Senior Network Engineer

Lockton Companies; London; On-site; GBP 70,000 - 100,000; Full time

Job summary

A leading insurance broker is seeking a Senior Network Engineer skilled in enterprise network design and security. The role involves managing complex network infrastructures, utilizing advanced technologies such as Palo Alto firewalls and F5 load balancers, while ensuring high availability and security. Candidates should possess strong problem-solving skills and relevant certifications.

Qualifications

• Significant experience in enterprise networking.
• Hands-on expertise in Palo Alto and Cisco technologies.
• Knowledge of cloud networking (Azure, AWS, GCP) is a plus.

Responsibilities

• Deploy and manage network infrastructure.
• Enhance security and performance tuning.
• Collaborate for IT modernization initiatives.

Skills

Enterprise network design

Network implementation

Security

Palo Alto firewalls

Cisco SD-WAN

Routing protocols

F5 load balancing

Network automation

Education

Bachelor’s or Master’s degree in Computer Science

Tools

F5 BIG-IP

SolarWinds

Wireshark

Job description

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Lockton is the world’s largest independent insurance broker. Dedicated to delivering innovative solutions and exceptional service. We have a fantastic opportunity for a skilled Engineer to join our team and contribute to our mission of excellence.

Job Summary

We are looking for a Senior Network Engineer with significant experience in enterprise network design, implementation, and security, with expertise in Palo Alto firewalls, Cisco SD-WAN and networking, Aruba wireless, and F5 load balancing solutions.

The ideal candidate will be responsible for deploying, managing, and optimizing network infrastructure, ensuring high availability, security, and scalability.

As a Senior Network Engineer, you will play a key role in network troubleshooting, security enhancements, and performance tuning, while collaborating with cross-functional teams to support business continuity and IT modernization initiatives.

Key Responsibilities

· Security & Firewall Administration

· Wireless & LAN Infrastructure

· Documentation & Process Improvement

Significant experience in enterprise networking, with hands-on expertise in:

• F5 BIG-IP (LTM, GTM, ASM) for load balancing
• Strong knowledge of routing protocols (BGP, OSPF, EIGRP) and switching technologies.

Experience with firewall rule configurations, VPN setups, and intrusion prevention systems.

Familiarity with network automation (Python, Ansible) and monitoring tools (SolarWinds, PRTG, Wireshark).

Strong problem-solving and troubleshooting skills, with the ability to analyze packet captures and performance logs.

Preferred

Certifications: CCNP, PCNSE (Palo Alto), F5-CA or F5-CTS, Aruba Certified Professional (ACP).

Experience with cloud networking (Azure, AWS, GCP) and hybrid cloud architectures.

Knowledge of Zero Trust Security Models and SIEM integration.
Education

Bachelor’s or Master’s degree in Computer Science, Information Technology, or a related field (or equivalent work experience).