Thermo Fisher Scientific

Senior Mainframe Developer

📍 Location
Ottawa, Ontario
⏰ Job Type
Full time
📅 Posted
July 20, 2026
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Job Description

  • 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 troublesho...
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