Network Security Engineer

Take your network security expertise to the next level. Are you passionate about cybersecurity, network visibility, and advanced threat detection? Do you enjoy working with complex technical environments, exploring new security technologies and ensuring that organisations have the visibility they need to defend against evolving cyber threats? This is an opportunity to put your expertise to work in a highly technical Cyber Security Operations Centre (CSOC), supporting the operation and continuous improvement of enterprise-level cyber defence capabilities. As a Network Security Engineer, you will play an important role in managing and enhancing the technologies that enable security teams to monitor network activity, identify potential threats and maintain visibility across large, distributed network environments. You will work with advanced security monitoring and packet capture technologies, including Cisco Firepower, Corelight and NetWitness, while collaborating with experienced cybersecurity professionals, security analysts and engineering teams. If you enjoy combining hands-on technical expertise, infrastructure engineering and cybersecurity, this role offers an exciting opportunity to expand your capabilities and contribute to sophisticated cyber defence operations. What makes this opportunity interesting?
• Work with advanced cybersecurity technologies: Gain hands-on exposure to enterprise security monitoring, network visibility, packet capture and traffic analysis platforms.
• Take on technically challenging environments: Work across large-scale, distributed networks, multiple sites and data centres, solving complex networking and security monitoring challenges.
• Make a meaningful contribution to cyber defence: Help improve network visibility, strengthen threat detection capabilities and ensure security teams have access to reliable and accurate telemetry.
• Expand your technical expertise: Develop your knowledge of security infrastructure, platform optimisation, SIEM/SOAR integrations and enterprise network architectures.
• Collaborate with cybersecurity specialists: Work alongside technical experts, security analysts, detection engineering teams and international stakeholders.
• Grow your career: Strengthen your specialisation in network security engineering, cyber defence infrastructure and enterprise security monitoring. Your Role & Impact You will play an active role in ensuring security monitoring platforms remain reliable, scalable, optimised, and able to support evolving cyber defence requirements. 1. Enterprise Security Monitoring & Technology Management
• Manage and maintain enterprise-level security monitoring and network visibility platforms.
• Deploy, configure, upgrade, maintain and manage the lifecycle of security monitoring and packet capture solutions.
• Work with technologies such as Cisco Firepower, Corelight and NetWitness.
• Monitor platform health, availability, performance, data quality, storage utilisation and data retention.
• Investigate and resolve technical issues involving Linux, network connectivity, packet flows and data collection.
• Maintain technical documentation, architecture diagrams, inventories and operational procedures.
• Identify network visibility gaps and recommend improvements to monitoring capabilities. 2. Network Visibility & Cyber Defence Improvements
• Contribute to the design and enhancement of network security monitoring solutions.
• Improve network traffic visibility and security telemetry collection across distributed environments.
• Support integrations between monitoring platforms, SIEM, SOAR, analytics and incident management systems.
• Participate in capacity planning, performance optimisation and scalability assessments.
• Identify opportunities to improve platform reliability, operational efficiency and threat detection capabilities.
• Support cybersecurity compliance, audits and technical assurance activities. 3. Infrastructure Projects & Technical Collaboration
• Provide specialist expertise in network monitoring, packet capture, traffic aggregation and network visibility.
• Contribute to security infrastructure deployments, upgrades, migrations and service transitions.
• Participate in site surveys, cabling activities and physical infrastructure deployment planning.
• Coordinate maintenance activities and work with technology vendors to resolve technical issues.
• Collaborate with security operations teams and technical stakeholders to communicate platform performance, operational risks and improvement opportunities.
• Participate in cyber defence exercises and contribute to wider security initiatives. Technologies & Technical Environment You will work with a range of enterprise security and networking technologies, including:
• Security Monitoring: Cisco Firepower, Corelight and NetWitness.
• Network Visibility: Network Packet Brokers (NPB), traffic aggregation and packet capture technologies.
• Cybersecurity Operations: Network security monitoring, threat detection, threat hunting and security telemetry.
• Infrastructure: Linux environments, enterprise networking, network protocols and distributed architectures.
• Security Integration: SIEM, SOAR, analytics and incident management platforms. What will help you succeed? We are looking for a technically driven professional who enjoys working with complex network security environments and takes ownership of the performance and reliability of security monitoring platforms. Education & Professional Experience
• A Bachelor's degree in IT, Computer Science, Cybersecurity, Telecommunications, or a related discipline, with at least 2 years of relevant professional experience.
• Alternatively, candidates without a university degree must demonstrate at least 6 years of extensive and progressive relevant professional experience. Technical Expertise
• Strong knowledge of network security monitoring and cyber defence operations.
• Extensive hands-on experience managing large-scale, distributed security monitoring environments across multiple networks, sites or data centres.
• Enterprise-level experience with security monitoring and packet capture platforms, particularly Cisco Firepower, Corelight and NetWitness.
• Strong understanding of network visibility technologies, network packet brokers, traffic aggregation and packet capture.
• Experience monitoring platform health, performance, capacity and data quality, including troubleshooting and optimisation.
• Advanced understanding of enterprise networking, protocols, architectures and data flows.
• Practical Linux administration and network troubleshooting experience.
• Understanding of security telemetry collection, event correlation, threat detection and threat hunting.
• Experience with physical network infrastructure deployments, cabling and site surveys. Personal Attributes
• Strong analytical thinking and problem-solving capabilities.
• Excellent communication and stakeholder collaboration skills.
• Ability to work independently while contributing effectively to multidisciplinary technical teams.
• Professional proficiency in English. Security Requirements This position requires eligibility to obtain and maintain the appropriate level of security clearance, in accordance with the applicable organisational and national security requirements. Candidates with existing government, defence or international security clearances are encouraged to apply. Bring your technical expertise, curiosity, and passion for cybersecurity. Apply today and take the next step in your network security career