1 to 25 of 37 Network Security Engineer Jobs in London

Role: Network & Security Engineer Rate: Inside IR35 Location: Full time onsite in Harmondsworth, West Drayton Duration: 6-months initially The Role We are looking for Network L2 and L3 admins for one of the major airlines in the UK. This role is customer-facing and requires strong technical hands-on and good communication skills as outlined … OSI layers 1-7, with the ability to apply analytical and troubleshooting skill sets to solve complex problems across all networking disciplines * Monitor the performance and capability of the network using diversified tools. Identify the malfunctioning of hardware, software, and alerts events. * Triage or troubleshoot the issues & incident, within the defined areas. Follow Standard Operating Manuals and coordinate with … resolutions. * Develop strong relationships with the customer and all other support departments. * Experience in supporting the Cisco WLAN Controllers, SSID and Access Points * Experience on Implementing and troubleshooting Firewalls Security, VPN's, NAT policy, Software Patch management * Configuring and troubleshooting routing & switching protocols: Set up and troubleshoot protocols like OSPF, BGP, EIGRP, VLANs, STPs, VRF, MC-LAG, FHRP, DMVPN More ❯

In your role you will support complex network architectures by developing, designing, configuring, and implementing detailed network engineering strategies/solutions that meet and/or exceed capability, flexibility, scalability, performance, and reliability objectives for a variety of large projects, across multiple technologies, within technical area of expertise. You will also provide technical leadership to team/vendor …/contractor resources, ensuring viability of designs, flawless execution, and seamless transition into the production environment. Responsibilities: Independently perform highly complex assignments. Network design, architecture, management, and deployment of new and existing routing and switching within campus, cloud and data center networks. Lead proper execution of network changes & updates in accordance with corporate security policies to meet … business requirements. Responsible for network performance, as well as conformance to security hardening standards and assessment of CVEs. Ability to troubleshoot network-related issues in a logical manner and complete problem resolution management. Research, recommend, and establish innovative solutions for proper capacity planning that scale with the business growth. Where possible, introduce automation for daily routine administrative More ❯

We are seeking an experienced Network and Information Security Engineer to join our team. In this role, you will be responsible for managing and configuration of network equipment (Cisco, Juniper,etc.) , and ensuring the smooth operation of our ZSTACK cloud environment. Key Responsibilities: (1) Strictly abide by the local laws, regulations and company rules and regulations … of the country or region to do the relative network maintenance or information security jobs; 1-3 years of experience in network maintenance, configuration, cyber security and information; Hardworking and quick learning. (2) Experience with the details and practical application of current data protection legislation, and possess an in-depth understanding of the GDPR. (3) Following … the guidance of CTG HQ network and information security department to do the relative jobs, reports, support internal and external networks, including VPN setup, DNS management, AP management, firewall configuration, WAF (e.g. Akaimai),SIEM(e.g. IBM QRada),etc. (4) Familiar with IP network, familiar with Cisco and Juniper, etc. equipment’s maintenance and configuration. (5) Experience with More ❯

We are seeking an experienced Network and Information Security Engineer to join our team. In this role, you will be responsible for managing and configuration of network equipment (Cisco, Juniper,etc.) , and ensuring the smooth operation of our ZSTACK cloud environment. Key Responsibilities: (1) Strictly abide by the local laws, regulations and company rules and regulations … of the country or region to do the relative network maintenance or information security jobs; 1-3 years of experience in network maintenance, configuration, cyber security and information; Hardworking and quick learning. (2) Experience with the details and practical application of current data protection legislation, and possess an in-depth understanding of the GDPR. (3) Following … the guidance of CTG HQ network and information security department to do the relative jobs, reports, support internal and external networks, including VPN setup, DNS management, AP management, firewall configuration, WAF (e.g. Akaimai),SIEM(e.g. IBM QRada),etc. (4) Familiar with IP network, familiar with Cisco and Juniper, etc. equipment’s maintenance and configuration. (5) Experience with More ❯

Job Overview: As a Network Security Engineering team member, the Senior Network Security Engineer will specialise in firewalls and routing. The ideal candidate is a flexible, self-motivated individual who excels at multitasking and thrives in a fast-paced, challenging environment. This self-starter will bring ingenuity and expertise to design, implement, and maintain secure … scalable, high-performing network solutions that connect on-premises and public cloud environments. The role emphasizes driving automation through Infrastructure-as-Code (IaC) and GitOps methodologies, ensuring optimal network performance, and integrating robust security measures. Responsibilities: Network Design and Implementation: Design and implement secure, scalable, and high-performing network solutions bridging on-premises and public … cloud environments. Leverage routing and switching expertise (e.g., BGP, OSPF, MPLS) to ensure network performance and reliability across diverse environments. Analyze operational needs and proactively develop creative network solutions to address security challenges. Security and Firewall Management: Manage firewall configurations for the CyberEnergianetwork based on operational requirements. Develop and implement network security tools, produce More ❯

Job Title: Senior Network Engineer Delivery & Migrations Location: England (Home based with client visits across England). Salary: Up to £55,000 basic salary plus great benefits package Sector: Consultancy/Solution Provider The Company Our client is a professional services consultancy who specialise in providing businesses with software defined solutions, network assurance, network automation and … interesting projects in both the public and private sectors. Technology Partners Cisco/Meraki VM Ware Palo Alto Fortinet Juniper Aruba/HPE Microsoft AWS Role Snapshot As Senior Network Security Engineer you be an integral member of the delivery and migrations team. The role will entail assisting with migrations, day-to-day delivery tasks and providing … looking to take a step up from a BAU role, with the ambition to widen their remit in projects and delivery. Key Responsibilities Assisting with delivery and migration of network, data centre and security solutions. Provide exceptional customer services. Contribute to knowledge centre and keep documentation up to date. Be willing to work in a vendor agnostic environment More ❯

and resilient technology solutions. Our team builds and maintains robust infrastructure that safeguards OpenAI's data and systems while ensuring employees are well-equipped and seamlessly connected. By prioritizing security, reliability, and user-centric solutions, we empower OpenAI employees to drive impactful AI research, corporate operations, and product innovation. About the Role As a Network Security Engineer at OpenAI, you will play a critical role in architecting and maintaining both campus and cloud network infrastructure. You will design and implement secure, scalable, and high-performing network solutions that bridge on-premises environments with public cloud environments. Your expertise in routing and switching will ensure optimal network performance and reliability across diverse environments. You … will drive automation initiatives through Infrastructure-as-Code (IaC) and GitOps methodologies, streamlining network provisioning, enforcing configuration consistency, and optimizing IT workflows. Your responsibilities will also include developing CI/CD pipelines tailored for IT infrastructure, enhancing deployment efficiency, and integrating robust network security measures. You will establish comprehensive observability and proactive issue resolution strategies. We are More ❯

Network Security Engineer Location: London (Moorgate) | 4 Days Onsite Salary: Competitive + Excellent Benefits A global energy and commodities business is seeking a Network Security Engineer to join their London-based team. This is an exciting opportunity to work in a technically complex, security-driven environment supporting a wide range of infrastructure and … network technologies. Key Responsibilities: Manage and maintain Checkpoint firewalls and Cisco network infrastructure Support Cisco ISE solutions Manage Data Centre colocation and vendor relationships Contribute to IT security prevention and awareness initiatives Essential Experience: Deep technical knowledge of Checkpoint firewalls, Cisco routers/switches, and Cisco ISE Experience with Zscaler (ZIA/ZPA), Splunk Strong understanding of … IT security practices Cisco CCNA/CCNP certification or equivalent Desirable Experience: Background in supporting Windows Server, Linux, Active Directory, and Exchange Familiarity with VMware, VxRail, Rubrik, and backup/recovery processes Exposure to CUCM, LogicMonitor, Mimecast, Okta, and other security tools Benefits Package Includes: Competitive salary (up to £72,000 depending on experience) 10% employer pension contribution More ❯

Mid-Level Network Security Engineer Location: London (Moorgate) | 4 Days Onsite Per Week Salary: Competitive + Excellent Benefits A global energy and commodities business is seeking a Network Security Engineer to join their London-based team. This is an exciting opportunity to work in a technically complex, security-driven environment supporting a wide … range of infrastructure and network technologies. Key Responsibilities: Manage and maintain Checkpoint firewalls and Cisco network infrastructure Support Cisco ISE and Zscaler Internet/Private Access solutions Manage Data Centre colocation and vendor relationships Contribute to IT security prevention and awareness initiatives Essential Experience: Deep technical knowledge of Checkpoint firewalls, Cisco routers/switches, and Cisco ISE … Experience with Zscaler (ZIA/ZPA), Splunk Strong understanding of IT security practices Cisco CCNA/CCNP certification or equivalent Desirable Experience: Background in supporting Windows Server, Linux, Active Directory, and Exchange Familiarity with VMware, VxRail, Rubrik, and backup/recovery processes Exposure to CUCM, LogicMonitor, Mimecast, Okta, and other security tools Benefits Package Includes: Competitive salary (up More ❯

Job Title: Network & Security Engineer (12-Month Contract) Location: Stockley Park (Hybrid) Contract Length: 12 Months Positions Available: Between 10 and 20 Client: Leading Retail Company Alchemy Recruitment is proud to partner with a renowned retail organisation undergoing significant digital transformation. As part of this initiative, we are seeking 10-20 experienced Network & Security Engineers … to join their team on a 12-month contract basis . Role Overview: As a Network & Security Engineer, you will play a critical role in maintaining and enhancing the security and reliability of the organisation’s network infrastructure. You’ll be working in a fast-paced environment, supporting large-scale retail operations and contributing to … strategic technology initiatives. Key Responsibilities: Design, implement, and maintain secure network solutions (LAN/WAN, VPNs, firewalls, etc.) Monitor network performance and security systems to detect and respond to threats Support incident response efforts and troubleshoot complex network/security issues Collaborate with IT teams to ensure compliance with security policies and standards Contribute More ❯

Job Title: Network & Security Engineer (12-Month Contract) Location: Stockley Park (Hybrid) Contract Length: 12 Months Positions Available: Between 10 and 20 Client: Leading Retail Company Alchemy Recruitment is proud to partner with a renowned retail organisation undergoing significant digital transformation. As part of this initiative, we are seeking 10-20 experienced Network & Security Engineers … to join their team on a 12-month contract basis. Role Overview: As a Network & Security Engineer, you will play a critical role in maintaining and enhancing the security and reliability of the organisation’s network infrastructure. You’ll be working in a fast-paced environment, supporting large-scale retail operations and contributing to strategic … technology initiatives. Key Responsibilities: Design, implement, and maintain secure network solutions (LAN/WAN, VPNs, firewalls, etc.) Monitor network performance and security systems to detect and respond to threats Support incident response efforts and troubleshoot complex network/security issues Collaborate with IT teams to ensure compliance with security policies and standards Contribute to More ❯

Senior Network Engineer with Security and Cisco - City London Our Client urgently requires a Senior Network Engineer with heavy background in Network Security on Cisco and Microsoft. The security and support of the company's network is paramount. Predominately a support role (BAU) with design of scalable solutions deliverable through projects. … solutions from perimeter to DMZ roles -Support IPS deployment for Europeanbranches -Develop, maintain and deliver global standards to all networking devices -Remediate Penetration Test results -Ensure seamless migration of network estate to newly adopted security framework General Skills -Experience working within mission-critical environments -Experience in operational deployments -Datacentre cabling and racking of equipment Technical Skills you need … multi-layer switches and routers, including 6500s -CISCO certification, ideally CCNP -CISCO CSM -VLAN segregation -McAfee HIPS, Trend Micro -Centralised authentication service (AAA) -SafeNet Ethernet Encryptor -RADIUS/RSA -Security certification (advantageous) You will also need to an understanding of the following technologies: VLAN segregation. DMZ. VSS. Failover. OSPF. High availability. CISCO. Palo Alto. Juniper. McAfee IPS. SafeNet. Tripwire. More ❯

Role Overview Seeking an experienced Senior Network Engineer with deep expertise in multi-vendor networking and security solutions. Required Skills and Experience Proven expertise in F5 LTM, including load balancing concepts, iRules development, and VIP configuration. Strong background with Fortinet security solutions, especially FortiGate firewall and FortiManager configuration and policy deployment. Hands-on experience with Juniper … SRX firewalls and EX switches. Proficiency with Cisco Nexus 7k switches and Cisco ISE for network access control. Solid understanding of routing, switching, and network documentation standards. Excellent problem-solving, communication, and documentation skills. More ❯

Role Overview Seeking an experienced Senior Network Engineer with deep expertise in multi-vendor networking and security solutions. Required Skills and Experience Proven expertise in F5 LTM, including load balancing concepts, iRules development, and VIP configuration. Strong background with Fortinet security solutions, especially FortiGate firewall and FortiManager configuration and policy deployment. Hands-on experience with Juniper … SRX firewalls and EX switches. Proficiency with Cisco Nexus 7k switches and Cisco ISE for network access control. Solid understanding of routing, switching, and network documentation standards. Excellent problem-solving, communication, and documentation skills. More ❯

Network Security Engineer - Cisco/Juniper/Fortinet/F5 My client, a leading name in the technology space, is looking for an experienced Network Security Engineer to join their team on an initial 6-month contract. This is a key role supporting a complex enterprise environment, requiring strong technical knowledge across both networking … and security domains. Required Skills & Experience: You don't need expertise in all technologies listed below, but strong skills in at least one or more of the following areas are essential: F5 LTM (Local Traffic Manager) Akamai CDN and security solutions Fortinet FortiGate firewalls & FortiManager Juniper SRX firewalls and switches Cisco ISE - for RADIUS and network access … control Cisco Nexus 7000 series switches In addition, you'll bring: Proven experience with Access Control Lists (ACLs), network segmentation, and perimeter security best practices A solid understanding of Layer 2 and Layer 3 networking, and core routing protocols such as BGP and OSPF Experience with high availability networking setups Strong troubleshooting ability using packet capture and log More ❯

society. Our workplace embraces diversity and inclusion - it's a place where you can grow, belong and thrive. Your day at NTT DATA We are currently looking for a Network and Security Engineer to join our talented Technical Services team in Luxembourg. We invite to apply anyone who can make daily operational changes and troubleshooting in medium … to complex secure network infrastructures, while developing a trusted relationship with our clients. The primary function of the role is to work closely with our clients, mostly onsite in Luxembourg, to support them in their operations, improving their infrastructures and processes, and solving production incidents. As an engineer, you will also be involved in implementation projects, configuration changes … and technical advisory. What you'll be doing As a Network and Security Engineer, you will: support the client's operations and apply appropriate troubleshooting methodology in the context of changes, incidents and projects, create technical documentation - procedures, network device configs, migration plans, instructions for technicians, test scenarios be responsible for implementation of Network and More ❯

Job Title: Network Security Engineer Location: Seattle, WA Job Description: We are looking for a skilled Network Security Engineer with expertise in Cisco technologies to join our team in Seattle, WA. As a Network Security Engineer, you will be responsible for designing, implementing, and maintaining secure network infrastructures to protect … our organization's data and systems from cyber threats. Key Responsibilities: - Design, implement, and maintain network security measures to protect organization's data and systems - Monitor network traffic for potential security breaches and respond appropriately to incidents - Conduct regular security audits and vulnerability assessments to identify and address security risks - Collaborate with cross-functional … teams to implement security policies and procedures - Provide technical support and guidance to IT staff on network security best practices - Stay up-to-date on latest security trends and technologies to continuously improve network security measures Qualifications: - Bachelor's degree in Computer Science, Engineering, or related field - 3+ years of experience in network More ❯

Job Title: Network Security Engineer Location: Seattle, WA Job Description: We are looking for a skilled Network Security Engineer with expertise in Cisco technologies to join our team in Seattle, WA. As a Network Security Engineer, you will be responsible for designing, implementing, and maintaining secure network infrastructures to protect … our organization's data and systems from cyber threats. Key Responsibilities: - Design, implement, and maintain network security measures to protect organization's data and systems - Monitor network traffic for potential security breaches and respond appropriately to incidents - Conduct regular security audits and vulnerability assessments to identify and address security risks - Collaborate with cross-functional … teams to implement security policies and procedures - Provide technical support and guidance to IT staff on network security best practices - Stay up-to-date on latest security trends and technologies to continuously improve network security measures Qualifications: - Bachelor's degree in Computer Science, Engineering, or related field - 3+ years of experience in network More ❯

Network & Security Engineer – Financial Services – £80k + Hybrid (Central London) Permanent | Hybrid (2-3 days in Central London) Our client, a leading player in the financial services sector, is seeking a skilled Network & Security Engineer to join their growing team. This is a permanent opportunity offering up to £80,000 , with hybrid working arrangements … based in Central London . Key Responsibilities Design, implement, and support robust network infrastructure across multiple global sites. Manage multicast routing for market data distribution across complex environments involving multiple VRFs and VLANs. Configure and maintain Aruba (Access/Distribution) and Arista (Core/Low-Latency) switches. Support BGP peering, route filtering, and optimisation for ultra-low-latency trading … environments. Operate and maintain Palo Alto firewalls, GlobalProtect VPNs, and ZScaler security platforms (ZIA/ZPA). Support VMware SD-WAN (VeloCloud) deployments across branch and remote trading locations. Monitor and optimise network performance (latency, throughput, availability) on critical links. Assist with network automation initiatives and maintain accurate documentation. Required Skills & Experience Deep hands-on experience with More ❯

Network & Security Engineer – Financial Services – £80k + Hybrid (Central London) Permanent | Hybrid (2-3 days in Central London) Our client, a leading player in the financial services sector, is seeking a skilled Network & Security Engineer to join their growing team. This is a permanent opportunity offering up to £80,000 , with hybrid working arrangements … based in Central London . Key Responsibilities Design, implement, and support robust network infrastructure across multiple global sites. Manage multicast routing for market data distribution across complex environments involving multiple VRFs and VLANs. Configure and maintain Aruba (Access/Distribution) and Arista (Core/Low-Latency) switches. Support BGP peering, route filtering, and optimisation for ultra-low-latency trading … environments. Operate and maintain Palo Alto firewalls, GlobalProtect VPNs, and ZScaler security platforms (ZIA/ZPA). Support VMware SD-WAN (VeloCloud) deployments across branch and remote trading locations. Monitor and optimise network performance (latency, throughput, availability) on critical links. Assist with network automation initiatives and maintain accurate documentation. Required Skills & Experience Deep hands-on experience with More ❯

Package (or equivalent) | Hybrid Working] Embrace the opportunity to be a pivotal part of a forward-thinking company, renowned for its collaborative ethos and commitment to excellence. As a Network Security Engineer, your expertise will be instrumental in maintaining the integrity and advanced capabilities of our client’s network systems. Your role will focus on leveraging … automation and standardisation to keep their network infrastructure at the industry's leading edge... Key Responsibilities Assess firewall policies against security benchmarks and business needs Collaborate with the Cyber Security team to address threats and vulnerabilities Implement and manage firewall policies, coordinating with various stakeholders Analyse network traffic and audit logs for issue resolution Partner with … Network Engineering for DMZ designs and deployments, with a special focus on F5 and load balancing solutions Enhance team performance through supporting tasks and fostering continuous improvement What You Bring... 4+ years of expertise in firewall configuration and troubleshooting, with a strong emphasis on F5 and load balancing technologies Comprehensive understanding of network security concepts, systems, and More ❯

Package (or equivalent) | Hybrid Working] Embrace the opportunity to be a pivotal part of a forward-thinking company, renowned for its collaborative ethos and commitment to excellence. As a Network Security Engineer, your expertise will be instrumental in maintaining the integrity and advanced capabilities of our client’s network systems. Your role will focus on leveraging … automation and standardisation to keep their network infrastructure at the industry's leading edge... Key Responsibilities Assess firewall policies against security benchmarks and business needs Collaborate with the Cyber Security team to address threats and vulnerabilities Implement and manage firewall policies, coordinating with various stakeholders Analyse network traffic and audit logs for issue resolution Partner with … Network Engineering for DMZ designs and deployments, with a special focus on F5 and load balancing solutions Enhance team performance through supporting tasks and fostering continuous improvement What You Bring... 4+ years of expertise in firewall configuration and troubleshooting, with a strong emphasis on F5 and load balancing technologies Comprehensive understanding of network security concepts, systems, and More ❯

Network Security Engineer 2-3 month Contract London (Hybrid) £335/day Outside IR35 Network Security Engineer required for an initial 2–3 month rolling contract, with an immediate start — ideally available by July 2025. This role is primarily remote, with occasional travel to a client site in London. A chance to work with … an established global IT and Digital transformation consultancy for an end client in the Telecoms domain. Key Skills and experience: Strong network security skill set including Checkpoint firewalls (NGFW) and F5 load balancers (BIG-IP) Proficient in configuring, managing, and troubleshooting Checkpoint firewalls and security policies Hands-on experience with F5 BIG-IP for load balancing, application … delivery, and traffic management In-depth knowledge of Cisco LAN/WAN environments (routers, switches, ASA, Catalyst, Nexus) Extensive experience in networking and security , including migration , configuration , and troubleshooting Expert-level knowledge of network architecture and security solutions , ensuring minimal disruption during transitions Proven ability to lead and assist in network infrastructure migrations Skilled in configuring More ❯

Infrastructure Security Engineer - Application/Network experience We are currently recruiting for a Infrastructure Security Engineer on a 6 month initial contract. Hybrid basis (2-3 days), office location being London. They are looking for a candidate to take responsibility for leading, guiding, supporting and delivering secure architectural design for the group cyber security maturity programme. They are also looking for a candidate who is able to provide advice and recommendations for the programme. Key Skills Information Security Management System (Infrastructure Security Operations). Azure cloud infrastructure and configuration. System Centre Configuration Manager, Operations Manager and Virtual Machine Manager. Microsoft Exchange online Azure and on-premises Active Directory Cyber Incident Management … and or Security Forensic experience. Windows Server and Linux Network (WAN, Wi-Fi) and Network Access Control (NAC) management Cloud email security gateway services Server hardware including and CIS controls. Security monitoring, orchestrator and SEIM tools Next-gen application firewalls, anti-malware, cloud proxies and CASB Please apply! Carbon60, Lorien & SRG - The Impellam Group STEM More ❯

A fast-growing hedge fund is building its technology stack from the ground up and seeking a Cloud Network & Security Engineer to take ownership of its cloud networking and security infrastructure. As a Cloud-First, Multi-Cloud company leveraging AWS & Azure, they need an expert to design, secure, and optimize their cloud network architecture. This … is a unique opportunity to build and define the network for a cloud-first hedge fund. If you're a driven Network Engineer looking to make a real impact, apply now! Key Responsibilities: This is a blend of design, implementation, and support, giving you the chance to shape and build the network from scratch. You'll … be responsible for: Designing and delivering cloud-based and on-prem network and security solutions Working with Palo Alto Networks (essential), Cisco, or Arista Supporting a multi-cloud (AWS & Azure) and on-prem data center environment Collaborating with the Senior Technology stake-holders to define and implement best practices Helping build low-latency and high-performance networking (HFT More ❯