Network Security Engineer

Network & Security Specialist

Location: London, Onsite
Type: Permanent
Salary: £65,000 - £75,000

An experience Network and Security engineer is required for a globally recognised organisation in the energy and trading sector, known for its high-performance culture and cutting-edge technology environment. This is a rare opportunity to join a well-funded, international business with a strong London presence, where technology plays a central role in driving operational excellence.

They are seeking a well-rounded Network & Infrastructure Security Specialist to join a small, collaborative IT Team and take ownership of the company's network and infrastructure estate, while also contributing to proactive security improvements.

You'll be the technical lead for all things network and infrastructure -designing, implementing, and maintaining robust infrastructure to support a fast-paced, mission-critical environment. You'll also collaborate with support and infrastructure teams to ensure seamless operations and rapid incident response.

• Design and implement strategic plans for network and security infrastructure
• Lead threat detection and response using tools like SIEM, Sophos MTR, and Splunk
• Manage Firewalls, VPNs, intrusion detection systems, and endpoint protection
• Conduct annual penetration testing and remediate vulnerabilities
• Support disaster recovery planning and incident response
• Provide BAU support and mentor junior IT staff

• Security: Checkpoint, Cisco ISE, Zscaler, Sophos MDR, Mimecast, Okta, Fortinet
• Networking: Cisco Catalyst/Nexus, Proxy (Squid/Pfsense), CUCM
• Infrastructure: VMware, Dell VxRail, Rubrik, RecoverPoint
• Monitoring: LogicMonitor, Security Scorecard, Horizon 3.AI NodeZero
• OS & Platforms: Windows Server 2025/2022, Linux, Exchange 2016/2019, SQL Server

• Hands-on experience in network and infrastructure support
• Strong knowledge of Cisco and Checkpoint technologies
• Proficient working within a VMware environment
• Comfortable working in a regulated, high-availability environment
• Excellent troubleshooting skills and a sleeves-rolled-up attitude
• Certifications - minimum of CCNA. CCNP is desirable

• Join a prestigious global business with a strong London base
• Work in a collaborative, technically advanced environment
• Opportunity to shape the future of IT security in a mission-critical role