Network And Infrastructure Engineer; Security Focused

Network and Infrastructure Engineer is responsible for the monitoring, support, security and operational stability of the firm’s network, infrastructure, and core IT services. Operating within a regulated legal environment, this role places strong emphasis on service availability, security, vulnerability management, incident response and regulatory compliance
, ensuring systems remain resilient and available to support fee earners and business‑critical legal services.

A key focus of the role is security and vulnerability remediation
, requiring strong hands‑on experience in identifying, tracking and remediating vulnerabilities using industry-standard monitoring and security tools.

The role operates as a first and second line operational support function
, acting as a point of escalation for the IT Service Desk and working closely with Network, Security, Applications and Service Delivery teams, as well as third‑party suppliers.

• Monitor network, server, cloud and security platforms using NOC and monitoring tools (e.g. dashboards, alerting, SIEM outputs).
• Identify, diagnose and respond to incidents affecting:
  • WAN, LAN and Wi‑Fi
  • SD‑WAN and VPN connectivity
  • Firewalls
  • Cloud connectivity and SaaS services
• Proactively investigate alerts to prevent service degradation or outages.
• Perform routine system health checks, maintenance and operational validation.

• Act as an escalation point for incidents and service requests from the IT Service Desk.
• Support incident resolution across network, infrastructure and security domains, escalating where required.
• Identify recurring issues and contribute to problem management and continuous improvement.
• Support change windows, including:
  • Pre‑change readiness checks
  • Post‑change validation and assurance
• Work collaboratively with project teams to plan, test and implement technical changes as required.

• Monitor for security‑related events and collaborate closely with the Information Security and SOC function.
• Support vulnerability remediation activities, including:
  • Coordinating and validating patching activities
  • Tracking remediation actions and residual risk
  • Supporting vulnerability scanning and reporting (e.g. Tenable)
• Assist with security incident response, diagnosis, containment and remediation.
• Ensure operational practices align with firm security policies, ISO 27001, Cyber Essentials Plus, and client security requirements.
• Support access control verification, logging, audit evidence gathering and compliance reviews.

• Maintain accurate and up‑to‑date documentation, including runbooks, operating procedures and network diagrams.
• Recommend monitoring, tooling or process improvements to improve service resilience and security.
• Support onboarding of new offices, network services or infrastructure changes.
• Liaise with third‑party suppliers and telecoms providers during incident and fault resolution.
• Share knowledge across the IT team, ensuring information is current, accessible and reusable.

• Proven experience in a NOC, network operations, or infrastructure support role.
• Experience supporting business‑critical systems in a high‑availability environment.
• Strong working knowledge of ITIL incident, problem and change management.
• Hands‑on experience with security monitoring and vulnerability remediation activities.

Strong understanding of:

• TCP/IP, DNS, DHCP, routing and switching
• LAN, WAN and SD‑WAN technologies
• Firewalls and VPN technologies

Experience with:

• Monitoring and alerting platforms and dashboards
• Security and vulnerability tools (e.g. Tenable, Microsoft Sentinel, SIEM platforms)
• Microsoft technologies, including:
  • Windows Server and Windows 10/11
  • Active Directory, Group Policy
  • Microsoft 365 and Exchange Online
  • SCCM and Intune
• Infrastructure and enterprise services, including:
  • VMware (virtualisation and VDI)
  • Palo Alto firewalls
  • Email and security platforms (e.g. Mimecast, endpoint protection)
  • Telephony, mobile device management and AV solutions
• Cloud and hybrid technologies:
  • Azure and/or AWS
  • IaaS, PaaS and…