1,963 Network Security jobs in the United Kingdom

• Monitor network traffic and systems for security breaches, anomalies, and vulnerabilities using SIEM tools.
• Implement and manage firewalls, intrusion detection/prevention systems (IDS/IPS), VPNs, and other security technologies.
• Conduct regular vulnerability assessments and penetration testing to identify weaknesses.
• Develop and enforce security policies, standards, and procedures across the organization.
• Respond to and investigate security incidents, developing containment and eradication strategies.
• Manage security awareness training programs for employees.
• Stay abreast of the latest cybersecurity threats, trends, and technologies.
• Collaborate with IT teams to ensure security is integrated into all system designs and deployments.
• Maintain accurate documentation of network security configurations and incident reports.
• Participate in disaster recovery and business continuity planning.

• Proven experience in network security, cybersecurity operations, or a related IT security role.
• Strong knowledge of TCP/IP, routing protocols, network segmentation, and network architecture.
• Hands-on experience with security tools such as firewalls (e.g., Palo Alto, Cisco ASA), IDS/IPS, SIEM (e.g., Splunk, ELK Stack), and endpoint security solutions.
• Familiarity with common cyberattack vectors and mitigation techniques.
• Relevant certifications such as CompTIA Security+, CISSP, CCNA Security, or GIAC.
• Excellent analytical and problem-solving skills.
• Strong communication skills, with the ability to explain complex technical concepts to non-technical audiences.
• Ability to work independently and manage priorities in a remote setting.
• Bachelor's degree in Computer Science, Information Technology, Cybersecurity, or a related field, or equivalent practical experience.

• Designing, implementing, and managing network security solutions, including firewalls, IDS/IPS, VPNs, and endpoint security.
• Monitoring network traffic and system logs for security breaches and suspicious activities.
• Conducting vulnerability assessments and penetration tests to identify and mitigate security risks.
• Responding to and investigating security incidents, providing timely resolution and post-incident analysis.
• Developing and updating network security policies, procedures, and guidelines.
• Configuring and maintaining security infrastructure across various network environments.
• Staying current with emerging security threats, vulnerabilities, and technologies.
• Collaborating with IT teams to ensure the security of all network infrastructure and systems.
• Providing security awareness training to staff.
• Ensuring compliance with relevant data protection regulations and industry standards.

Team purpose

We are here to change lives through better sight and hearing by delivering outstanding value, being loved by every customer and creating the place where all colleagues are proud to belong as we grow our business.

The Network Platform team will own and develop (with the Enterprise Architecture team) the strategic network roadmap. Delivering changes, product development and maintenance required to achieve the objectives of the roadmaps. The team will also provide support and technical expertise in the case of a major incident. They work closely with third-party partners to deliver a safe, resilient, robust Network Platform and continuously review the industry and market, testing new concepts and technologies that can add value.

Your purpose

The Network Security Engineer supports the Lead Network Security Engineer in delivering the Network Security Roadmap. This role supports the implementation of Infosec-driven initiatives and acts as the second line of escalation for Network Security Incidents and ad hoc service and portfolio support requests. This role is accountable for establishing and maintaining secure network configurations, including firewalls, routers, switches, and VPNs, and periodically reviewing firewall rules and user access to the network. The Network Security Engineer focuses on continuous improvement through automation and tooling, working with Security Operations to monitor and analyse network traffic for malicious activity or potential breaches. Additionally, this role implements network access controls, enforces robust patch management for network devices, and works with network security partners to identify network vulnerabilities, planning and implementing upgrades to ensure the highest standards of network security.

This role is required to participate in an on-call rota for out-of-hours escalations for the Global Network Team.

Your role

• Support Network Security Roadmap: Assist in delivering the Network Security Roadmap.

• Subject Matter Expertise: Provide network subject matter expertise on Infosec-driven initiatives.

• Incident Escalation: Second line of escalation for network security incidents, as well as specific security Service and Portfolio Requests i.e. Meraki configuration and firewall changes.

• On Call Rota: Participate in on-call rota and occasionally work out of regular business hours to facilitate change management and incident resolution.

• Secure Network Configurations: Establish and maintain secure network configurations including Cisco Meraki and Palo Alto firewalls, routers, switches, and VPNs.

• Firewall and Access Review: Periodically review firewall rules and user access to the network.

• Continuous Improvement: Focus on continuous improvement through automation and tooling.

• Monitoring and Analysis: Collaborate with Security Operations to monitor and analyse network traffic for malicious activity or potential breaches.

• Access Controls: Implement network access controls to ensure only authorised users and devices can access specific network segments.

• Vulnerability and Patch Management: Identify and manage the remediation of network vulnerabilities and upgrades to ensure the highest standards of network security. This includes vulnerability management of the store Meraki estate. Perform robust patch management for network devices.

• IT Values Commitment: Champion and commit to performing the role within recognised Values & Behaviours.

What you'll bring

• Advanced Expertise in network solutions including MPLS, Internet, Cloud services, Firewalls, Routers, switches, Palo Alto, Meraki, and Cisco services.

• Bachelor's degree in relevant field and/or industry recognised certifications i.e. Cisco Certified Network Associate (CCNA).

• Proficiency in establishing secure network configurations, including firewalls, routers, switches, and VPNs.

• Experience with network access controls, vulnerability and patch management.

• Experience in implementing network-security solutions.

• Excellent verbal and written communication skills to articulate technical concepts to both technical and non-technical stakeholders.

• Expertise in monitoring and analysing network performance and incidents.

• Previous experience participating in on-call rotations and managing out-of-hours incidents effectively.

• Strong analytical skills to assess complex technical problems and develop effective solutions.

• Expertise in troubleshooting and resolving network security-related issues.

• Ability to work closely with cross-functional teams, including architecture, infosec and regional implementation teams.

• Dedication to performing the role within recognised values and behaviours.

Summer-Browning Associates is currently supporting our public sector client, who is seeking a Network Security Engineer for an initial twelve-month assignment with the option to extend.

Location: Hybrid working - Kidlington or Southampton

About the role: You will be responsible for day-to-day operation and control of all aspects of the client's sites and local area communications network infrastructure including Voice.

The ideal candidate will hold Active SC and have a strong background in delivery Network & Security support, with the following skills and experience:

• Experience with Checkpoint, Fortinet, Cisco & Solarwinds.
• Knowledge of IT and Voice Networks.
• Holds a recognised IT Networking qualification, or equivalent experience.
• Knowledge of Networking protocols & standards.

Network Security Engineer - Global Tech Operations
Location: Basingstoke (Hybrid - 3 days per week on-site)
Salary: 50,000-55,000 + excellent benefits

Join a business undergoing transformation, where you'll have the opportunity to shape how security and networking are delivered across a global, high-integrity environment. This is a great opportunity for an experienced Network Engineer with a strong troubleshooting mindset and a growing interest in cybersecurity tools and processes.

This isn't a rinse-and-repeat support desk role. You'll work on critical infrastructure, be trusted with important decisions, and have the chance to grow in both technical breadth and depth. With a new leadership team in place and investment in tooling underway, it's a great time to join.

What you'll be doing

You'll be supporting and improving complex networks and core infrastructure systems across a secure production environment. Day to day, you'll be configuring switches and firewalls, monitoring performance, investigating issues at network and transport layers, and helping maintain and evolve the organisation's security stack-including Defender XDR, SentinelOne, and iBoss. You'll work closely with infrastructure and security colleagues to help cross-train and provide joined-up support.

What you'll bring

• Strong hands-on experience with switching, firewalls, VPNs and WAN/LAN/WLAN support
• Knowledge of routing protocols (e.g., OSPF, BGP, RIP) and QoS techniques
• Experience with Cisco or HP networking tech (CLI preferred), plus Check Point or similar firewalls
• Familiarity with tools such as Microsoft Defender XDR, Sentinel, iBoss, Cisco ISE or Secure Access
• Awareness of vulnerability management, threat prevention, and SOC tooling
• Ability to investigate and troubleshoot under pressure with a methodical, root-cause approach
• Previous experience in an ITIL-aligned environment

Why this role?

• Be part of a newly integrated team where you'll gain exposure to both networking and security
• Work with a fantastic line manager and a team that values mutual learning
• Enjoy a varied, hands-on role with real autonomy-where your ideas for improvement will be heard
• Help support a transformation as the business invests in tooling, process and capability

You'll get 26 days' holiday, private health insurance, life cover, pension, flexible working (3 days onsite), and the opportunity to work in a collaborative, no-blame culture with global reach.

Due to the nature of the organisation, you will need to pass a security vetting process.

Team purpose

We are here to change lives through better sight and hearing by delivering outstanding value, being loved by every customer and creating the place where all colleagues are proud to belong as we grow our business.

The Network Platform team will own and develop (with the Enterprise Architecture team) the strategic network roadmap. Delivering changes, product development and maintenance required to achieve the objectives of the roadmaps. The team will also provide support and technical expertise in the case of a major incident. They work closely with third-party partners to deliver a safe, resilient, robust Network Platform and continuously review the industry and market, testing new concepts and technologies that can add value.

Your purpose

The Network Security Engineer supports the Lead Network Security Engineer in delivering the Network Security Roadmap. This role supports the implementation of Infosec-driven initiatives and acts as the second line of escalation for Network Security Incidents and ad hoc service and portfolio support requests. This role is accountable for establishing and maintaining secure network configurations, including firewalls, routers, switches, and VPNs, and periodically reviewing firewall rules and user access to the network. The Network Security Engineer focuses on continuous improvement through automation and tooling, working with Security Operations to monitor and analyse network traffic for malicious activity or potential breaches. Additionally, this role implements network access controls, enforces robust patch management for network devices, and works with network security partners to identify network vulnerabilities, planning and implementing upgrades to ensure the highest standards of network security.

This role is required to participate in an on-call rota for out-of-hours escalations for the Global Network Team.

Your role

• Support Network Security Roadmap: Assist in delivering the Network Security Roadmap.

• Subject Matter Expertise: Provide network subject matter expertise on Infosec-driven initiatives.

• Incident Escalation: Second line of escalation for network security incidents, as well as specific security Service and Portfolio Requests i.e. Meraki configuration and firewall changes.

• On Call Rota: Participate in on-call rota and occasionally work out of regular business hours to facilitate change management and incident resolution.

• Secure Network Configurations: Establish and maintain secure network configurations including Cisco Meraki and Palo Alto firewalls, routers, switches, and VPNs.

• Firewall and Access Review: Periodically review firewall rules and user access to the network.

• Continuous Improvement: Focus on continuous improvement through automation and tooling.

• Monitoring and Analysis: Collaborate with Security Operations to monitor and analyse network traffic for malicious activity or potential breaches.

• Access Controls: Implement network access controls to ensure only authorised users and devices can access specific network segments.

• Vulnerability and Patch Management: Identify and manage the remediation of network vulnerabilities and upgrades to ensure the highest standards of network security. This includes vulnerability management of the store Meraki estate. Perform robust patch management for network devices.

• IT Values Commitment: Champion and commit to performing the role within recognised Values & Behaviours.

What you'll bring

• Advanced Expertise in network solutions including MPLS, Internet, Cloud services, Firewalls, Routers, switches, Palo Alto, Meraki, and Cisco services.

• Bachelor's degree in relevant field and/or industry recognised certifications i.e. Cisco Certified Network Associate (CCNA).

• Proficiency in establishing secure network configurations, including firewalls, routers, switches, and VPNs.

• Experience with network access controls, vulnerability and patch management.

• Experience in implementing network-security solutions.

• Excellent verbal and written communication skills to articulate technical concepts to both technical and non-technical stakeholders.

• Expertise in monitoring and analysing network performance and incidents.

• Previous experience participating in on-call rotations and managing out-of-hours incidents effectively.

• Strong analytical skills to assess complex technical problems and develop effective solutions.

• Expertise in troubleshooting and resolving network security-related issues.

• Ability to work closely with cross-functional teams, including architecture, infosec and regional implementation teams.

• Dedication to performing the role within recognised values and behaviours.

Network Security Engineer - Global Tech Operations
Location: Basingstoke (Hybrid - 3 days per week on-site)
Salary: 50,000-55,000 + excellent benefits

Join a business undergoing transformation, where you'll have the opportunity to shape how security and networking are delivered across a global, high-integrity environment. This is a great opportunity for an experienced Network Engineer with a strong troubleshooting mindset and a growing interest in cybersecurity tools and processes.

This isn't a rinse-and-repeat support desk role. You'll work on critical infrastructure, be trusted with important decisions, and have the chance to grow in both technical breadth and depth. With a new leadership team in place and investment in tooling underway, it's a great time to join.

What you'll be doing

You'll be supporting and improving complex networks and core infrastructure systems across a secure production environment. Day to day, you'll be configuring switches and firewalls, monitoring performance, investigating issues at network and transport layers, and helping maintain and evolve the organisation's security stack-including Defender XDR, SentinelOne, and iBoss. You'll work closely with infrastructure and security colleagues to help cross-train and provide joined-up support.

What you'll bring

• Strong hands-on experience with switching, firewalls, VPNs and WAN/LAN/WLAN support
• Knowledge of routing protocols (e.g., OSPF, BGP, RIP) and QoS techniques
• Experience with Cisco or HP networking tech (CLI preferred), plus Check Point or similar firewalls
• Familiarity with tools such as Microsoft Defender XDR, Sentinel, iBoss, Cisco ISE or Secure Access
• Awareness of vulnerability management, threat prevention, and SOC tooling
• Ability to investigate and troubleshoot under pressure with a methodical, root-cause approach
• Previous experience in an ITIL-aligned environment

Why this role?

• Be part of a newly integrated team where you'll gain exposure to both networking and security
• Work with a fantastic line manager and a team that values mutual learning
• Enjoy a varied, hands-on role with real autonomy-where your ideas for improvement will be heard
• Help support a transformation as the business invests in tooling, process and capability

You'll get 26 days' holiday, private health insurance, life cover, pension, flexible working (3 days onsite), and the opportunity to work in a collaborative, no-blame culture with global reach.

Due to the nature of the organisation, you will need to pass a security vetting process.

Summer-Browning Associates is currently supporting our public sector client, who is seeking a Network Security Engineer for an initial twelve-month assignment with the option to extend.

Location: Hybrid working - Kidlington or Southampton

About the role: You will be responsible for day-to-day operation and control of all aspects of the client's sites and local area communications network infrastructure including Voice.

The ideal candidate will hold Active SC and have a strong background in delivery Network & Security support, with the following skills and experience:

• Experience with Checkpoint, Fortinet, Cisco & Solarwinds.
• Knowledge of IT and Voice Networks.
• Holds a recognised IT Networking qualification, or equivalent experience.
• Knowledge of Networking protocols & standards.