CMC Markets is looking for an experienced Senior Network & Security Engineer to join our Technology team. This role plays a key part in designing, building and supporting our global network infrastructure, ensuring high performance, resilience and security across on-premise and cloud environments.
You will work across both project delivery and business-as-usual operations, supporting critical trading platforms in a fast-paced, regulated environment.
Key Responsibilities
Design, implement and maintain CMC Markets’ global LAN, WAN and cloud network infrastructure
Deliver network engineering and design for new initiatives, alongside ongoing BAU growth and optimisation
Monitor network performance, capacity and availability, providing proactive support and troubleshooting
Implement new network services in line with internal policies, standards and security requirements
Identify, advise on and remediate network and security risks
Maintain secure VPN connectivity with external partners, ensuring alignment with current best practices
Perform BAU changes and troubleshooting on Palo Alto and Cisco ASA firewalls
Lead investigation and resolution of network and security incidents
Collaborate closely with internal technology teams to resolve connectivity issues
Maintain accurate technical documentation and diagrams
Ensure all work is delivered in line with CMC Markets’ policies, procedures and compliance obligations
Skills & Experience
Essential
Strong experience operating and troubleshooting Cisco ACI environments
Hands-on experience with multicast networking
CCNP-level networking knowledge or certification
Proven experience designing and building data centre and cloud networks
Solid knowledge of Cisco Catalyst and Nexus switch platforms
Excellent documentation, communication and stakeholder engagement skills
Desirable
Experience supporting Market Data network feeds
Exposure to SD-WAN technologies
Experience supporting low-latency production networks within trading or financial services environments
Experience with Cisco ASA and Meraki Wireless
Hands-on experience with Palo Alto firewalls
At CMC Markets, you’ll work with cutting-edge technology in a collaborative environment where reliability, security and performance are critical. If you’re passionate about networking and thrive in complex, high-availability environments, we’d love to hear from you.
Senior Network and Security Engineer • London
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