Senior Security Engineer & Incident Response Leader

F5 Networks, Inc.; Addlestone; Hybrid; GBP 90,000 - 142,000; Full time

Job summary

F5 Networks, Inc. is seeking a Principal Security Engineer to provide expert security leadership for the SIRT organization. The role demands deep knowledge of incident handling, attack analysis, and vulnerability management across F5 products and services.

The ideal candidate mentors others, researches emerging threats, and communicates impact and mitigations clearly to customers. Ability to work with incomplete information and adapt to changing priorities is essential.

Qualifications

• Minimum 15 years of experience in a technical security role such as support, monitoring or consulting (e.g. pen testing) with relevant technologies.
• Expert knowledge of CVE, CPE, CVSS, and widely used security frameworks (NIST).
• Proven ability to lead security initiatives, mentor staff, and present to management and customers.

Responsibilities

• Lead PSIRT and vulnerability management, monitoring CVEs and vendor notifications.
• Coordinate security advisories with product engineering, legal, and communications.
• Provide incident handling, attack analysis, and mitigation options for customers.

Skills

Security incident handling

Threat & vulnerability management

Incident response planning

Threat intelligence

Mentoring/training

Public cloud (AWS/Azure/GCP)

Network security

Web Application Firewall knowledge

Python scripting

UNIX/Linux command line

Education

BA/BS degree in a technical field

Tools

Siebel

Kubernetes

Docker

Terraform

Ansible

Job description

F5 Networks, Inc. is seeking a Principal Security Engineer to provide expert security leadership for the SIRT organization. The role demands deep knowledge of incident handling, attack analysis, and vulnerability management across F5 products and services.

The ideal candidate mentors others, researches emerging threats, and communicates impact and mitigations clearly to customers. Ability to work with incomplete information and adapt to changing priorities is essential.