Senior Network Security Engineer

xAI; Ashington; On-site; GBP 70,000 - 110,000; Full time

Benefits offered by this job

Health insurance

Life and AD&D insurance

Flexible vacation

Visa sponsorship

401(k) plan

Job summary

xAI in the United Kingdom seeks a seasoned Senior Network Security Engineer to join our security team. You will serve as SME in network security, specializing in firewalls, VPNs, IDS/IPS, and routing/switching, shaping enterprise security posture and incident response.

You will deploy new devices, update configurations, monitor cloud network traffic across AWS, GCP, Azure, and on‑prem, and drive changes with documentation and change control.

Qualifications

• Certifications like CISA, CRISC, CGEIT, Security+ or similar preferred.
• Familiarity with scripting languages for automation of network security tasks.
• Strong understanding of TCP/IP, VLANs, ACLs and secure routing/switching practices.
• Experience with multi-cloud environments and IaC tools like Terraform.

Responsibilities

• Serve as SME in network security, particularly firewalls, VPNs, IDS/IPS, and routing protocols.
• ,
• Manage and update firewall configurations across our enterprise network.
• Deploy new firewalls, switches, routers, and network devices as needed.
• Develop and propose innovative network security solutions for routing and switching.

Skills

Firewall management

VPNs

IDS/IPS

Routing protocols

Switching technologies

Scripting (Python, Bash)

Cloud security

Network analysis (Wireshark/tcpdump)

Vendor devices (Cisco/Juniper/PAN)

Education

Bachelor’s degree in Computer Science/Cybersecurity/Information Systems

Tools

Wireshark

tcpdump

Cisco

Juniper

Palo Alto Networks

Terraform

Job description

• We are seeking a seasoned Senior Network Security Engineer to join our dynamic security team
• Serve as a subject matter expert in network security, particularly firewalls, VPNs, IDS/IPS, routing protocols (e.g., BGP, OSPF), and switching technologies
• Manage and update firewall configurations across our enterprise network to align with operational and security needs
• Deploy new firewalls, switches, routers, and network security devices in response to evolving threats and demands
• Develop and propose innovative network security solutions to address operational challenges in routing and switching environments
• Enhance security processes through thorough documentation and change management
• Act as the primary resolver for complex network security issues, including escalation support
• Ensure network security systems, switches, and routers are up-to-date with patches, firmware, and maintenance
• Monitor and respond to security events in cloud environments (e.g., AWS, GCP, Azure, Datacenter), with emphasis on network traffic analysis

Benefits

• Health and wellness: Comprehensive health insurance including medical, dental, vision, and disability coverage
• Life and family: Life and AD&D insurance and fertility benefits to ensure our team’s well-being and peace of mind
• Flexible vacation: We work hard but avoid burn out. Take time off when you need it
• Visa sponsorship: We support international talent with visa sponsorship to join our team
• 401(k) plan: Retirement savings plan to secure your financial future

Certifications like CISA, CRISC, CGEIT, Security+, CASP+, or similar preferredFamiliarity with scripting languages (e.g., Python, Bash) for automation of network security tasksStrong understanding of network security principles, protocols (e.g., TCP/IP, VLANs, ACLs), and best practices for secure routing and switchingExperience with network analysis tools such as Wireshark, tcpdump; and vendors including Cisco, Juniper, Palo Alto NetworksProficiency in at least one major cloud platform (AWS, GCP, or Azure) and its network security services (e.g., VPCs, Security Groups)4+ years of experience in network security engineering, with hands‑on focus on switching and routingBachelor’s degree in Computer Science, Cybersecurity, Information Systems, or a related fieldTo conform to U.S. Government export regulations, applicant must be a (i) U.S. citizen or national, (ii) U.S. lawful, permanent resident (aka green card holder), (iii) Refugee under 8 U.S.C. § 1157, or (iv) Asylee under 8 U.S.C. § 1158, or be eligible to obtain the required authorizations from the U.S. Department of State. Learn more about the ITAR hereYou will thrive in a fast-paced, challenging environment, demonstrating adaptability, excellent multitasking skills, and the drive to tackle complex security issues independently while ensuring robust protection for our innovative technologiesThe ideal candidate will possess deep expertise in network security technologies, focusing on switching and routing systems within cloud-native and AI-focused infrastructureInterest in leveraging AI for network threat detection and automationContributions to open-source projects in network security or related toolsExperience in multi-cloud environments and Infrastructure as Code tools like Terraform for network provisioningRelevant network-specific certifications (e.g., CCNP Security, CCIE Security, JNCIP-SEC, PCNSE)Knowledge of DevSecOps practices tailored to network security integrationExperience building custom tools or integrations for enhancing network security operations