Join us to work on groundbreaking technology projects, from international trading platforms to critical applications for leading airlines. We recruit professionals who are eager to fast-track their careers in technology or operations within prestigious global organizations.

Responsibilities:

Monitor and manage production technology through alerts, incident resolution, problem management and user escalations.
Troubleshoot issues across applications, software, hardware and networks.
Respond to production tickets, system alerts and job failures.
Lead incident calls with technology and infrastructure teams.
Collaborate with developers and end users to resolve production issues.
Provide real-time recovery/status updates to senior stakeholders.
Identify process improvements in code and data workflows.
Work within a global follow-the-sun support model across Asia, EMEA and North America.
Participate in an on-call rotation, including possible weekend coverage.

Skills Required:

Background in Computer Science equivalent to a B.Sc. Equivalent practical experience is a reasonable substitute.
3-5 years of production support or similar experience.
UNIX/Linux
Shell, Python, Perl or JavaScript
Relational databases such as DB2, SQL, Sybase or PostgreSQL
Mainframe technologies: COBOL, JCL, VSAM, DB2
Debugging and coding production COBOL/DB2 applications.
Incident management and application troubleshooting.
Strong communication and analytical/problem-solving skills.

At mthree, our values support courageous teammates, needle movers, and learning champions all while striving to support the health and well-being of all employees. We take great pride in celebrating the diversity of each individual who contributes to making mthree the company it is today and will be in the future. We value diversity both within mthree and with our partner companies, and we're proud to provide an environment where all our colleagues can flourish. That means promoting a strong culture of equality but, most importantly, inclusion.

Applicants must be currently authorized to work in Canada on a full-time basis. The Company will not sponsor applicants for work visas.

Read the full bilingual original

**English version below**

Doit être local à Montréal

Vous souhaitez travailler dans le domaine de la technologie au sein d'une banque d'investissement?

Nous recherchons un(e) Ingénieur(e) Support Mainframe pour rejoindre une équipe dynamique chez l'un de nos clients. Ce poste consiste à assurer le support des applications mainframe critiques en production, à garantir la fiabilité opérationnelle des systèmes, à diagnostiquer et résoudre les incidents, ainsi qu'à minimiser les temps d'interruption au sein de l'environnement technologique de notre client.

À propos de mtrois :

Depuis 2010, mtrois aide ses clients à résoudre leurs défis commerciaux et technologiques. Nous sommes une société de conseil en technologie et en affaires avec une main-d'œuvre mondiale qui réalise des projets commerciaux et informatiques significatifs dans certaines des plus grandes organisations de services financiers du monde.

Services principaux

Consulting et Conseil
Services gérés
Programme de diplômés Alumni
Programme Alumni Pro

Nous avons une présence mondiale et sommes experts dans la fourniture d'une qualité exceptionnelle à notre base de clients, offrant des services de conseil dans les domaines du risque, de la réglementation et de la conformité ; Produits des fournisseurs ; Support d'application ; Développement d'application ; Cyber et sécurité de l'information ; Science des données et DevOps.

Notre programme Expert offre aux professionnels expérimentés l'accès à des rôles de premier plan dans la technologie, la finance, l'aviation et l'assurance. Rejoignez-nous pour travailler sur des projets technologiques révolutionnaires, des plateformes de trading internationales aux applications critiques pour les principales compagnies aériennes. Nous recrutons des professionnels désireux de faire progresser rapidement leur carrière dans la technologie ou les opérations au sein d'organisations mondiales prestigieuses.

Responsabilités :

Surveiller et gérer les environnements de production technologiques à l'aide d'alertes, de la résolution d'incidents, de la gestion des problèmes et de l'escalade des demandes utilisateurs.
Diagnostiquer et résoudre les incidents liés aux applications, aux logiciels, au matériel informatique et aux réseaux.
Traiter les tickets de production, les alertes système et les échecs de traitements automatisés (jobs).
Animer et coordonner les cellules de crise (incident calls) avec les équipes technologiques et d'infrastructure.
Collaborer avec les développeurs et les utilisateurs finaux afin de résoudre les incidents de production.
Fournir aux parties prenantes et aux responsables seniors des mises à jour en temps réel sur l'état des systèmes et les actions de rétablissement.
Identifier des opportunités d'amélioration des processus dans les flux de données et les développements applicatifs.
Travailler dans un modèle de support mondial « Follow the Sun » couvrant l'Asie, la région EMEA (Europe, Moyen-Orient et Afrique) et l'Amérique du Nord.
Participer à une rotation d'astreinte, pouvant inclure une couverture le week-end.
Ce poste requiert actuellement une présence sur site d'au moins trois jours par semaine

Compétences requises

Formation en informatique de niveau Licence (Bac+3) ou équivalent. Une expérience pratique significative pourra être considérée en remplacement du diplôme.
3 à 5 ans d'expérience en support de production ou dans un poste similaire.
Bonne maîtrise des environnements UNIX/Linux.
Connaissances en scripting et développement : Shell, Python, Perl ou JavaScript.
Expérience des bases de données relationnelles telles que DB2, SQL, Sybase ou PostgreSQL.
Connaissance des technologies Mainframe : COBOL, JCL, VSAM et DB2.
Expérience du débogage, de la maintenance et du développement d'applications de production COBOL/DB2.
Solide expérience en gestion d'incidents et en diagnostic d'applications.
Excellentes compétences en communication, en analyse et en résolution de problèmes.

Chez mtrois, nos valeurs soutiennent des coéquipiers courageux, des moteurs d'aiguilles et des champions de l'apprentissage tout en s'efforçant de soutenir la santé et le bien-être de tous les employés. Nous sommes très fiers de célébrer la diversité de chaque individu qui contribue à faire de mtrois l'entreprise qu'elle est aujourd'hui et sera à l'avenir. Nous valorisons la diversité tant au sein de mtrois qu'avec nos entreprises partenaires, et nous sommes fiers de fournir un environnement où tous nos collègues peuvent s'épanouir. Cela signifie promouvoir une forte culture d'égalité mais, surtout, d'inclusion.

Les candidats doivent être actuellement autorisés à travailler au Canada à temps plein. L'entreprise ne parrainera pas les candidats pour des visas de travail

**English Translation**

**Must be local to Montreal**

Want to work in technology at an investment bank?

About mthree:

Core Services

Consulting and Advisory
Managed Services
Alumni Graduate Program
Alumni Pro Program

Responsibilities:

Monitor and manage production technology through alerts, incident resolution, problem management and user escalations.
Troubleshoot issues across applications, software, hardware and networks.
Respond to production tickets, system alerts and job failures.
Lead incident calls with technology and infrastructure teams.
Collaborate with developers and end users to resolve production issues.
Provide real-time recovery/status updates to senior stakeholders.
Identify process improvements in code and data workflows.
Work within a global follow-the-sun support model across Asia, EMEA and North America.
Participate in an on-call rotation, including possible weekend coverage.
Current posting specifies at least 3 days per week onsite.

Skills Required:

Background in Computer Science equivalent to a B.Sc. Equivalent practical experience is a reasonable substitute.
3-5 years of production support or similar experience.
UNIX/Linux
Shell, Python, Perl or JavaScript
Relational databases such as DB2, SQL, Sybase or PostgreSQL
Mainframe technologies: COBOL, JCL, VSAM, DB2
Debugging and coding production COBOL/DB2 applications.
Incident management and application troubleshooting.
Strong communication and analytical/problem-solving skills.

Applicants must be currently authorized to work in Canada on a full-time basis. The Company will not sponsor applicants for work visas.

Apply on LinkedIn About employer

More about this job

Responsibilities

Monitor and support critical production mainframe applications by responding to alerts, tickets, job failures, and incidents, and troubleshoot issues across applications, software, hardware, and networks. Coordinate incident calls, communicate recovery updates to stakeholders, collaborate with developers and users, and identify process improvements while participating in global follow-the-sun and on-call support.

Requirements

Requires 3–5 years of production support experience and a computer science bachelor's degree or equivalent practical experience. Candidates should have UNIX/Linux and scripting skills, relational database and mainframe experience including COBOL/DB2, and strong incident management, troubleshooting, communication, and analytical skills.

Skills

UNIX/Linux
Shell Scripting
Python
Perl
JavaScript
Relational Databases
DB2
SQL
Sybase
PostgreSQL
COBOL
JCL
VSAM
Production Support
Incident Management
Application Troubleshooting

Visa sponsorship

Not detected in the job text

Keywords

Mainframe Support
Production Support
Incident Management
Problem Management
Application Troubleshooting
UNIX/Linux
Shell Scripting
Python
Perl
JavaScript
Relational Databases
DB2
SQL
Sybase
PostgreSQL
COBOL
JCL
VSAM
Job Scheduling
Production Applications
System Monitoring
Hardware Troubleshooting
Network Troubleshooting
On-Call Support
Follow-the-Sun Support
Investment Banking
Financial Services

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Work requirements

Jobs in Canada