Network Manager in London

The Technology Department delivers differentiation, scalability and security for the business. Technology provides digital tools, software services and infrastructure globally to all business groups. Software development and support teams work in agile streams aligned to specific business areas, while other teams deliver critical enterprise-wide services such as global service desk, network and system infrastructure, IT operations and security.

The network team is responsible for designing, building, and operating our global network infrastructure that connects our offices, data centres, cloud environments, and remote users. They ensure secure, reliable, and high‑performing connectivity to support the needs of our rapidly growing business. We are looking for an experienced Network Manager to lead this team, combining hands‑on leadership with strategic direction, overseeing stability, performance, and evolution of our enterprise network.

• Lead a global team of network engineers, providing direction, mentorship, and performance management.
• Own the end‑to‑end operation and stability of the global enterprise network across data centres, cloud, offices and remote users.
• Develop and implement strategies to ensure high network availability, reliability, and performance.
• Oversee and optimise network operations, including incident response, change management, monitoring, and proactive maintenance.
• Architect and maintain a scalable, secure, and modern network.
• Improve observability by leveraging tools for performance monitoring, fault detection, and root cause analysis.
• Collaborate closely with security and infrastructure teams to ensure alignment and integration across platforms.
• Contribute to capacity planning, scalability initiatives, and disaster recovery strategies to ensure future‑proof infrastructure.
• Support M&A integrations, including discovery, planning, and execution of network consolidation and onboarding strategies for newly acquired companies.
• Standardise network tools, policies and configurations across acquired entities to meet enterprise standards.
• Manage relationships with network vendors, handle renewals and identify cost/value optimisation initiatives.
• Continuously improve network processes and capabilities through automation, documentation and cross‑functional collaboration.
• Serve as a key escalation point during critical incidents and participate in post‑incident reviews with actionable outcomes.
• Provide network consultancy for different lines of business for new technical requirements.
• Ensure network projects are delivered on time and on budget.
• Plan resource allocation to ensure priorities are met.
• Track and manage the overall network budget.
• Adhere to the operational risk framework, ensuring compliance with regulatory and company parameters.
• Model the highest standards of integrity and conduct and reflect company values.
• Comply with FCA’s Code of Conduct at all times.

• Adhere to the operational risk framework, ensuring compliance with regulatory and company parameters.
• Model the highest standards of integrity and conduct and reflect company values.
• Comply with Marex’s Code of Conduct.
• Ensure awareness of and adherence to internal policies relevant to your role.
• Report any breaches of policy to Compliance or supervisor as required.
• Escalate risk events immediately.
• Provide input to risk management processes as required.

• Team Management and Leadership Experience (minimum 5 years).
• Previous experience within the finance industry.
• Proven experience in designing, implementing, and managing large‑scale networks.
• Strong understanding of cybersecurity principles related to networks.
• Project management skills from inception to delivery.
• Experience with global rollout of SASE, SSE solutions, Prisma Access, Zscaler.
• Cloud network design and implementation (AWS, Azure).
• Network automation, infrastructure‑as‑code, Ansible.
• NextGen Layer 7 firewalling, User‑ID, SSL decryption, network access control.
• Product knowledge of Palo Alto, Cisco, Arista, Juniper, Aruba (Wi‑Fi/Clearpass NAC).
• Understanding of WAN technologies: MPLS, IPSEC VPN, SD‑WAN, QoS, NAT.
• Routing and switching protocols: BGP, OSPF, EIGRP, Wi‑Fi, VLAN, multicast.
• WAN/Campus LAN network design and implementation.
• Internet, firewall and DMZ design and implementation.
• Understanding of exchange connectivity (e.g., CME, SGX, ICE, Eurex, LME).
• Experience working in a global organisation with distributed teams.
• Experience with Agile methodologies, Scrum or Kanban.
• ITIL v4 beneficial.

• Resilient in a challenging, fast‑paced environment.
• Strategic visionary with tactical thinking.
• Collaborative leader who thrives in a team‑oriented environment.
• Passionate about technology and innovation, committed to staying ahead of industry trends.
• Strong organisational skills, able to manage multiple priorities and projects simultaneously.
• Strong oral and written communication skills.
• Strong attention to detail and focus on delivering high‑quality results.
• Ensure awareness of and adherence to internal policies.
• Report any breaches of policy to Compliance or supervisor as required.
• Escalate risk events immediately.
• Provide input to risk management processes.
• Experience working in a regulated environment and knowledge of related risk and compliance requirements.

• Act with integrity.
• Act with due skill, care and diligence.
• Be open and cooperative with FCA, PRA and other regulators.
• Pay due regard to the interests of customers and treat them fairly.
• Observe proper standards of market conduct.
• Act to deliver good outcomes for retail customers.

• Respect – Clients are at the heart of our business. We treat customers fairly and with superior service.
• Integrity – We hold ourselves to a high ethical standard in everything we do.
• Collaborative – We work in teams, with open communication, and a willingness to drive effective teamwork.
• Developing our People – We grow our own talent and make Marex the place for ambitious, hardworking individuals.
• Adaptable and Nimble – Our flexibility and size allow us to respond rapidly to changing conditions while maintaining control and initiative.

Marex is fully committed to being an inclusive employer and providing an inclusive and accessible recruitment process for all. We will provide reasonable adjustments to remove any disadvantage to you being considered for this role. We value the differences that a diverse workforce brings to the company. We welcome applications from candidates returning to the workforce and from those for whom conflicts of interest may exist in the hiring process.