3rd Line IP Network Engineer | AspireCom Recruitment | London, United Kingdom

A growing Managed Service Provider is seeking an experienced 3rd Line IP Network Engineer to join its technical operations team in London. This role is ideal for a senior networking professional who thrives in complex multi-vendor environments and enjoys acting as an escalation point for critical network incidents while supporting enterprise customers across diverse networking technologies., As a 3rd Line IP Network Engineer, you will provide advanced technical support and serve as the highest point of escalation for complex network-related incidents across customer environments. You will work closely with internal teams, customers, vendors, and third-party providers to troubleshoot and resolve issues involving SD-WAN, LAN, WAN, wireless networks, firewalls, and managed network services. The successful candidate will support network upgrades, infrastructure changes, performance optimization, and operational improvements across a range of technologies including Cisco, Juniper, Fortinet, and Meraki solutions. This role combines hands-on troubleshooting, customer engagement, and technical leadership within a fast-paced MSP environment. Occasional out-of-hours support may be required to support critical infrastructure activities and maintenance windows., * Provide 3rd line technical support and escalation management for enterprise network environments.

• Troubleshoot and resolve complex LAN, WAN, SD-WAN, wireless, and security-related issues.
• Support and maintain customer network infrastructure across multi-vendor environments.
• Act as the primary escalation point for service desk and NOC teams.
• Diagnose routing, switching, firewall, and connectivity issues across diverse network architectures.
• Coordinate with customers, vendors, carriers, and third-party service providers to resolve incidents.
• Implement network changes, upgrades, patches, and maintenance activities.
• Monitor network performance and proactively identify opportunities for optimization.
• Participate in incident response, root cause analysis, and problem management activities.
• Maintain technical documentation, network diagrams, and operational procedures.
• Support change management processes and ensure service continuity.
• Contribute to continuous improvement initiatives and service quality enhancements.
• Provide technical expertise during customer meetings and service reviews.
• Support out-of-hours maintenance and emergency activities when required.

• 5+ years of experience in a Service Desk, NOC, Network Operations, or Technical Support environment.
• Experience working within ISP, MSP, or SME network environments.
• Strong hands-on networking background with advanced troubleshooting skills.
• Excellent understanding of TCP/IP networking principles and enterprise network architectures.
• Strong experience with routing and switching technologies.
• Hands-on experience supporting SD-WAN environments.
• Experience administering and troubleshooting enterprise firewall platforms.
• Strong knowledge of wireless networking technologies and deployments.
• Experience supporting Cisco networking solutions.
• Experience with Juniper networking platforms.
• Experience managing Fortinet security and networking solutions.
• Experience supporting Cisco Meraki networking and wireless environments.
• Strong analytical, problem-solving, and fault-finding skills.
• Excellent verbal and written communication skills.
• Ability to manage multiple priorities within a customer-focused support environment., * Cisco Certified Network Associate (CCNA) certification.
• Cisco Certified Network Professional (CCNP) certification.
• Juniper Networks certifications.
• Fortinet NSE or related certifications.
• Experience with network automation and scripting tools.
• Knowledge of cloud networking within AWS, Azure, or hybrid environments.
• Exposure to ITIL service management frameworks.
• Experience supporting large-scale enterprise or managed service customer environments.

Salary: £50,000 per annum

• 20% Annual Bonus
• £2,500 Training Budget
• Comprehensive Benefits Package

Experience Required: 5+ Years

Industry: Managed Services Provider (MSP)