Senior Network Security Architect in Mississauga

Design secure hybrid-cloud networks at McKesson using Zero Trust, segmentation, and secure access strategies across enterprise environments. Shape resilient infrastructure as a senior individual contributor. McKesson seeks a Senior Network Security Specialist to advance network security architecture across hybrid-cloud and on-premises environments. You will establish technical standards, reduce attack surfaces, and translate operational and regulatory needs into practical designs. The work includes architecture reviews, emerging technology evaluation, and network visibility improvements. Key Responsibilities:

Design hybrid-cloud and on-premises architectures using Zero Trust principles Lead architecture reviews, risk assessments, and design validation Develop reusable security patterns, standards, and technical documentation Partner with architecture, infrastructure, security, and operations teams Provide technical leadership during incidents and root cause analysis Requirements:

Seven or more years in network engineering Enterprise network architecture and security design experience Hands-on firewall policy design, configuration, administration, and optimization Experience with segmentation, micro-segmentation, or secure network design Bachelor’s degree or equivalent relevant education and experience Apply network architecture, Zero Trust, and security design expertise to strengthen McKesson’s enterprise connectivity and resilience.

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