Senior Network Security Engineer McKesson is an impact-driven, Fortune 10 company that touches virtually every aspect of healthcare. We are known for delivering insights, products, and services that make quality care more accessible and affordable. Here, we focus on the health, happiness, and well-being of you and those we serve we care. What you do at McKesson matters. We foster a culture where you can grow, make an impact, and are empowered to bring new ideas. Together, we thrive as we shape the future of health for patients, our communities, and our people. If you want to be part of tomorrow's health today, we want to hear from you. We are seeking a highly experienced Senior Network Security Engineer with a strong background in Palo Alto Networks, Zscaler security platforms, and XSOAR automation. The ideal candidate will have 710 years of hands-on experience architecting, implementing, and automating enterprise-grade security solutions to protect both on-premises and cloud-based environments. This role is critical in leading our next-generation network security initiatives with a strong focus on automation, Zero Trust architecture, and advanced threat protection. Key Responsibilities: Architect, deploy, and manage Palo Alto Next-Generation Firewalls (NGFW), including Panorama. Design and enforce Zero Trust Network Access (ZTNA) leveraging Zscaler Internet Access (ZIA) and Zscaler Private Access (ZPA). Develop and maintain automated workflows using XSOAR (Cortex XSOAR) to accelerate incident response, threat hunting, and operational tasks. Integrate Palo Alto, Zscaler, and other security platforms with SOAR/SIEM systems (e.g., Cortex XSOAR, Splunk, Sentinel). Lead firewall rulebase reviews, segmentation projects, and policy optimizations using automation tools. Collaborate with IT, cloud, and DevSecOps teams to secure infrastructure in hybrid environments. Analyze and respond to security events, alerts, and incidents in real time, escalating when necessary. Create and maintain detailed documentation for architecture, runbooks, and playbooks. Contribute to security architecture design, threat modeling, and risk assessment processes. Minimum Requirements 710 years of hands-on experience in network or security engineering roles. Required Skills & Experience Deep expertise with Palo Alto firewalls, including deployment, troubleshooting, and policy optimization. Proven experience with Zscaler ZIA/ZPA configuration and policy management. Hands-on experience with Cortex XSOAR (ZSOAR) or equivalent SOAR platforms. Strong understanding of Zero Trust principles, segmentation, identity-based access control, and SASE. Proficiency in automation and scripting (e.g., Python, REST APIs, Ansible). Solid grasp of network protocols (TCP/IP, BGP, VPN, DNS) and enterprise security technologies (IDS/IPS, proxies, SSL inspection). Experience with cloud security integration (Azure, AWS, or GCP) is a strong plus. Excellent analytical and troubleshooting skills, with the ability to work under pressure. Preferred Certifications: PCNSE Palo Alto Networks Certified Network Security Engineer ZCCA-IA / ZCCA-PA Zscaler Certified Cloud Administrator (Internet/Private Access) Cortex XSOAR Certified Automation Engineer (preferred) We are proud to offer a competitive compensation package at McKesson as part of our Total Rewards. This is determined by several factors, including performance, experience and skills, equity, regular job market evaluations, and geographical markets. The pay range shown below is aligned with McKesson's pay philosophy, and pay will always be compliant with any applicable regulations. In addition to base pay, other compensation, such as an annual bonus or long-term incentive opportunities may be offered. Our Base Pay Range for this position $144,600 - $241,000 McKesson is an Equal Opportunity Employer. McKesson provides equal employment opportunities to applicants and employees and is committed to a diverse and inclusive environment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, protected veteran status, disability, age or genetic information.