1,227,840open jobs
69,546companies
213,293added this week
Browse all
Salary
≈ $62k – $154k per year (Estimated)
Location
Hybrid (Farnborough, United Kingdom)
Seniority
Senior · 5+ years exp

Confirmed on the employer's own hiring board on Oct 4, 2026. First seen by Alion on Sep 7, 2026.

Overview
Company
Impact
Profile match
L3Harris builds defence electronics, uncrewed maritime vessels and space systems. Its unmanned surface vehicles run long autonomous naval missions. The company is one of the largest United States defence contractors.

Job Title - Senior Network Engineer

Job Location - Farnborough, UK

Job ID - 30300

About this opportunity and L3Harris UK

From 11 UK sites, our team of nearly 1,000 people delivers unique capabilities across space, air, land, sea and cyber for military, security and commercial customers across the UK and worldwide.

The Global Technology and Business Solutions department (EMEA region), functions as a high-performance hub that delivers core IT capabilities across our organisation. We focus on measurable outcomes, leveraging standardised processes, data-driven decision making and customer-centric delivery to support innovation and growth.

The individual will work in a fast-paced environment with high expectations, global scope, and a collaborative team setting. Provide technical and engineering participation on the Corporate data network engineering & security team with a firm grasp of networking, routing, Firewalls.

A few of our employee benefits are:

  • Hybrid working where possible, three days onsite per week
  • Flexible or part-time working arrangements considered upon request
  • 25 days holiday per year (plus bank holidays), increasing with long service and with the opportunity to buy/sell up to 5 days
  • Private medical insurance with optional family cover
  • Pension scheme of up to 7% employer contribution
  • Life Assurance 4x salary (flexible up to 10x)
  • Group income protection
  • Flexible opt-in extras such as a health care cash plan, dental insurance, gym membership, critical illness cover and cycle to work scheme
  • Employee assistance program providing mental health and wellbeing support
  • Professional membership reimbursement (discretionary)

What the role will involve

The responsibilities of your role will include the following:

  • Interface with business leaders on strategic planning and design of Cloud and compute services, security, voice, data centre and NOC.
  • Providing technical expertise and support in troubleshooting issues and optimising performance.
  • Designs, troubleshoots, documents, implements - (2/3, VPC, VDC, Datacentre Zones, Spanning Tree, VRF, VTP, VLANs, & cabling) problem isolation and resolution.
  • Support day-to-day Firewall and Remote Access changes for Palo Alto Networks devices and services
  • Providing technical expertise and support in troubleshooting network issues and optimizing network performance.
  • Devises solutions to operational problems within the capacity and limitations of installed equipment.
  • Identifies equipment upgrade opportunities and coordinates acquisition, deployment, and implementation.
  • Identifies and recommends architecture network topology modifications, enhancements, overhauls, migration plans to solve capacity, resiliency, or changing business needs.
  • Supports network architectural, engineering review, change planning and other oversight discussions.
  • Create and maintain documentation for use by the network operations, CISO and support teams.
  • Support Tier 2-3 team to resolve complex issues.
  • Participate in on-call support, scheduled weekend outages, and disaster recovery activities as required
  • Respond to Cyber Security incidents and proactively engage with relevant stakeholders.
  • Primarily office based with occasional travel to other UK and EMEA sites.

What you’ll bring

The role requires the following experience and skills:

  • Bachelor’s Degree with 8 years of prior related experience or Graduate Degree with 6 years of prior related experience.
  • 5-10 years Network/IT Security experience at an Enterprise/large scale level
  • Experience using one or more of the following platforms: Palo Alto Firewall (physical and virtual), Palo Alto Networks services (threat, Prisma, GlobalProtect, etc.), cloud services (Azure, AWS)
  • Certifications such as CISSP, CISA, PCNSE, Security+, CCNA
  • Experience with SDWAN implementation and/or support.
  • Experience with logging and monitoring tools (Splunk, Spectrum, Thousandeyes, etc.)
  • Extensive knowledge and experience of Core Routing and Switching design, configuration, and troubleshooting.
  • Administration Experience with Hyperconverged technologies such as Nutanix, Cohesity etc
  • Windows/Linux server administration

Important to know

Due to the nature of our work many our roles require a UK nationality and the ability to obtain a security clearance. Applicants who accept a conditional offer of employment must meet the requirement of right to work in the UK and must meet eligibility requirements for access to classified information and will be subject to government security checks.

#LI-Hybrid

Free account
Stop reading job ads. Get the ones that fit.
One free account turns this page into a shortlist built around your stack, your level and your pay.
Match on every job. Stack, seniority, pay and location, scored against your profile.
1,227,840 open roles. Read straight off company career pages, refreshed every day.
Unlimited applications. Every one you send is tracked in one place, on-site or on a company board.
3 tailored CVs a month. Rewritten for the exact job you are applying to. Included free.
Create a free account Continue with Google
Free forever. No card. Under a minute.

Your match

How well do you fit this role?
Two answers are enough for a real match. No account needed.
Check my fit
Answers stay in this browser until you create an account.

Recommended for you based on this role

Networking
Similar stack
Same company
Farnborough
≈ $64k – $159k per year (Estimated) • Hybrid • Full-Time • London
Python
DevOps
gRPC
Ansible
Zabbix
Git
AWS
Grafana
GitHub
TCP/IP
BGP
OSPF
Cybersecurity
SIEM
Management
ClickUp
Jira
Apply
$37k – $70k per year • In office • Full-Time • 5+ years exp • Bachelor's Degree • United Kingdom
Databases
Databricks
DevOps
Rest API
AWS
Amazon S3
Amazon ECS
Amazon CloudWatch
Linux
Cybersecurity
Wireshark
Tcpdump
Apply
≈ $66k – $163k per year (Estimated) • In office • Full-Time • Birmingham
Python
DevOps
Azure
AWS
Amazon EC2
VPN
BGP
OSPF
Cybersecurity
FortiGate
Apply
≈ $33k – $84k per year (Estimated) • Hybrid • Full-Time • Manchester
DevOps
Red Hat
AWS
Incident Management
Linux
Apply
≈ $94k – $185k per year (Estimated) • In office • Full-Time • Bachelor's Degree • London
DevOps
Cloudflare
TCP/IP
DNS
DHCP
Cybersecurity
Zscaler
Zero Trust
Apply
Automation Engineer 11 hours ago
≈ $55k – $98k per year (Estimated) • In office
Python
PowerShell
Bash
DevOps
Terraform
Ansible
GCP
Red Hat
VMWare
Azure
Windows Server
AWS
Configuration Management
Linux
Apply
Intern - IT 10 hours ago
≈ $8k – $16k per year (Estimated) • In office • Internship • Bachelor's Degree • Bengaluru
Python
SQL
Python
pySpark
Databases
Databricks
AI/ML
LangGraph
LangChain
Spark
Embeddings
Prompt Engineering
AI Agents
RAG
OpenAI
DevOps
Rest API
GCP
Azure
CI/CD
Git
AWS
GitHub
Analytics
Tableau
Power BI
Management
Agile
Apply
DevOps Engineer 11 hours ago
≈ $12k – $32k per year (Estimated) • In office • 4+ years exp • Bengaluru
Python
Databases
ElasticSearch
DevOps
Terraform
GitHub Actions
CloudFormation
Datadog
Prometheus
GitLab CI
CI/CD
Jenkins
AWS
Docker
Kubernetes
Grafana
Platform Engineering
Amazon EKS
Amazon EC2
GitLab
Amazon S3
IAM
Amazon CloudWatch
Linux
DNS
Apply
≈ $45k – $99k per year (Estimated) • In office
SQL
PowerShell
Bash
Databases
MySQL
PostgreSQL
DevOps
Terraform
Ansible
GCP
Docker
Kubernetes
Linux
Windows
Apply
System Administrator 10 hours ago
In office • Full-Time • 3+ years exp • Bachelor's Degree • Cairo
SQL
Databases
MySQL
PostgreSQL
MS SQL
DevOps
VMWare
Windows Server
Hyper-V
Windows
Apply
$93k – $172k per year • In office • Secret • 10+ years exp • Rochester
IoT
ZeroTier
Apply
$81k – $150k per year • In office • Secret • 8+ years exp • Rochester
Apply
≈ $92k – $201k per year (Estimated) • In office • TS/SCI • 8+ years exp
Java
PHP
Perl
Databases
MySQL
DevOps
Red Hat
Linux
Windows
Unix
TCP/IP
DNS
DHCP
Cybersecurity
Active Directory
LDAP
Apply
≈ $86k – $187k per year (Estimated) • In office • Public Trust • 6+ years exp • Bachelor's Degree • Salt Lake City
Apply
≈ $89k – $195k per year (Estimated) • In office • Public Trust • 6+ years exp • Bachelor's Degree • Melbourne
Apply
Team Leader 8 hours ago
≈ $41k – $93k per year (Estimated) • In office • Full-Time • Farnborough
Apply
≈ $68k – $165k per year (Estimated) • In office • Farnborough
Python
Bash
AI/ML
InfiniBand
DevOps
Ansible
Red Hat
SLURM
GitOps
CentOS Stream
GitLab
HPC
Linux
Unix
Apply
≈ $71k – $164k per year (Estimated) • In office • Farnborough
DevOps
CI/CD
Cybersecurity
ISO 27001
SIEM
Apply
≈ $41k – $93k per year (Estimated) • In office • 5+ years exp • Bachelor's Degree • Farnborough
Apply
$41k – $61k per year • In office • Farnborough
Python
Bash
AI/ML
MLFlow
Kubeflow
ClearML
InfiniBand
NVLink
DevOps
Ansible
Red Hat
OpenShift
Loki
Prometheus
SLURM
Git
Kubernetes
Ubuntu
Grafana
HPC
Linux
Apply
See all jobs
This is one of many
1,227,840 more open roles from verified company boards, updated every day.