Network Engineer

Senior Network Engineer / L3 Network Engineer (Security-Focused) Warrington, UK (Hybrid - 4 days onsite, 1 day remote) Total Package: £64,000 - £65,000 Monday-Friday | No nights or weekends | 1-in-4 on-call About the Role We're looking for an experienced Senior Network Engineer with a strong security focus to join a technically driven, customer-facing managed services team. This is a true L3 role, where you'll act as a senior escalation point for complex network and security incidents, work directly with customers, and help shape how enterprise networks are designed, secured, and operated. You'll be hands-on with modern Cisco technologies across LAN, WAN, SD-WAN, wireless, and security, and play a visible role in improving service quality, stability, and automation. If you enjoy solving difficult problems, mentoring others, and working in an environment where technical excellence is genuinely valued, this is a role where you can make a real impact. Who We Are We're a specialist network infrastructure and managed services provider, trusted by organisations across sectors such as logistics, manufacturing, retail, hospitality, public sector, and chemical industries. As a Cisco partner, we focus on intent-based networking and helping customers move away from reactive, break-fix operations towards secure, resilient, and intelligent network environments. Our work spans everything from structured cabling and passive optical LAN through to enterprise switching, SD-WAN, wireless, and network security. Our managed services practice is where we truly differentiate. We support customers running mission-critical networks, act as master systems integrators on large automation projects, and help organisations address skills gaps while improving visibility, reliability, and security. You won't be joining a large corporate machine - you'll be part of a collaborative, highly technical team where your voice is heard, your growth is supported, and your expertise matters. What You'll Be Doing L3 Network & Managed Services Support * Act as L3 escalation for complex issues across LAN, WAN, SD-WAN, and hybrid cloud environments

• Support multiple customer networks in a fast-paced MSP environment * Work across multi-vendor infrastructures, primarily Cisco, with exposure to Fortinet and Juniper * Support onboarding, migrations, and network transformation projects Security Operations (Client-Facing) * Troubleshoot and manage firewalls, VPNs, WAFs, IDS/IPS * Investigate and respond to real-time security alerts and incidents * Ensure customer environments align with security policies, standards, and compliance frameworks Incident, Problem & Change Management * Serve as the final escalation point for P1 / P2 incidents * Lead incident bridges with customers and internal teams * Perform root cause analysis (RCA) and produce clear, client-facing reports * Implement changes in line with ITIL-based change management Service Delivery & Continuous Improvement * Ensure incidents and requests meet SLA / OLA commitments * Provide technical input into service reviews and reporting * Identify opportunities for automation, optimisation, and service improvement Proactive Monitoring & Optimisation * Analyse monitoring alerts to prevent customer impact * Fine-tune monitoring thresholds per environment * Optimise performance, availability, capacity, and security posture Automation, Documentation & Mentoring * Develop scripts and automation for repetitive operational tasks * Contribute to configuration standardisation across clients * Maintain high-quality documentation and runbooks * Mentor L1/L2 engineers and support their technical development What We're Looking For Core Technical Skills CCNP Enterprise / Security (or equivalent hands-on experience) Strong enterprise Cisco firewall experience (FTD/FMC) Hands-on knowledge of Cisco ISE, DNAC, SDA, and SD-WAN Advanced networking fundamentals: TCP/IP, routing & switching (BGP, OSPF, MPLS, VLANs, STP) Experience with SD-WAN solutions (Viptela, Meraki, Fortinet) Exposure to cloud networking (AWS, Azure, GCP)

Experience with monitoring tools such as Zabbix Security & Compliance * Strong grasp of network security principles * Experience handling live security incidents * Familiarity with SIEM platforms (Splunk, QRadar, Sentinel - desirable) * Understanding of ISO 27001, NIST, GDPR Soft Skills Confident, professional client-facing communication Calm and effective during high-severity incidents Strong attention to detail and documentation discipline Ability to manage priorities across multiple customers Natural mentor and technical leader Experience & Qualifications 3+ years' experience in networking/security, ideally within an MSP or service provider Degree in IT, Computer Science, or equivalent experience ITIL Foundation (or willingness to obtain) Package & Benefits £60,000 basic salary + £4,000-£5,000 on-call allowance Total package: £64,000-£65,000 1-in-4 on-call rota (no nights, weekends, or shift work) Hybrid working model Paid certifications and ongoing

technical development 25 days holiday + bank holidays Employer pension contribution (3%) Company sick pay & EAP scheme "A Day to Make a Difference" volunteering initiative Refer-a-Friend bonus up to £2,500 Why Join Us? You'll work on complex, real-world networks, gain exposure across a wide technology stack, and be part of a team that genuinely values engineering quality over ticket-churning. If you're looking for a senior role where you can influence outcomes, grow your skills, and be trusted as an expert, this is the opportunity for you