Job Description

Network / IT Engineer vacancy in Tewkesbury (230BS)

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Our client is an established and growing defence technology company delivering secure, high-performance networking solutions to UK Defence customers.

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Due to continued growth, they are seeking an experienced Network Engineer to join their engineering team.

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This is a predominantly field-based role, supporting the deployment, maintenance and optimisation of enterprise network infrastructure across secure customer environments.

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This position is ideal for an engineer who enjoys combining technical expertise with customer engagement, taking ownership of projects and delivering resilient, secure networking solutions that support mission-critical operations.

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The Role

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- As a Network Engineer, you'll be responsible for designing, implementing and supporting enterprise network infrastructure across a range of secure Defence environments.
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- Working closely with customers and internal engineering teams, you'll carry out installations, upgrades, preventative maintenance, network audits and fault resolution, ensuring systems remain secure, reliable and available.
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- This role involves frequent travel to customer sites throughout the UK, primarily across the Midlands and surrounding areas. A mileage allowance is provided for all business travel.
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Key Responsibilities

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- Design, implement and support enterprise network infrastructure.
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- Deploy, configure and maintain high-performance routing and switching environments.
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- Configure and support NVIDIA Mellanox Ethernet switches running Cumulus Linux (including MSN2100, MSN2201 and MSN3420 platforms).
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- Install, configure and support Cisco Catalyst 9300 switching platforms.
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- Configure, administer and troubleshoot Cisco Firepower 2100 Series appliances running Firepower Threat Defence (FTD).
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- Deliver customer site installations, upgrades, preventative maintenance and technical health checks.
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- Diagnose and resolve complex routing, switching, firewall and connectivity issues.
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- Produce high-quality technical documentation including implementation plans, network diagrams and operational procedures.
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- Work directly with customers to understand technical requirements and deliver effective networking solutions.
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- Participate in planned maintenance windows and occasional out-of-hours activities where required.
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About You

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- Our client is looking for an experienced Network Engineer who enjoys solving complex technical challenges and working directly with customers.
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- You'll be confident leading technical discussions, comfortable working independently and committed to delivering high-quality engineering solutions within secure environments.
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You'll ideally have:

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- Extensive experience designing, implementing and supporting enterprise network infrastructure.
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- Expert knowledge of routing and switching technologies.
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- Strong troubleshooting, analytical and diagnostic skills.
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- Excellent customer-facing communication and stakeholder management skills.
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- Experience working within secure or cryptographic environments.
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Strong knowledge of:

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- BGP
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- OSPF
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- VLANs
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- VRRP / HSRP
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- Spanning Tree
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- Quality of Service (QoS)
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- Multicast
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- IPv4 / IPv6
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- High Availability networking
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Hands-on experience with:

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- NVIDIA Mellanox Ethernet switches running Cumulus Linux.
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- Modern data centre networking technologies including:
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- EVPN
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- VXLAN
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- MLAG
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- Leaf-Spine architectures
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Desirable Skills

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- Infrastructure as Code (IaC) using Ansible.
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- Linux systems administration.
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- VMware ESXi administration.
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- Network automation and configuration management.
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- Monitoring, logging and network performance analysis tools.
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- Git-based configuration management.
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- Experience supporting secure or air-gapped environments.
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- Relevant certifications such as CCNP Enterprise, CCIE Enterprise Infrastructure, NVIDIA Networking, or equivalent.
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What's on Offer

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Benefits

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- Flexible working culture and flexible working hours.
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- 25 days annual leave plus the option to purchase additional leave.
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- 10% employer pension contribution.
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- Health Cash Plan for employees and eligible family members.
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- Benefits platform including Cycle to Work, technology purchase schemes and retail discounts.
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- Ongoing training and career development.
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- Two annual bonus opportunities (subject to company performance).
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- Enhanced maternity, paternity and adoption leave.
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- Recruitment referral bonus.
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- Reservist leave.
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- Modern office facilities with complimentary refreshments.
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- Smart casual "Dress for Your Day" policy.
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- Free parking or parking reimbursement.
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- Company social events and annual training days.
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Security Requirements

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Due to the nature of this role, applicants must be eligible to obtain and maintain UK Developed Vetting (DV) clearance and STRAP access.

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A full UK driving licence and willingness to travel extensively throughout the UK are essential.

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Candidates with active DV clearance are highly encouraged to apply.

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📌 Network / IT Engineer vacancy in Tewkesbury (230BS)
🏢 Ex-Mill Recruitment
📍 Tewkesbury