This position is listed on behalf of a partner company, who manages all applications and next steps. Our partner is looking for a Mainframe z/OS Systems Programmer based in Canada. This role offers the opportunity to design, maintain, and optimize critical technology infrastructure supporting large-scale business operations.You will act as a key technical expert responsible for ensuring system availability, reliability, security, and performance.The position combines hands-on systems administration, troubleshooting, automation, and infrastructure improvement initiatives.You will collaborate with technology teams, business stakeholders, vendors, and partners to deliver resilient solutions.Working in a complex enterprise environment, you will help modernize infrastructure while maintaining operational excellence.This is an ideal opportunity for an experienced infrastructure professional who enjoys solving complex technical challenges and driving continuous improvement.