Senior Network Engineer

eFinancialCareers; Greater London; On-site; GBP 60,000 - 90,000; Full time

Job summary

eFinancialCareers in London is seeking a network security professional to manage Palo Alto firewalls, Zscaler, and SCM within a complex estate. You will handle policy administration, incident response in ServiceNow, and hands-on troubleshooting.

Ideal candidates hold CCNA/CCNP-level credentials, with exposure to AWS networking, monitoring tools like LogicMonitor, and scripting (Python) to enhance monitoring coverage across systems.

Qualifications

• Palo Alto NGFW firewall rule administration via Panorama.
• Policy and object management in Palo Alto Strata Cloud Manager (SCM).
• Zscaler ZIA and ZPA policy administration, access requests, and basic troubleshooting.
• ServiceNow incident, request, and change ticket management.
• CCNP-level routing and switching knowledge, with core networking fundamentals: TCP/IP, DNS, VLANs, OSPF/BGP basics.
• Basic troubleshooting using ping, traceroute, and packet capture.

Responsibilities

• Read and interpret firewall logs and basic packet captures to support issue diagnosis.
• Support monitoring/alerting coverage across the estate and help mature tooling.
• Engage with cloud networking fundamentals (AWS) as needed.
• Follow established change and security procedures accurately and without deviation.

Skills

Palo Alto

NGFW

Panorama

SCM

Zscaler ZIA/ZPA

ServiceNow

TCP/IP

DNS

VLANs

OSPF/BGP basics

Packet capture

SNMP monitoring

CCNA

PCNSA/PCNSE

Cisco IOS/NX-OS

LogicMonitor

Python

AWS fundamentals

Education

CCNA certification

Palo Alto PCNSA/PCNSE certification

Cisco IOS/NX-OS exposure

AWS fundamentals

Job description

Essential

• Palo Alto NGFW firewall rule administration via Panorama (essential)
• Palo Alto Strata Cloud Manager (SCM) - policy and object management (essential)
• Zscaler ZIA and ZPA - policy administration, access requests, and basic troubleshooting
• ServiceNow - incident, request, and change ticket management
• CCNP-level routing and switching knowledge, with solid core networking fundamentals: TCP/IP, DNS, VLANs, OSPF/BGP basics
• Basic troubleshooting using tools such as ping, traceroute, and packet capture
• Familiarity with SNMP-based network monitoring and alerting tools, with an interest in helping to mature and improve monitoring/alerting coverage across the estate
• Ability to read and interpret firewall logs and basic packet captures to support issue diagnosis
• CCNA or an equivalent networking qualification
• Palo Alto PCNSA/PCNSE certification, or actively working towards one
• Exposure to Cisco switching and routing (IOS/NX-OS)
• Exposure to network monitoring tools such as LogicMonitor
• Basic scripting or automation exposure (e.g. Python)
• Exposure to cloud networking (AWS) fundamentals

Competencies / Other Requirements

• Proactive, self-starting approach - looks to identify and improve processes, monitoring, and tooling rather than simply responding to tickets
• Methodical, process-driven approach with excellent attention to detail
• Willingness to follow established change and security procedures accurately and without deviation