36 Network Infrastructure jobs in the United Kingdom

Our client, a leading telecommunications provider in the UK, is looking for a skilled Network Infrastructure Engineer to join their expanding technical team in Bristol, South West England, UK . This hybrid role requires a blend of on-site presence for critical infrastructure maintenance and collaborative sessions, and remote work flexibility. You will be responsible for the design, implementation, configuration, and maintenance of complex network systems, ensuring optimal performance, security, and reliability. Key responsibilities include troubleshooting network issues, performing upgrades and patching, developing network documentation, and participating in capacity planning. You will work with various network technologies, including routing, switching, firewalls, and VPNs, across diverse enterprise environments. The ideal candidate will possess a strong understanding of TCP/IP protocols, Cisco IOS, Juniper Junos, or similar network operating systems. Experience with network monitoring tools, such as SolarWinds or Nagios, is essential. A degree in Computer Science, Engineering, or a related field, or equivalent practical experience, is required. Certifications like CCNA, CCNP, or JNCIS are highly advantageous. You should have excellent analytical and problem-solving abilities, with a proactive approach to identifying and resolving potential network disruptions. Collaboration with other IT departments to ensure seamless integration of network services will be a key aspect of the role. This is an exciting opportunity to contribute to the advancement of cutting-edge telecommunications infrastructure and grow your career within a reputable organisation.

**Who Are We?**
Taking care of our customers, our communities and each other. That's the Travelers Promise. By honoring this commitment, we have maintained our reputation as one of the best property casualty insurers in the industry for over 160 years. Join us to discover a culture that is rooted in innovation and thrives on collaboration. Imagine loving what you do and where you do it.
**Job Category**
Technology
**Target Openings**
1
**What Is the Opportunity?**
We are seeking a highly skilled and motivated Consulting Technology Engineer with strong experience of AWS and Automation, specialising in design, deployment, maintenance and support of Travelers' Wide Area Networks to join our network team in Redhill, Surrey.
As a consulting technology engineer, you will be responsible for managing network connectivity services for Travelers' Wide Area Network backbone, SD-WAN environment, offshore and onshore field offices, cloud network infrastructure, inter-business and cloud exchange colocation connections and on prem workloads in UK & North America based data centers. Responsibility of the position will require the ability to design, configure, deploy, test, troubleshoot and maintain the network components with a focus on code-based management to support connectivity requirements for 30,000+ employees and business partners, deliver enhancements, support a cloud network foundation and provide hands on support in local UK-based data centers or offices as needed.
Operating as a Team Lead, under limited supervision, you will demonstrate a comprehensive understanding of the activities performed related to engineering support, installation and/or operations of infrastructure technologies. Plans at a tactical level and manages the effective use of technology resources for assigned projects and functions. May direct assigned project staff to design, develop and/or implement large, complex technology solutions supporting one or more business and/or technology area. Develops and implements appropriate solutions that may involve multiple platforms, databases, software/hardware technologies and tools. Facilitates and participates in the design and development of network topology, routing, switching and security solutions. Strong ability to multi-task in an environment of constantly changing priorities.
Travelers Europe currently offers flexibility to employees who wish to work on a hybrid basis in accordance with our Hybrid Work Arrangements Policy. This entails full time employees working three days a week in the office and two days at home (or pro rata for part-time employees). This policy may be changed at the Company's discretion.
**What Will You Do?**
+ Responsible for designing, engineering, analysis, configuration, and troubleshooting of the company's WAN, cloud and on-prem network infrastructure and services. This includes switches, routers, firewalls, SD-WAN solution, WAN protocols, and dynamic routing.
+ Design and implement network solutions in any of the following network environments to support a wide variety of business applications: Cloud VPNs, Global Wide Area Network, High Speed Core Network, Data Center fabric, Remote/Campus/Offshore offices, Internet/DMZ, Business to Business connections
+ Maintain quality and reliability of our network service availability while developing innovative ways to manage the infrastructure and deliver network services with infrastructure as code principles
+ Ensure a high level of availability for network services, monitoring existing hardware/software, network performance and provide prompt response to issues
+ Provide smart-hands support for local network issues in and around London with periodic travel to UK field offices
+ Provide third level support with troubleshooting issues affecting our network
+ Build, leverage, and maintain alliances across technical and business communities to achieve efficient and effective results
+ Collaborate with peers to proactively identify potential issues and areas of improvement in existing network environment
+ Work with application areas and lines of business to provide technology solutions to support the business
+ Gaining industry experience and exposure to seed new ideas with respect to the company's best interests
+ Contribute to research, evaluation and recommendations of new technologies or redesign of existing solutions
+ Maintain detailed documentation for IT infrastructure
+ Present findings, updates and recommendations to all levels of management, up to and including C level executives
+ Ability to multi-task, prioritize work and manage projects within established budget objectives and customer priorities
+ Ensure that industry best practices and methodologies are applied to design, deployment and operations of network infrastructure
+ Responsible for establishing and managing to established quality control and security protocols
+ Develop tactics and operational plans in alignment with strategic objectives for assigned technologies and projects.
+ Drive the execution of departmental and corporate programs.
+ Leverage infrastructure technology to develop and/or redesign technology solutions.
+ Build, leverage, and maintain effective alliances across technical and business community.
+ Interact with customers to achieve efficient, effective results.
+ Multi-task, align to business priorities and production availability requirements.
+ Perform as a technical expert within the service delivery organization (SDO) and consults across SDOs.
+ Participate in on call rotation to provide 24/7 support
+ Other duties as assigned
**What Will Our Ideal Candidate Have?**
+ Experience in Technology preferred.
+ Experience as a technical lead preferred.
+ Advanced knowledge of infrastructure technologies such as Network, Database, Server, Storage etc. preferred.
**Preferred Job Specific Technical Skills and Competencies**
Experience designing, implementing and supporting the following network technology solutions:
+ Native cloud services and connectivity in AWS and/or GCP required
+ Proficiency in Wide area network connectivity, Data Center Networks and branch connectivity: Cisco Switching/Routing (Nexus/ASR/ISR), Firewalls & SD-WAN technologies required
+ Proficiency in automation scripting languages required (Terraform, Python, REST API, Rundeck) to automate network configuration, provisioning and management
+ Successfully leverage network management and performance analysis tools (Broadcom DXNetOps, Appneta, Wireshark, DataDog)
+ Telecommunications (MPLS, Optical Networks, ISPs, CDNs, SLAs) required
+ Networking (WAN, LAN, Routing:BGP,OSPF,VxLAN, NFV, IPv4, QoS, Traffic Profiling, Anomaly Detection, Disaster Recovery, Business Continuity, Continuous Availability, High Availability)
Successful candidate will align to the following:
+ Possess exceptional interpersonal skills, technical communication skills, as well as a strong work ethic
+ Demonstrate a solid working knowledge of capabilities and direction of technology to support assigned projects that will meet business needs
+ Ability to design and implement solutions to meet business needs that reflect a clear understanding of the objectives, practices and procedures of the corporation, department and business area
+ Demonstrate the ability to interpret technology and market trends as a foundation for technology and product roadmaps
+ Ability to multitask and operate under tight timelines and remain focused under pressure (ex. critical outage/disaster)
+ Emphasize on customer focus, collaboration and follow-up skills
Expert knowledge of one or more of the following technical skills:
+ Foundational IT Infrastructure
+ Operating Systems
+ Knowledge of process discipline and IDLC methodology
**What is a Must Have?**
+ A bachelor's degree in Computer Science or a related field, or its equivalent in work experience, plus five years of experience in Technology required.
+ Alternatively, a Master's degree in CS or a related field and three years of work experience in Technology
**What Is in It for You?**
+ **Private Medical Insuran** **ce:** On commencement of employment, you are eligible for single cover provided by Travelers, with the option to add cover for your dependents, at your expense through payroll deduction.
+ **Retirement:** Travelers will make a core contribution of a percentage of salary to your Pension Plan. Additionally, if you decide to contribute to the plan, you will receive an increased company contribution.
+ **Holiday Entitlement:** Start your career at Travelers with a minimum of 25 days holiday entitlement annually, plus the opportunity to purchase additional days to allow for up to a total of 35 holidays per year.
+ **Wellness Programme:** The Travelers wellness programme is comprised of tools, discounts and resources that empower you to achieve your wellness goals and caregiving needs. In addition, our mental health programme provides access to free professional counseling services and other resources that support your daily life needs.
+ **Volunteer Encouragement:** We have a deep commitment to the communities we serve and encourage our employees to get involved. Travelers has a Matching Gift and Volunteer Rewards programme that enables you to give back to the charity of your choice.
**Employment Practices**
Travelers is an equal opportunity employer. We value the unique abilities and talents each individual brings to our organization and recognize that we benefit in numerous ways from our differences.
If you are a candidate and have specific questions regarding the physical requirements of this role, please send us an email ( ) so we may assist you.
Travelers reserves the right to fill this position at a level above or below the level included in this posting.
To learn more about our comprehensive benefit programs please visit .

Our client, a prominent player in the Telecoms sector, is seeking a highly skilled Senior Network Infrastructure Engineer to join their technical operations team. This role is based in our bustling **Edinburgh, Scotland, UK** office, offering a hybrid working model that blends office collaboration with remote flexibility. You will be instrumental in the design, implementation, maintenance, and optimisation of our extensive network infrastructure, ensuring high availability, performance, and security. This includes managing complex routing and switching environments, implementing advanced security protocols, and overseeing network upgrades and expansions. The ideal candidate will have a deep understanding of various networking technologies, including TCP/IP, BGP, OSPF, MPLS, and VPNs, as well as expertise in network monitoring and troubleshooting tools. You will be responsible for diagnosing and resolving intricate network issues, often under tight deadlines, and contributing to the development of network resilience strategies. Collaboration with other IT teams, vendors, and stakeholders is essential to ensure seamless integration of network services and to support business objectives. This position requires strong analytical skills, meticulous attention to detail, and the ability to work independently as well as part of a team. You will also be involved in capacity planning, performance tuning, and the evaluation of new network technologies to enhance our service delivery. The successful applicant will possess a vendor-neutral certification such as CCIE or CCNP, or equivalent demonstrable experience. Experience with network automation and scripting (e.g., Python, Ansible) is highly desirable. This role offers a significant opportunity to influence the technical direction of a growing organisation and to work on challenging projects that are critical to our ongoing success in the telecommunications industry. Your expertise will be vital in maintaining the robust and reliable network that underpins our services.
Responsibilities:

• Design, implement, and maintain robust network infrastructure.
• Configure and manage routers, switches, firewalls, and load balancers.
• Ensure network security and implement best practices for threat prevention.
• Troubleshoot and resolve complex network issues in a timely manner.
• Monitor network performance and optimize for efficiency and reliability.
• Develop and maintain network documentation, including diagrams and configurations.
• Participate in network capacity planning and hardware lifecycle management.
• Evaluate and recommend new network technologies and solutions.
• Collaborate with cross-functional IT teams and external vendors.
• Lead network upgrade projects and ensure minimal disruption.
• Provide technical guidance and mentorship to junior engineers.
• Ensure compliance with industry standards and best practices.

Qualifications:

• Bachelor's degree in Computer Science, Engineering, or a related field, or equivalent experience.
• Minimum of 6 years of experience in network engineering and infrastructure management.
• In-depth knowledge of TCP/IP, routing protocols (BGP, OSPF), and switching technologies.
• Experience with firewall configuration and network security principles.
• Proficiency in network monitoring and diagnostic tools (e.g., Wireshark, Nagios).
• Relevant certifications such as CCNA, CCNP, or CCIE are highly desirable.
• Experience with network automation and scripting languages (e.g., Python, Ansible).
• Strong analytical and problem-solving skills.
• Excellent communication and interpersonal abilities.
• Ability to work effectively in a hybrid work environment.

Our client, a leading innovator in the telecommunications sector, is seeking a highly skilled Network Infrastructure Engineer to join their growing team in Derby, Derbyshire, UK . This is a critical role focused on the design, implementation, and maintenance of our client's robust network infrastructure. You will be responsible for ensuring the reliability, performance, and security of our telecommunications networks, supporting a wide range of services. Key responsibilities include architecting network solutions, configuring and deploying network hardware and software, troubleshooting complex network issues, and performing regular system upgrades and maintenance. You will work closely with cross-functional teams, including network operations, systems administration, and development, to deliver high-quality network services. A deep understanding of routing protocols (e.g., BGP, OSPF), switching technologies, firewalls, load balancers, and network security principles is essential. Experience with carrier-grade network environments and familiarity with telecommunications standards and protocols are highly desirable. The ideal candidate will possess strong analytical and problem-solving skills, with the ability to work effectively under pressure and manage multiple priorities. Excellent communication and documentation skills are also crucial, as you will be responsible for detailing network designs and operational procedures. This is an excellent opportunity for a motivated engineer to contribute to the advancement of cutting-edge telecommunications technology and play a key role in maintaining a high-availability network. Continuous professional development and exposure to the latest networking technologies will be provided.

Responsibilities:

• Design, implement, and manage complex network infrastructures.
• Configure and maintain routers, switches, firewalls, and other network devices.
• Ensure the high availability, performance, and security of network services.
• Troubleshoot and resolve network-related incidents and problems.
• Develop and document network architecture, configurations, and operational procedures.
• Collaborate with other engineering teams on system integration and deployment.
• Participate in capacity planning and performance tuning of network systems.
• Stay up-to-date with emerging network technologies and industry best practices.
• Manage network security policies and implement security best practices.
• Provide technical support and guidance to operations teams.

Qualifications:

• Bachelor's degree in Computer Science, Engineering, or a related field, or equivalent practical experience.
• Proven experience as a Network Engineer or in a similar role within the telecommunications industry.
• In-depth knowledge of TCP/IP, routing protocols (BGP, OSPF), and switching technologies.
• Experience with network security principles, firewalls, and VPNs.
• Familiarity with network monitoring and management tools.
• Strong analytical and troubleshooting skills.
• Excellent communication and interpersonal skills.
• Ability to work independently and as part of a team.
• Relevant industry certifications (e.g., CCNA, CCNP, JNCIS) are a plus.

Our client is looking for a highly skilled Senior Network Infrastructure Engineer to join their dynamic IT team. This role will involve the design, implementation, and maintenance of robust and scalable network infrastructure, supporting critical business operations. You will be responsible for ensuring the high availability, performance, and security of the company's network environment. The position requires a deep understanding of networking protocols, hardware, and software, including routers, switches, firewalls, and VPNs. You will play a key role in troubleshooting complex network issues, performing root cause analysis, and implementing preventative measures. This role also involves contributing to the strategic planning of network upgrades and expansions, evaluating new technologies, and making recommendations for improvements. Collaboration with other IT teams, including systems administration and cybersecurity, is essential to ensure seamless integration and security. The ideal candidate will have a proven track record in network engineering, with experience in enterprise-level environments. You should be adept at managing multiple projects simultaneously, prioritizing tasks effectively, and working within tight deadlines. Strong documentation skills are required to maintain network diagrams, configurations, and operational procedures. This role offers a hybrid working arrangement, allowing for a blend of remote work and on-site collaboration in Glasgow, Scotland, UK . You will be expected to participate in on-call rotations to provide support outside of standard business hours. Certifications such as CCIE, CCNP, or similar are highly valued. This is an excellent opportunity for a motivated engineer to take on significant responsibility and contribute to a forward-thinking organization. You will be involved in the entire lifecycle of network projects, from initial design and proof-of-concept to deployment and ongoing support. Experience with cloud networking (AWS, Azure, GCP) is a significant advantage. The ability to mentor junior engineers and share knowledge within the team is also a desirable trait. Our client is committed to providing a challenging and rewarding work environment, fostering professional growth and development. You will have the opportunity to work with cutting-edge technologies and make a real impact on the business's technological infrastructure.

Responsibilities:

• Design, implement, and manage enterprise-level network infrastructure.
• Ensure network security, availability, and performance.
• Troubleshoot and resolve complex network issues.
• Develop and maintain network documentation.
• Participate in network capacity planning and upgrades.
• Evaluate and recommend new networking technologies.
• Collaborate with IT teams on projects and security initiatives.
• Provide on-call support and incident response.
• Mentor junior network engineers.

Qualifications:

• Bachelor's degree in Computer Science, IT, or a related field, or equivalent experience.
• Extensive experience in network engineering.
• In-depth knowledge of TCP/IP, BGP, OSPF, VLANs, and other networking protocols.
• Hands-on experience with Cisco, Juniper, or other enterprise-grade network hardware.
• Experience with network security technologies (firewalls, IDS/IPS).
• Strong troubleshooting and problem-solving skills.
• Excellent communication and teamwork abilities.
• Relevant industry certifications (CCNP, CCIE) are preferred.
• Experience with cloud networking environments is a plus.

Our client, a rapidly expanding telecommunications provider, is seeking an experienced Senior Network Infrastructure Engineer to join their dedicated team based in **Sheffield, South Yorkshire, UK**. This is a critical on-site role where you will be responsible for the design, implementation, maintenance, and optimization of our robust network infrastructure. You will play a pivotal role in ensuring the reliability, performance, and security of our telecommunication services, supporting our growing customer base. This is an exciting opportunity to work with cutting-edge technologies and contribute to the backbone of our digital communications.

Responsibilities:

• Design, deploy, and manage complex enterprise-level network infrastructure, including routers, switches, firewalls, and load balancers.
• Monitor network performance and ensure high availability and reliability.
• Troubleshoot and resolve network-related issues, providing timely and effective solutions.
• Implement and maintain network security policies and procedures.
• Plan and execute network upgrades and migrations with minimal disruption to services.
• Develop and maintain comprehensive network documentation, including diagrams and configurations.
• Collaborate with cross-functional teams to support new service deployments and infrastructure enhancements.
• Evaluate and recommend new network technologies and solutions.
• Participate in an on-call rotation to provide 24/7 support for critical network issues.
• Mentor junior network engineers and share expertise.
• Ensure adherence to industry best practices and regulatory compliance.
• Manage vendor relationships for network hardware and software.

Qualifications:

• Bachelor's degree in Computer Science, Information Technology, Electrical Engineering, or a related field.
• Minimum of 5-7 years of hands-on experience in network engineering and infrastructure management.
• In-depth knowledge of TCP/IP, routing protocols (BGP, OSPF), and switching technologies.
• Experience with network security principles and technologies (firewalls, VPNs, IDS/IPS).
• Proficiency in configuring and managing Cisco, Juniper, or similar network hardware.
• Experience with network monitoring tools (e.g., SolarWinds, PRTG, Nagios).
• Understanding of wireless networking technologies and security.
• Relevant certifications such as CCNP, CCIE, JNCIE, or equivalent are highly desirable.
• Strong analytical and problem-solving skills.
• Excellent communication and teamwork abilities.
• Ability to work effectively under pressure and manage multiple priorities.

If you are a seasoned network professional looking for a challenging and rewarding opportunity in a fast-paced industry, we want to hear from you.

Network Infrastructure Security Manager - HYBRID WORKINGnPosition Summary:

We are seeking an experienced Infrastructure/Security Manager to lead our IT operations and cybersecurity initiatives. The ideal candidate will have a strong technical background, with the ability to combine hands-on technical expertise with leadership capabilities.

Responsible for driving company IT security, and stability of all IT systems and services.

Responsibilities

Implement and enforce cybersecurity best practices (ISO 27001, CE+, CIS benchmarks), including endpoint protection, vulnerability scanning, penetration testing, and incident response planning.

Ensure compliance with regulatory standards such as GDPR

Ensure best security practice for Office 365, Exchange Online, and SharePoint administration.

Administer Firewalls, VPNs, and endpoint security solutions, ensuring zero-trust security models.

Lead security aspects of IT projects, network upgrades, and enterprise application deployments.

Lead in deployment and management of backups, disaster recovery (DR) plans, and business continuity strategies.

Evaluate, propose, and implement tools and automation solutions to streamline security related operations.

Prepare detailed technical documentation for systems (both proposed and implemented), security processes, and user training.

Technical Skills and Experience

10+ years of hands-on IT infrastructure and security management.

Long held experience of working within an enterprise scale organisation.

Hand on experience of regular systems troubleshooting, patching, and updating.

Must be skilled at investigating and remediating reported vulnerabilities, and a have proactive approach to solutions.

Deep understanding of cybersecurity frameworks and tools (EDR, SIEM, MFA, PKI, DLP).

Nessus VAPT reporting and remediation

Strong expertise in:

Microsoft technologies (Windows Server, Azure Active Directory)

Virtualization platforms (VMware ESXi, Proxmox)

Networking including Layer 2/3 switching, routing, VLANs, VPNs.

Cloud environments (IBM Cloud, AWS, Azure) - deployments and architecture.

Proficient in backup and disaster recovery technologies.

Supporting end users

Certifications (Preferred)

Microsoft Certified Professional

AWS Certified Solutions Architect - Associate/Professional

VMware Certified Professional (VCP)

Due to the volume of applications received for positions, it will not be possible to respond to all applications and only applicants who are considered suitable for interview will be contacted.

Proactive Appointments Limited operates as an employment agency and employment business and is an equal opportunities organisation

We take our obligations to protect your personal data very seriously. Any information provided to us will be processed as detailed in our Privacy Notice, a copy of which can be found on our website

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OverviewnNetwork Infrastructure Security Manager – HYBRID WORKING

Position Summary:

We are seeking an experienced Infrastructure/Security Manager to lead our IT operations and cybersecurity initiatives. The ideal candidate will have a strong technical background, with the ability to combine hands-on technical expertise with leadership capabilities. Responsible for driving company IT security, and stability of all IT systems and services.

Responsibilities

Implement and enforce cybersecurity best practices (ISO 27001, CE+, CIS benchmarks), including endpoint protection, vulnerability scanning, penetration testing, and incident response planning.

Ensure compliance with regulatory standards such as GDPR

Ensure best security practice for Office 365, Exchange Online, and SharePoint administration.

Administer firewalls, VPNs, and endpoint security solutions, ensuring zero-trust security models.

Lead security aspects of IT projects, network upgrades, and enterprise application deployments.

Lead in deployment and management of backups, disaster recovery (DR) plans, and business continuity strategies.

Evaluate, propose, and implement tools and automation solutions to streamline security related operations.

Prepare detailed technical documentation for systems (both proposed and implemented), security processes, and user training.

Technical Skills and Experience

10+ years of hands-on IT infrastructure and security management.

Long held experience of working within an enterprise scale organisation.

Hand on experience of regular systems troubleshooting, patching, and updating.

Must be skilled at investigating and remediating reported vulnerabilities, and a have proactive approach to solutions.

Deep understanding of cybersecurity frameworks and tools (EDR, SIEM, MFA, PKI, DLP).

Nessus VAPT reporting and remediation

Strong expertise in:

Microsoft technologies (Windows Server, Azure Active Directory)

Virtualization platforms (VMware ESXi, Proxmox)

Networking including Layer 2/3 switching, routing, VLANs, VPNs.

Cloud environments (IBM Cloud,AWS, Azure) – deployments and architecture.

Proficient in backup and disaster recovery technologies.

Supporting end users

Certifications (Preferred)

Microsoft Certified Professional

AWS Certified Solutions Architect – Associate/Professional

VMware Certified Professional (VCP)

Due to the volume of applications received for positions, it will not be possible to respond to all applications and only applicants who are considered suitable for interview will be contacted.

Proactive Appointments Limited operates as an employment agency and employment business and is an equal opportunities organisation

We take our obligations to protect your personal data very seriously. Any information provided to us will be processed as detailed in our Privacy Notice, a copy of which can be found on our website