Lead the design, development, testing, implementation, and maintenance of applications using COBOL, CICS, JCL, VSAM, IDMS and SORT utilities Own and drive end-to-end delivery of projects, enhancements, defects, and production fixes, ensuring quality, timeliness, and business alignment Analyze business requirements and translate them into scalable, maintainable, and reliable technical solutions Prepare technical design documents, impact assessments, implementation plans, data flow analysis, and interface specifications Collaborate with business stakeholders to understand requirements, identify risks, and propose practical and strategic solutions Mentor and guide junior and intermediate developers, conduct code reviews, and promote engineering standards and best practices Act as a trusted technical resource for application knowledge, design guidance, code quality, troubleshooting, and delivery risk management Lead troubleshooting, root-cause analysis, and resolution of complex production issues, ensuring minimal business impact Lead or contribute to modernization and integration initiatives, including impact assessment, interface design, data flow analysis, API or middleware integration, and safe migration strategies Participate in and support release planning, deployment, post-production validation, and operational readiness activities Participate in an on-call support rotation, including occasional weekends or off-hours Ensure adherence to development standards, documentation, security, audit, and compliance requirements Collaborate effectively with global teams, including onshore, offshore, business, QA, infrastructure, architecture, support, and cross-functional partners Proactively identify risks, dependencies, technical debt, and opportunities to improve system stability, delivery effectiveness,



and team capability Required Qualifications Bachelor''s Degree holder with 8+ years of hands-on Mainframe application development experience Strong hands-on expertise in:COBOLCICSJCLVSAMIDMS/DB2SORT utilities Excellent understanding of designing and developing applications in Mainframe technologies Strong experience supporting both batch and online mainframe applications Strong solutioning mindset with ability to design and implement technical solutions Demonstrated ownership mindset with the ability to work through ambiguity, proactively identify risks, and drive issues to closure Ability to quickly learn complex legacy applications, business processes, data flows, and integration points Willing to provide application support as needed and on rotation Ability to collaborate with multiple business teams and solve complex issues Strong analytical and problem-solving abilities Excellent communication, collaboration, and stakeholder-management skills Experience with enterprise systems integration Knowledge of security best practices and compliance requirements Ability to work independently and as part of a distributed team Strong team orientation with the ability and willingness to mentor team members and raise overall team capability Preferred Qualifications Exposure to RPG Experience with Lotus Notes application development or support Understanding of API development, integration, or modernization strategies Experience with MQ, middleware, file-transfer patterns, or enterprise integration approaches Familiarity with Agile/Scrum methodologies Experience working inorder management, fulfillment,



supply chain, finance, or other high-volume transactional systems Strong experience in production support and incident management Experience with tools such as TSO/ISPF, File-AID, Xpediter, Endevor, Changeman, Control-M, CA7, or similar mainframe development and scheduling tools Experience working with globally distributed teams, including onshore, offshore, and cross-functional delivery partners Work Setting Location: Ottawa, Canada Work Model: Hybrid work model with a combination of onsite and remote work, as defined by team and business needs Support Expectations: Participation in a shared on-call rotation, including occasional weekends or off-hours support What Success Looks Like The successful candidate will: Successfully leads projects and delivers high-quality, scalable, and maintainable solutions Provides effective design solutions aligned with business needs, system architecture, and long-term technology direction Acts as a technical mentor and go-to person for application knowledge, design guidance, code quality, troubleshooting, and delivery risk management Demonstrates strong leadership, ownership and accountability in delivery and production support Engages proactively withbusiness stakeholders and adds value in discussions Quickly learns complex systems, business processes, and technical dependencies Identifies risks, technical debt, and improvement opportunities before they become delivery or production issues Continuously learns, explores new approaches, and drives problem-solvinginitiatives Contributes to team success, system stability, and modernization efforts Supports a positive, collaborative, and team-first culture by sharing knowledge, mentoring others, and helping the team succeed Compensation The estimated annualized pay range for this position in Ontario is $85,$114,

📌 Senior Mainframe Developer (Ottawa)
🏢 Thermo Fisher Scientific
📍 Ottawa