4,337 IT Security jobs in the United Kingdom

• Design, implement, and maintain network security infrastructure (firewalls, IDS/IPS, VPNs).
• Monitor network traffic for security threats and suspicious activities.
• Conduct vulnerability assessments, penetration testing, and security audits.
• Develop and execute incident response plans.
• Analyze security breaches and provide post-incident reports and recommendations.
• Implement and manage access control policies and identity management systems.
• Stay updated on the latest cybersecurity threats and mitigation strategies.
• Collaborate with IT teams to ensure the security of network systems and data.
• Develop and enforce security policies and procedures.

• Bachelor's degree in Computer Science, Cybersecurity, or a related field, or equivalent experience.
• Minimum of 5 years of experience in network security or cybersecurity operations.
• In-depth knowledge of network protocols and security technologies.
• Hands-on experience with firewall management, IDS/IPS, and VPN configuration.
• Familiarity with security frameworks and best practices (e.g., NIST, ISO 27001).
• Experience with vulnerability scanning and penetration testing tools.
• Strong analytical and problem-solving skills.
• Excellent communication and interpersonal skills.
• Relevant certifications such as CISSP, CCNA Security, or GIAC are highly desirable.
• Ability to work independently and manage responsibilities effectively in a remote setting.

• Designing, implementing, and managing network security solutions, including firewalls, VPNs, IDS/IPS, and access control systems.
• Monitoring network traffic for security breaches and suspicious activities.
• Conducting regular security assessments, vulnerability scans, and penetration tests.
• Developing and enforcing security policies and procedures.
• Responding to security incidents and developing incident response plans.
• Ensuring compliance with relevant security standards and regulations.
• Collaborating with IT teams to implement security best practices across all systems.
• Staying up-to-date with the latest cybersecurity threats and technologies.
• Providing technical expertise and support on network security matters.
• The successful candidate will possess a Bachelor's degree in Computer Science, Information Technology, or a related field, or equivalent practical experience. Certifications such as CISSP, CCNA Security, or CompTIA Security+ are highly desirable. A minimum of 3-5 years of experience in network security or a related cybersecurity role is required. Proficiency in network protocols, operating systems (Windows, Linux), and security tools is essential. Strong analytical and problem-solving skills, excellent communication abilities, and the capacity to work independently in a remote environment are crucial. Join our client in their mission to safeguard their digital assets, working from anywhere in the UK in this dynamic and vital role. This is a fantastic opportunity for a cybersecurity professional to make a significant impact.

• Design, deploy, and maintain network security infrastructure, including firewalls, intrusion detection/prevention systems (IDS/IPS), VPNs, and secure network architectures.
• Monitor network traffic for suspicious activities and security breaches, performing in-depth analysis and incident response.
• Develop and implement security policies, standards, and procedures to ensure compliance and best practices.
• Conduct regular security assessments, vulnerability scans, and penetration testing to identify and remediate security weaknesses.
• Manage security technologies, including endpoint security, SIEM solutions, and cloud security controls.
• Develop and maintain security documentation, including network diagrams, security plans, and incident response playbooks.
• Provide expert guidance and support to IT teams on security-related matters.
• Stay updated on the latest cybersecurity threats, vulnerabilities, and defensive technologies.
• Contribute to the development and implementation of the organisation's overall cybersecurity strategy.

• Bachelor's degree in Computer Science, Information Technology, Cybersecurity, or a related field.
• Minimum of 7 years of experience in network security engineering and cybersecurity operations.
• Proven expertise in designing and managing enterprise-level network security solutions.
• Strong knowledge of TCP/IP, routing protocols, firewalls, IDS/IPS, VPNs, and other network security technologies.
• Experience with cloud security concepts (e.g., AWS, Azure) is highly desirable.
• Proficiency in security information and event management (SIEM) tools and security analytics.
• Excellent analytical, problem-solving, and incident response skills.
• Strong understanding of security frameworks (e.g., NIST CSF) and compliance requirements.
• Relevant security certifications such as CISSP, CCNA Security, CCNP Security, or GIAC are highly preferred.
• Exceptional communication and collaboration skills for effective remote teamwork.

Network Security Engineer (SEA – Security Engineering Authority, Firewall, Checkpoint, Juniper, F5)

6 Month Contract

West Midlands (Hybrid)

£(Apply online only)/day (Outside IR35)

SEA – Security Engineering Authority Senior Network Security Designer/ Lead Engineer needed with active SC Security Clearance Firewall Specialist .                            6 Month Contract based in Warwick (Hybrid). Start ASAP in September/October.

Network Security Lead Engineer / Security Engineering Authority SEA (Firewall Specialist – Checkpoint, Juniper, F5, Bluecoat)

The vast majority of work is expected to be remote. There may be occasional travel to customer sites to Data Centres in West/South England. Once or twice a month on average.

Working with a global IT Consultancy on large-scale network solutions projects for a Telecoms end client.

Key skills, experience + tasks will include:

• Technical Ownership of a Telecoms end client's Network Security Infrastructure estate, processes, documentation + lifecycle management .
li>Design of customer networks including input into High-Level and Low-Level design (HLD/LLD).
• Network Security Engineer / Security Engineering Authority SEA (Firewall Specialist – Checkpoint, Juniper, F5, Bluecoat)
< i>Acting as the technical point of contact for all Network Security related projects, changes and modifications, including firewall rules base.
• Point of escalation and link to vendor support for Network Security infrastructure incidents.
• Technical Environment: Strong experience Checkpoint, Juniper, Bluecoat, F5 , Cisco networking, Cisco IPT / QoS / 802.1x, switches, wireless, Inflobox DNS, SSL VPN, DMVPN, IPsec, WAN, routing protocols.
• Technical support, change management (physical/remote), customer inventory management, EOL, hardware, software.
• Ensures designs and implementations comply with enterprise security policies, standards, and regulatory requirements.
• SC Security Clearance is essential for this contract.

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.

Description

The Network Security Consultant will provide delivery leadership within the Professional Services consultancy team primarily aligned to clients in the USA region. This client-facing role includes the following responsibilities.

Personal/General

Maintain day to day records of project work to allow accurate billing and reporting of consultancy time;

• Maintain effective network of business contacts within Verizon and their partner community;
li>Maintain and grow their own knowledge to ensure this maintains fully relevant to the network security services practice and its clients;
• Have strong presentation and written/verbal communications skills at multiple levels of an organization;
• Have a minimum of 5+ years of network security consulting, design and delivery experience.
  As a Network Security Consultant you will bring –

Technical expertise with very strong skills in most of the technologies below:

< i>Firewalls: Checkpoint, Juniper, Palo Alto, Cisco ASA/FTD, Fortinet;
• Proxy Services: Bluecoat (forward/reverse proxy), Zscaler;
• Load Balancers: F5 (LTM/GTM);
• IDP/IPS: FirePower/Sourcefire IPS/IDS, McAfee
• Identity & Access Management: Cisco ISE, Aruba Clearpass policy manager;
• Routing & Switching : (CCNP/CCNA level), and good knowledge of SD-WAN deployments;
• Good understanding of key technologies such as: VRF, dynamic routing (EIGRP/BGP/OSPF), MPLS, DMVPN, GRE, IPSec VPN
• Remote Access VPN: GlobalProtect, Pulse Secure, Cisco AnyConnect;
• Knowledge of Cloud deployments (Azure/AWS/GCP);
• Experience with building, maintaining, reviewing all configurations/settings/policies on chosen technologies;
• Experience of multi-vendor, managed outsourcing environments;
• Experience working with operational environments following ITIL frameworks;
• Excellent documentation and presentation skills;
• Excellent troubleshooting skills (technical and non-technical);
• Ability to review processes and procedures – and improve them;
< i>Experience participating in network & system security projects to provide:
• Business requirements analysis and support for Solutions Architects;
• Production of detailed infrastructure designs including physical and virtual aspects of security components;
• Migration of complex legacy infrastructures to new managed security services platforms;
• Understanding and demonstrable experience working in an Agile environment and actively participating in a Scrum team;
• Experience using Jira to help define user stories, tasks and associated estimates.

It is likely that you will have gained some of the following professional qualifications:

• CCNA/CCNP (Enterprise/Security/Data Center);
  CISSP or equivalent;
• Palo Alto (PCNSA/PCNSE);
• Checkpoint (CCSA/CCSE);
• Fortinet (NSE)

Network Security Engineer (SEA – Security Engineering Authority, Firewall, Checkpoint, Juniper, F5)

6 Month Contract

West Midlands (Hybrid)

£(Apply online only)/day (Outside IR35)

SEA – Security Engineering Authority Senior Network Security Designer/ Lead Engineer needed with active SC Security Clearance Firewall Specialist .                            6 Month Contract based in Warwick (Hybrid). Start ASAP in September/October.

Network Security Lead Engineer / Security Engineering Authority SEA (Firewall Specialist – Checkpoint, Juniper, F5, Bluecoat)

The vast majority of work is expected to be remote. There may be occasional travel to customer sites to Data Centres in West/South England. Once or twice a month on average.

Working with a global IT Consultancy on large-scale network solutions projects for a Telecoms end client.

Key skills, experience + tasks will include:

• Technical Ownership of a Telecoms end client's Network Security Infrastructure estate, processes, documentation + lifecycle management .
li>Design of customer networks including input into High-Level and Low-Level design (HLD/LLD).
• Network Security Engineer / Security Engineering Authority SEA (Firewall Specialist – Checkpoint, Juniper, F5, Bluecoat)
< i>Acting as the technical point of contact for all Network Security related projects, changes and modifications, including firewall rules base.
• Point of escalation and link to vendor support for Network Security infrastructure incidents.
• Technical Environment: Strong experience Checkpoint, Juniper, Bluecoat, F5 , Cisco networking, Cisco IPT / QoS / 802.1x, switches, wireless, Inflobox DNS, SSL VPN, DMVPN, IPsec, WAN, routing protocols.
• Technical support, change management (physical/remote), customer inventory management, EOL, hardware, software.
• Ensures designs and implementations comply with enterprise security policies, standards, and regulatory requirements.
• SC Security Clearance is essential for this contract.