1 to 25 of 30 Senior Network Engineer Jobs in the South East

Senior Network Engineer - Cisco, CCNA, CCNP, CCIE x multiple opportunities Location: London – Hybrid (2 days in-office) Salary: £60,000 - £70,000 DOE + Bonus, Healthcare, Pension, Training Must be UK based and eligible to live and work in the UK. About the Company Join a fast … training and certifications from leading vendors, including hands-on experience with Cisco ISE, DNA Centre, SD-Access, and other advanced networking technologies. The Role: Senior Network Engineer As a network engineer, you’ll play a crucial role in managing and maintaining enterprise-level network environments. Your primary focus will be network monitoring, network management, escalated troubleshooting, and incident resolution, ensuring optimal performance and minimal downtime for clients. You’ll have full ownership of the network infrastructure, providing high-level support and proactive problem-solving while collaborating on key projects. Key More ❯

per annum (Discretionary range to £65,675) Post Type:Full time/Permanent Closing Date:28/05/2025 Ref No 11544 Documents Senior Network Engineer JD - Diamond-II V1.0.docx (Word , 51.41kb) Senior Network Engineer PS - Diamond-II V1.0.docx (Word , 40.62kb) About Us … treatments for disease to innovative engineering and cutting-edge technology. World class science requires world class computing infrastructure. Our Scientific Computing team provides computing network and storage systems that keep Diamond and its scientists at the forefront of scientific research About the Role We now have an excellent opportunity … for a Senior Network Engineer within Diamond's Scientific Computing team to support and develop the scientific and controls networks used for cutting edge science. High bandwidth ethernet forms the basis of all the critical networks within Diamond alongside more specialist low latency fabrics. These enable rapid More ❯

Senior Network Engineer 📍 Location: Cosham, Portsmouth (Hybrid – Mostly remote, 2-3 days/month in office) 🕐 Employment Type: Permanent 💼 Salary: £55,000 to £60,000 DOE, with on-call bonuses (£300/week + 1.5x pay for time worked) About the Company: Join a leading IT infrastructure … solutions provider, where innovation and expertise drive success. Our team supports global clients with cutting-edge network technologies, ensuring reliability, security, and performance. As part of our dynamic network engineering team, you’ll play a key role in maintaining and advancing critical network infrastructures while working in … a flexible, collaborative environment. Role Overview: As a Senior Network Engineer , you’ll take ownership of the day-to-day support, optimisation, and project delivery for our clients’ networks. You’ll troubleshoot complex issues, design scalable solutions, and mentor junior engineers—all while working with top-tier More ❯

Senior Network Engineer 📍 Location: Cosham, Portsmouth (Hybrid – Mostly remote, 2-3 days/month in office) 🕐 Employment Type: Permanent 💼 Salary: £55,000 to £60,000 DOE, with on-call bonuses (£300/week + 1.5x pay for time worked) About the Company: Join a leading IT infrastructure … solutions provider, where innovation and expertise drive success. Our team supports global clients with cutting-edge network technologies, ensuring reliability, security, and performance. As part of our dynamic network engineering team, you’ll play a key role in maintaining and advancing critical network infrastructures while working in … a flexible, collaborative environment. Role Overview: As a Senior Network Engineer , you’ll take ownership of the day-to-day support, optimisation, and project delivery for our clients’ networks. You’ll troubleshoot complex issues, design scalable solutions, and mentor junior engineers—all while working with top-tier More ❯

Senior Network Engineer – London (Hybrid) - £75,000 - £100,000 + Bonus + Benefits We’re looking for a skilled Senior Network Engineer to join our clients dynamic team. In this role, you’ll design, implement, and maintain critical networking infrastructure while driving automation and … efficiency. Key Responsibilities: Oversee the design, implementation, and maintenance of Cisco ACI infrastructure. Develop automation solutions for network tasks using Python, Ansible, and Terraform. Engineer and support enterprise-grade network systems, including Cisco routers, Nexus data centre switches, and wireless LAN controllers. Configure and manage Palo Alto … firewalls, ensuring adherence to robust security standards. Deploy and administer network access control solutions with Cisco ISE (802.1x and TACACS). Optimise uptime and performance using F5 Big-IP load balancers. Design and manage advanced routing solutions with protocols such as BGP and OSPF, as well as SD-WAN More ❯

Senior Network Engineer Location: London Salary: £200,000-£250,000 Role Overview: Seeking a Senior Network Engineer to lead the design, implementation, and management of high-performance network solutions, with a focus on research infrastructure combining AWS cloud services and advanced data center … platforms. Key Responsibilities: Network Architecture : Design and deploy scalable network solutions, including core switching, firewalls, load balancers, and automation frameworks. Full Lifecycle Management : Oversee network lifecycle from design through deployment, operation, and retirement. Automation & IaC : Utilize Infrastructure as Code (IaC) and automation to streamline network delivery. … computing environments. Vendor Expertise : Leverage expertise in Cisco, Arista, Juniper, and NVIDIA products to drive architecture decisions. Qualifications: Proven experience in complex, high-performance network architecture. Strong focus on software-driven, agile methodologies. Expert knowledge of vendor ecosystems and emerging networking technologies. More ❯

Role: Senior Network Engineer Salary: £36,000 Location: Kings Hill/Hybrid Why Join Cantium? Cantium Business Solutions is a dynamic and innovative company, committed to providing high-quality back-office services to our customers. With a strong focus on customer-centric solutions, we are continually growing … empowered to make a difference. As part of the Connectivity Services team, you'll play a key role in shaping the future of our network and security infrastructure services. What You’ll Bring: Extensive experience in managing and configuring network and security infrastructure, including Cisco switches and routers … and AP’s). Expertise in cloud networks, particularly Azure, with hands-on experience supporting and configuring cloud-based infrastructure. Strong skills in using network management tools (e.g., SolarWinds) for performance monitoring, troubleshooting, and reporting. Proven experience in mentoring and coaching junior engineers, with a focus on team development More ❯

Job Title: Senior Network Engineer (Contract) Location: Milton Keynes (Hybrid 1 day a week) Rate: 650 - 750 per day DOE (Inside IR35) Overview: The Senior Network Engineer is responsible for managing the full lifecycle of active network components, ensuring that network solutions … are delivered at pace, standardized, scalable, supportable, and secure. This role requires expertise in various network engineering domains, as well as leadership in guiding teams and projects toward the successful deployment of cutting-edge solutions. Key Accountabilities: Analyze internal and external business requirements and recommend network solutions or … best practices to meet those needs. Solve complex network problems by taking a broad, strategic perspective to identify effective solutions. Leverage functional knowledge and industry methodologies to resolve challenging network issues. Act as an expert within the network engineering function, providing specialized subject matter expertise. Lead cross More ❯

Job Title: Senior Network Engineer (Contract) Location: Milton Keynes (Hybrid 1 day a week) Rate: £650 - £750 per day DOE (Inside IR35) Overview: The Senior Network Engineer is responsible for managing the full lifecycle of active network components, ensuring that network solutions … are delivered at pace, standardized, scalable, supportable, and secure. This role requires expertise in various network engineering domains, as well as leadership in guiding teams and projects toward the successful deployment of cutting-edge solutions. Key Accountabilities: Analyze internal and external business requirements and recommend network solutions or … best practices to meet those needs. Solve complex network problems by taking a broad, strategic perspective to identify effective solutions. Leverage functional knowledge and industry methodologies to resolve challenging network issues. Act as an expert within the network engineering function, providing specialized subject matter expertise. Lead cross More ❯

Position: Senior Network Engineer Location: South Oxfordshire On site: 5 days Salary: £50k - £60k Company benefits: * Flexible working * family friendly policies * Health and wellbeing * Saving's schemes * Learning & development * And more * Working with the Senior Network Administrator and IT Security Officer within our clients Scientific … Computing group, the post will be responsible for co-development of the design, development, commissioning and operational support of their science facing network infrastructure both for current facility operations and to play a key role in the delivery of network upgrade and transformation projects. As such, the job … enable effective, dependable, and resilient operation of the clients accelerators, science beamlines, and data centre operations. * Co-design and development of Diamond's Science Network infrastructure to support high performance detectors, storage systems, and cluster services. * Provide network operations support and a source of technical expertise within the More ❯

Senior Network Security Engineer Leading global manufacturing company is looking for a Senior Network Security Engineer to join their growing Network Security Engineering team. The successful candidate will design and implement network security solutions connecting on-premises and public cloud environments, with … focus on Infrastructure-as-Code (IaC) and GitOps methodologies. This is a very technical role and will play a key part in securing the network infrastructure. London 5 DAYS A WEEK. Responsibilities: Design and deploy network security solutions across cloud and on-premises environments. routing and switching protocols … network performance. Analyze operational needs and develop innovative solutions to strengthen network security. Required: Hands-on experience within enterprise network security solutions. Advanced knowledge of routing and switching protocols. Deep understanding of firewalls. More ❯

Opticore IT is currently searching for a Senior Network Engineer to join one of our Financial Services clients for a new data centre implementation project . This opportunity will require you to be in Central London up to 4 days a week. Opticore IT is a specialist … Network Engineer and Project Management consultancy offering a wide variety of opportunities to work within fast-paced, challenging environments across our client base spanning multiple sectors including Finance, Broadcast Media, Telecommunications and more. You will be responsible for the deployment, and configuration of cutting-edge data centre technologies. … in exchange collocations Multicast configuration and troubleshooting Automation tools, including Git, Python, Golang, Jenkins, Terraform and Ansible What you'll bring: Minimum CCNP qualified network engineer Experience using Routing protocols - BGP Low latency networks, including layer 1 switching History working with Cisco IOS-XR, Cisco NXOS, Arista EOS More ❯

A fast-growing Managed Service Provider is seeking a Senior Network Engineer to support a leading High-Frequency Trading (HFT) client. This is a high-impact role focused on Ultra-Low Latency (ULL) network engineering, working onsite at the client’s prestigious offices. 💡 About the Role … You’ll work closely with traders, developers, and technologists on cutting-edge network projects , focused on delivering the fastest, most reliable connectivity possible across the globe. Expect a heavy focus on Market Data , Multicast Networking , Venue Onboarding , and ULL optimisations . Network Automation training will also be provided … perfect for an engineer looking to move into next-gen network skills! 🎯 Key Responsibilities Deliver low-latency, high-performance network solutions for Market Data and HFT applications. Drive new Venue Onboarding projects across global markets. Engineer and optimize multicast and market data distribution. Implement, configure, and More ❯

commercial presence in many global locations across the US, APAC and Europe. We are looking for a highly motivated individual to join as a Senior Network Engineer and be responsible for designing, deploying, managing and maintaining all aspects of the global network and physical infrastructure, ensuring … the best possible uptime and availability to support the business' customers, goals and growth. Responsibilities include: Plan, build, and deliver new network capabilities and deployments from standards and design documents to meet the needs of the business. Maintaining network security through proper configuration of firewalls, wireless access points … and VPN. Maintaining multi-site network operations to support internal applications, operating systems including regular maintenance with both private and public facilities. Physical installation and maintenance of network, power and server hardware. Creating and maintaining documentation and network diagrams. Full lifecycle management of network devices as More ❯

Description Senior Network Engineer Leidos heritage companies pioneered the development of air traffic control systems in the United States more than 50 years ago. Today our systems handle 75 per cent of the air traffic in the U.S. and approximately 60 per cent of the world's … the heart of the innovative development work to modernise ATM solutions. Job Description Working with the Account Architect you will design, deploy, and manage network solutions utilizing the following: Cisco ISE (Identity Services Engine) Cisco Catalyst Center (formerly DNA Center) Cisco Wireless systems leveraging 9800 Controllers Cisco SD-Access … and SD-WAN Cisco SASE services, including Umbrella and Secure Access Palo Alto firewalls Azure networking Maintain and enhance network infrastructure with advanced knowledge of: BGP and BGP Address Families MPLS technologies VPN and remote access solutions Cloud-based environments Collaborate with cross-functional teams to deliver secure and More ❯

We're hiring a Senior Network Engineer who will be responsible for the day-to-day support of our customer's network, ensuring its components are running and are working as expected. Triage and resolution of customer faults with support from wider team as required. Design … planning and implementation of project activities. You'll ideally have multi-vendor network experience of the following - Cisco, FortiGate, Meraki, Palo Alto, Sonicwall. Responsibilities: Ticket Management + Customer Service Must be an exemplar of the ticket management processes Working with the team to ensure that customer tickets are picked … Effective communication to the customer and within the team Infrastructure A subject matter expert in one or more relevant disciplines A comprehensive understanding of network infrastructure & IT ideologies and the interaction between physical, virtual and network layers Multi-vendor network experience of the following Cisco, FortiGate, Meraki More ❯

The details… We are looking for a highly motivated individual to join as a Senior Network Engineer and be responsible for designing, deploying, managing and maintaining all aspects of the global network and physical infrastructure, ensuring the best possible uptime and availability to support the business … customers, goals and growth. Responsibilities include: Plan, build, and deliver new network capabilities and deployments from standards and design documents to meet the needs of the business. Maintaining network security through proper configuration of firewalls, wireless access points and VPN. Maintaining multi-site network operations to support … internal applications, operating systems including regular maintenance with both private and public facilities. Physical installation and maintenance of network, power and server hardware. Creating and maintaining documentation and network diagrams. Full lifecycle management of network devices as well as support and development of network management and More ❯

Network Security Engineer - Peterborough (Hybrid) - £75,000 - £100,000 + Bonus + Benefits We're seeking a skilled Network Engineer to join our client's dynamic team. In this role, you will design, implement, and maintain critical networking infrastructure while driving automation and efficiency. Key Responsibilities … Oversee the design, implementation, and maintenance of Cisco ACI infrastructure. Develop automation solutions for network tasks using Python, Ansible, and Terraform. Engineer and support enterprise-grade network systems, including Cisco routers, Nexus data centre switches, and wireless LAN controllers. Configure and manage Palo Alto firewalls, ensuring adherence … to security standards. Deploy and administer network access control solutions with Cisco ISE (802.1x and TACACS). Optimize uptime and performance using F5 Big-IP load balancers. Design and manage advanced routing solutions with protocols such as BGP and OSPF, as well as SD-WAN implementations. Utilize tools like More ❯

Network Security Engineer – Peterborough (Hybrid) - £75,000 - £100,000 + Bonus + Benefits We’re looking for a skilled Network Engineer to join our clients dynamic team. In this role, you’ll design, implement, and maintain critical networking infrastructure while driving automation and efficiency. Key Responsibilities … Oversee the design, implementation, and maintenance of Cisco ACI infrastructure. Develop automation solutions for network tasks using Python, Ansible, and Terraform. Engineer and support enterprise-grade network systems, including Cisco routers, Nexus data centre switches, and wireless LAN controllers. Configure and manage Palo Alto firewalls, ensuring adherence … to robust security standards. Deploy and administer network access control solutions with Cisco ISE (802.1x and TACACS). Optimise uptime and performance using F5 Big-IP load balancers. Design and manage advanced routing solutions with protocols such as BGP and OSPF, as well as SD-WAN implementations. Utilise tools More ❯

other with respect and regard We're always thinking 'what's next?' Job Description: On a day-to-day basis, you will manage the network infrastructure that delivers UK & Ireland core network connectivity, including core POP sites, transit interconnection, peering and fibre backhaul services to our Reading Data … your direct responsibility. This includes making sure that all services are available for 100% of the time as well as making sure that the network is deployed in a resilient configuration, failures, faults and general health issues are quickly resolved, and careful capacity planning to deliver in advance of … to troubleshoot problems without escalating them. You should have at least 8-10 years of experience in an IT Systems role (5 years of network engineering within the ISP industry), and a technical-related degree is preferred. You should be a highly proactive individual who can create resilient, scalable More ❯

Senior Networking Engineer Permanent £70,000 - £80,000 per annum 4 days a week on site in London I am looking for a Senior Networking Engineer to join a thriving IT solutions consultancy offering the chance to work on the most exciting data centre technologies! Currently … new data centre implementation project for a financial services client, this is a fantastic opportunity to work at the cutting edge of low-latency network design, colocation infrastructure, and network automation. You will play a critical role in designing, building, and supporting high-performance, highly available network … experience deploying networks in low latency Proven experience in financial trading environments. Solid knowledge of WAN technologies, optical networking, and fibre waves. Proficient in network automation (Ansible, Python, Jinja2, Git, Terraform, Jenkins). Experience in: Multicast configuration and troubleshooting Layer 1 MUX switching Packet tapping and timestamping Network More ❯

Job title: 3rd Line Senior Network Engineer Location: Bracknell or Basingstoke Salary: £55k plus 3% bonus This role is worked over 2 different shifts: 8am - 4pm or 10am - 6pm Candidates for this role must be willing and eligible to go through SC clearance. Job description: Providing operational … support to a large enterprise network that runs 24/7 across two data centres and remote offices throughout the UK. You will collaborate with the rest of the team to maintain on-premise networks to support BAU activities, perform network configuration changes, upgrades and liaise with third … features (ASDM, ACLs, IPSEC VPNs) Experience working with Cisco Catalyst switches, Cisco Nexus switches, Cisco ISR and ASR routers, and Cisco ISE Understanding of network-level encryption Strong experience with Juniper leaves spines and switches F5 Load Balancers Cisco ISE Appliance Desirable: Solid understanding and working knowledge of core More ❯

treatments for disease to innovative engineering and cutting-edge technology. World class science requires world class computing infrastructure. Our Scientific Computing team provides computing network and storage systems that keep Diamond and its scientists at the forefront of scientific research About the Role We now have an excellent opportunity … for a Senior Network Engineer within Diamonds Scientific Computing team to support and develop the scientific and controls networks used for cutting edge science. High bandwidth ethernet forms the basis of all the critical networks within Diamond alongside more specialist low latency fabrics. These enable rapid and … You will hold a degree level qualification in a computing or science subject or demonstrate equivalent experience. You will need to demonstrate experience of: Network administration of medium to large sized networks Experience of different network systems, e.g. Cisco, Extreme, Avaya, Nvidia Experience and knowledge of 1/ More ❯

Partner Job CBSbutler Holdings Limited trading as CBSbutler Job title: 3rd Line Senior Network Engineer Location: Bracknell or Basingstoke Salary: £55k plus 3% bonus This role involves working over 2 shifts: 8am - 4pm or 10am - 6pm. Candidates must be willing and eligible to undergo SC clearance. Responsibilities … include providing operational support to a large enterprise network that operates 24/7 across two data centres and remote offices throughout the UK. You will collaborate with the team to maintain on-premise networks, perform configuration changes, upgrades, and liaise with third parties, internal teams, and end customers. … like ASDM, ACLs, IPSEC VPNs. Experience working with Cisco Catalyst switches, Cisco Nexus switches, Cisco ISR and ASR routers, and Cisco ISE. Understanding of network-level encryption. Strong experience with Juniper leaves, spines, and switches. F5 Load Balancers knowledge. Knowledge of Cisco ISE Appliance. Desirable Skills: Core routing and More ❯

Senior Cyber Security & Network Project Engineer Location: Brighton/London/South East/Hybrid Package: £70-100K + Pack Type: Full-time Award-winning MSP We're working with a highly respected, independent tech firm that s redefining what great looks like in cybersecurity and … network solutions. With a track record of delivering some of the most complex infrastructure projects in the UK and Europe, they re now looking to grow their senior engineering team with someone who can lead from the front technically and strategically. This is a fantastic opportunity for an … experienced Cyber Security & Network Engineer who thrives in a hands-on role, enjoys client engagement, and wants to shape the future of secure, intelligent networks. The Role You ll work closely with the presales, delivery, and solutions teams to design and implement market-leading network and security More ❯