Data Centre Network Operations Specialist (L2/L3)

We are seeking an experienced Network Operations Specialist to provide L2/L3 operational support for our global Data Centre and DMZ network infrastructure., * Provide L2/L3 operational support for global Data Centre and DMZ network infrastructure.

• Lead and coordinate incident triage, troubleshooting and resolution of complex network issues.
• Assess incident severity, business impact and service risk, ensuring effective prioritisation and timely escalation.
• Manage major incident bridge calls, engaging relevant technical teams and stakeholders to drive service restoration.
• Provide clear, accurate and timely incident updates, technical reporting and stakeholder communications.
• Identify root causes, recurring issues and potential network vulnerabilities, driving appropriate corrective actions.
• Monitor network performance, alerts, dashboards and logs to proactively identify and resolve potential issues.
• Maintain accurate incident records, technical documentation, troubleshooting guides and operational runbooks.
• Work closely with L2/L3 engineers, infrastructure teams and vendors to resolve complex network incidents.
• Support operational governance, ensuring changes, fixes and recovery activities follow established production procedures.
• Provide technical guidance and support to junior engineers where required.
• Participate in a global support model, including weekend and out-of-hours support.

The role is heavily focused on production support, incident management, technical troubleshooting and service restoration. The successful candidate will have strong hands-on experience across Cisco networking technologies, with the ability to lead incident triage, assess business impact, prioritise issues and drive resolution across technical teams., * Strong hands-on experience supporting and troubleshooting Cisco networking technologies, particularly:

• Cisco ASR and ISR Routers.
• Cisco Nexus and Catalyst Switches.
• Proven experience in L2/L3 network operations and production support environments.
• Strong incident management experience, including triage, prioritisation, escalation and service restoration.
• Experience managing complex network incidents and coordinating technical troubleshooting across multiple teams.
• Strong understanding of networking protocols and technologies, including:
• TCP/IP, IPv4, VLANs and Layer 2 protocols.
• BGP, OSPF and EIGRP.
• HSRP, ACLs, QoS and Multicast.
• Routing, switching and Internet connectivity.
• VPN, IPSEC, GRE and MACSEC.
• Experience with network monitoring and troubleshooting tools such as Splunk, SevOne, Wireshark, Netscout and similar platforms.
• Strong analytical and problem-solving skills, with the ability to work under pressure in a production environment.
• Excellent written and verbal communication skills, particularly incident reporting and stakeholder management.
• Strong ownership and accountability, with a focus on minimising service disruption and restoring services quickly.
• Flexible approach to working hours, including weekend support.

Desirable Skills

• Experience with Arista Switches and Arista CloudVision.
• Knowledge or experience of Cisco ACI.
• Experience supporting global Data Centre and DMZ environments.
• Familiarity with network automation and configuration management tools.
• Experience within Financial Services, Banking or Insurance.
• Relevant Cisco or other networking industry certifications.