About Arc: Arc is a leading IT Managed Services Provider (MSP) based in the UK, delivering innovative and reliable IT solutions to businesses across various industries. With a strong reputation for excellence, we offer a range of services, including IT support, hybrid cloud solutions, cybersecurity, infrastructure management, PowerApps and AI. Our team is dedicated to delivering outstanding customer service and technical expertise to help businesses succeed. Role Overview: The Senior Network Engineer is responsible for the design, delivery, and ongoing support of complex customer and internal network environments, spanning datacentre, ISP, and on-premise infrastructures. The role involves taking full ownership of network installation projects, providing senior-level escalation support, and working closely with Network Management, Sales, and customers to deliver robust, secure, and scalable solutions. This position also requires proactive network monitoring, maintenance, and participation in a 24x7 support rota, with occasional out-of-hours work to meet customer and operational requirements. This role will entail a mix of office/home based work as well as customer site visits for installation/support Key Responsibilities To take ownership of installation projects, and liaise with Network Manager, Account Managers and Customers to deliver the installation project To carry out ongoing maintenance and development of the DC & ISP network Assist sales to answer technical questions for new customer proposals Assist with the maintenance of monitoring systems to provide alerting Pro-active maintenance relating to software and firmware updates of networking equipment Occasional out of hours tasks depending on customer requirements on downtime around support and install tasks Included within the 24x7 OOH call rota To provide Network support for escalated tickets from Primary Helpdesk Team - remote & onsite if necessary Required Skills & Experience: Strong Networking background and understanding of the following technologies Layer 2 understanding (ARP, MAC) IP Addressing & subnetting Spanning Tree Strong understanding of Layer 3 routing protocols OSPF EIGRP BGP Strong troubleshooting skills VPN Technologies IPSEC site to site SSLVPN Exposure to a range of Firewall vendors such as: FortiGate & FortiManager Sophos XG Cisco ASA / Firepower Watchguard Demonstratable skills in managing firewalls and relating technologies such as: Zone based firewalling NAT Web, IPS & AV filtering policies Device / User authentication integration Strong Switching skills and multi-vendor exposure Cisco IOS HP Aruba VLAN creation, management and trunking/tagging Cabling/connector types (Copper Cat5/6 & fibre cabling types) Wireless installation and support Experience with Ubiquiti Unifi and Meraki based deployments Experience working with and managing Datacentre networks Understanding of different Internet connectivity types – FTTC/FTTP/Leased Line Experience with Windows servers and roles such as AD/DHCP/DNS/NPS Experience with Hyper-V / VMWare technologies Excellent customer facing manner Previous experience in a similar IT role Cisco CCNP and any other network qualifications would be an advantage Full UK Driving license What We Offer: A dynamic and supportive working environment. Opportunities for career progression within the company. Ongoing training and professional development. Competitive salary Key Points: Diversity & Inclusion: We celebrate diverse backgrounds and perspectives; they make us stronger. If you’re excited about this role, apply even if your experience doesn’t align perfectly. If not this one, you could be just the right fit for other roles we are recruiting for. We are an equal opportunity employer and value diversity at our company. We do not discriminate on the basis of race, religion, colour, national origin, gender, sexual orientation, age, marital status, veteran status, or disability status. UK Right to Work: All applicants must have the right to live and work in the UK. We cannot offer sponsorship at this time. Accessibility: We are committed to providing reasonable adjustments for any candidates with disabilities. If you require adjustments, please outline these requirements in your application.