WAF & Network Security Engineer – Cloud Focus

Mckesson Corporation; Cork; On-site; EUR 53,000 - 88,000; Full time

Job summary

McKesson is seeking a Network Security Engineer (WAF) to protect our global technology environment by designing, implementing and optimising security controls across cloud and on‑premises platforms. You will work closely with infrastructure, application, and cybersecurity teams to secure internet-facing apps, strengthen network security controls, and reduce organisational risk.

You will also contribute to incident response, risk reduction initiatives, and the continuous improvement of McKesson’s

Qualifications

• 4+ years of experience implementing and supporting enterprise network security technologies, including firewalls, WAFs, or IPS.
• Experience configuring and managing Web Application Firewall (WAF) solutions to protect internet-facing applications and APIs.
• Experience designing, implementing, and maintaining firewall rules, network segmentation controls, and access management policies in enterprise environments.
• Strong understanding of TCP/IP networking, application traffic flows, DNS, HTTP/HTTPS, and network security architecture principles.
• Experience analysing network traffic, security logs, and security events to support investigations, threat detection, and incident response activities.
• Experience assessing security risks, validating security control effectiveness, and identifying opportunities to improve security posture.
• Strong documentation skills with experience creating technical documentation, security standards, procedures, and configuration records.

Responsibilities

• Design, implement, and maintain Web Application Firewall (WAF) protections for internet-facing applications, including custom security policies, rate limiting, geo-blocking, and threat detection rules.
• Develop and manage network security controls, including firewall policies, network segmentation, ingress and egress controls, and secure access configurations.
• Partner with application, infrastructure, and engineering teams to understand application architectures, traffic flows, and business requirements, ensuring security controls are both effective and operationally sustainable.
• Analyse network traffic, security events, and application behaviour to identify risks, investigate security concerns, and improve detection capabilities.
• Evaluate, implement, and optimise security technologies and controls to enhance protection against vulnerabilities, emerging threats, and unauthorised access.
• Support incident response, forensic investigations, vulnerability remediation activities, and disaster recovery planning by providing technical security expertise.
• Document security architectures, configurations, procedures, and standards while promoting security best practices across technology teams.

Skills

WAF experience

Enterprise network security

Firewalls

TCP/IP networking

Incident response

Security documentation

Education

Bachelor’s degree or equivalent in related field

Tools

WAF solutions

AWS

Azure

Job description

McKesson is seeking a Network Security Engineer (WAF) to protect our global technology environment by designing, implementing and optimising security controls across cloud and on‑premises platforms. You will work closely with infrastructure, application, and cybersecurity teams to secure internet-facing apps, strengthen network security controls, and reduce organisational risk.

You will also contribute to incident response, risk reduction initiatives, and the continuous improvement of McKesson’s