Salary: £55,000 - 70,000 per year Requirements: Extensive hands-on experience with Juniper routing/switching platforms. Strong proficiency with Palo Alto Networks firewalls and associated security technologies. Deep understanding of Layer 2 & Layer 3 protocols (BGP, OSPF, STP, VXLAN, EVPN etc.). Experience in designing and supporting large-scale enterprise or service provider networks. Knowledge of network security principles and best practices. Strong troubleshooting and packet-level analysis skills. Experience with change control and ITIL processes. Certifications such as JNCIP/JNCIE, PCNSE, CCNP/CCIE or similar (desirable). Knowledge of automation (Python, Ansible, Terraform) (desirable). Exposure to SD-WAN, SASE or cloud networking (Azure/AWS) (desirable). Experience with monitoring tools (SolarWinds, PRTG, Junos Space, Panorama) (desirable). Responsibilities: Design, implement, and optimize enterprise network solutions across multi-site environments. Configure, maintain, and troubleshoot Juniper routing & switching platforms (EX, MX, QFX series). Manage, configure, and support Palo Alto NGFWs, including security policies, threat prevention, URL filtering, and GlobalProtect. Lead network migration, refresh, and enhancement projects. Monitor network performance, analyze capacity, and proactively address issues. Collaborate with security teams to implement best-practice firewall and segmentation strategies. Maintain accurate network documentation including diagrams, configurations, and change records. Mentor junior engineers and act as SME for escalations. Technologies: AWS Ansible Azure Cloud Firewall Support ITIL Network Python Security Terraform More: We are a dynamic company located in London offering flexible working options as part of a collaborative environment. Our team is focused on using cutting-edge networking and security technologies, and we prioritize career development, training, and certification support for our employees. We are seeking an experienced Senior Network Engineer to join our growing team, where your expertise will truly make an impact. last updated 7 week of 2026