Lead Zero Trust architecture and Palo Alto firewall engineering at McKesson in a hybrid or work from home arrangement based on business needs. Build secure infrastructure across cloud, data center, and hybrid environments.
This senior network security engineering role guides enterprise architecture, implementation, and governance. You will apply segmentation, secure access technologies, threat detection, and network traffic analysis. The work supports scalable, resilient, and compliant network services for critical business operations.
Key Responsibilities: Design secure network architectures using Zero Trust principles
Develop network segmentation and micro-segmentation strategies
Review security architecture and recommend infrastructure modernization
Manage Palo Alto firewalls and security policies




Support Zscaler, ZTNA, VPN, NAC, and IDS/IPS technologies
Requirements: Seven-plus years in network security or related engineering roles
Bachelor's degree or equivalent education and experience
Enterprise network security architecture design experience
Enterprise firewall administration, including Palo Alto Networks
Zero Trust, segmentation, secure access, and traffic analysis experience
Apply senior network security expertise across Palo Alto firewalls, Zero Trust architecture, segmentation, and secure enterprise connectivity at McKesson.

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📌 Senior Network Security Engineer Firewall (Ontario)
🏢 McKesson
📍 Ontario