277 Network Administrators jobs in the United Kingdom

Network Security Engineer

Location: Basingstoke (Hybrid - 2-3 days on-site per week)

Salary: Up to 60,000 + 10% bonus

83zero are proud to be working with a leading global organisation, headquartered in Basingstoke, who are on the lookout for a Network Security Engineer to join their Central IT division. This business operates within a secure and highly regulated environment and are looking for a technically skilled professional to help maintain and enhance their critical network infrastructure.

As a Network Security Engineer , you'll play a vital role in the build, support, and evolution of complex networking systems, ensuring resilience, security, and performance across their production, pre-production, and development environments. You'll work closely with the Infrastructure and Security teams to both proactively manage the network and support ongoing security initiatives.

Key Responsibilities:

• Provide technical support and network configuration across LAN, WAN, WLAN, VPN, firewalls, and intrusion prevention systems
• Maintain and support Cisco, HP, and Check Point hardware/software
• Respond to service requests and incidents in line with ITIL processes
• Monitor and enhance network security controls including web security gateways, NAC, endpoint security, and perimeter defense
• Contribute to internal reviews, security audits, vulnerability assessments, and penetration testing
• Support firewall rule changes, VPN access, network segmentation, and performance improvements
• Participate in on-call rotation for high-priority issues and assist during major incidents
• Create and maintain documentation including SOPs and security protocols
• Support IT security team with threat modelling, remediation, and policy compliance

Essential:

• Strong background in network engineering and troubleshooting across complex environments
• Operational knowledge of LAN/WAN infrastructure, routing protocols (OSPF, BGP, EIGRP), VPN (IPSec, IKE, SSL), and firewall configuration
• Experience working in secure environments with a focus on proactive security posture
• Knowledge of network security tools such as Cisco Secure Access, Cisco ISE, Microsoft Defender XDR, Sentinel, and SentinelOne
• Comfortable with vulnerability management frameworks and tools
• Familiarity with network monitoring and performance management
• Previous experience working within an ITIL-based support framework
• Hands-on experience with Check Point, Cisco, or Palo Alto firewalls

Desirable:

• Certifications such as CCNA, CCNP, CISSP, or equivalent
• Experience with Citrix load balancing and Microsoft Azure networking
• Knowledge of WAF technologies
• ITIL Foundation certification

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.

Network Security Engineer

Location: Basingstoke (Hybrid - 2-3 days on-site per week)

Salary: Up to 60,000 + 10% bonus

83zero are proud to be working with a leading global organisation, headquartered in Basingstoke, who are on the lookout for a Network Security Engineer to join their Central IT division. This business operates within a secure and highly regulated environment and are looking for a technically skilled professional to help maintain and enhance their critical network infrastructure.

As a Network Security Engineer , you'll play a vital role in the build, support, and evolution of complex networking systems, ensuring resilience, security, and performance across their production, pre-production, and development environments. You'll work closely with the Infrastructure and Security teams to both proactively manage the network and support ongoing security initiatives.

Key Responsibilities:

• Provide technical support and network configuration across LAN, WAN, WLAN, VPN, firewalls, and intrusion prevention systems
• Maintain and support Cisco, HP, and Check Point hardware/software
• Respond to service requests and incidents in line with ITIL processes
• Monitor and enhance network security controls including web security gateways, NAC, endpoint security, and perimeter defense
• Contribute to internal reviews, security audits, vulnerability assessments, and penetration testing
• Support firewall rule changes, VPN access, network segmentation, and performance improvements
• Participate in on-call rotation for high-priority issues and assist during major incidents
• Create and maintain documentation including SOPs and security protocols
• Support IT security team with threat modelling, remediation, and policy compliance

Essential:

• Strong background in network engineering and troubleshooting across complex environments
• Operational knowledge of LAN/WAN infrastructure, routing protocols (OSPF, BGP, EIGRP), VPN (IPSec, IKE, SSL), and firewall configuration
• Experience working in secure environments with a focus on proactive security posture
• Knowledge of network security tools such as Cisco Secure Access, Cisco ISE, Microsoft Defender XDR, Sentinel, and SentinelOne
• Comfortable with vulnerability management frameworks and tools
• Familiarity with network monitoring and performance management
• Previous experience working within an ITIL-based support framework
• Hands-on experience with Check Point, Cisco, or Palo Alto firewalls

Desirable:

• Certifications such as CCNA, CCNP, CISSP, or equivalent
• Experience with Citrix load balancing and Microsoft Azure networking
• Knowledge of WAF technologies
• ITIL Foundation certification

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.

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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)

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)

WHJS1_UKTJ

WHJS1_UKTJ