Head of Infrastructure in London

Energy Jobline ZR; City Of London; On-site; GBP 90,000 - 130,000; Full time

Job summary

A leading trading firm is looking for an experienced Head of Infrastructure to oversee cloud migration and manage their IT infrastructure. The ideal candidate will have over 7 years of experience in cloud architecture and a strong background in trading systems. Responsibilities include leading cybersecurity initiatives and seamless system integration, while fostering a high-performing team culture.

Qualifications

• 7+ years of experience in infrastructure, cloud architecture, or DevOps.
• Proven experience managing infrastructure or DevOps teams.
• Hands-on expertise in AWS architecture and migration.
• Deep technical background in network design and optimization.
• Strong understanding of network performance for trading systems.

Responsibilities

• Lead the design and management of cloud infrastructure.
• Oversee AWS migration ensuring security and scalability.
• Build and integrate greenfield infrastructure environments.
• Manage the full IT infrastructure stack.
• Lead cybersecurity initiatives for safe operations.
• Monitor and optimize system performance and costs.

Skills

AWS architecture

Cloud migration

Infrastructure management

Networking

DevOps

Cybersecurity

Automation

Scripting (Python, Bash)

Tools

AWS (EC2, IAM, S3, etc.)

Wireshark

GitLab CI

Prometheus

Grafana

Job description

Job Description

Energy Jobline is the largest and fastest growing global Energy Job Board and Energy Hub. We have an audience reach of over 7 million energy professionals, 400,000+ monthly advertised global energy and engineering jobs, and work with the leading energy companies worldwide.

We focus on the Oil & Gas, Renewables, Engineering, Power, and Nuclear markets as well as emerging technologies in EV, Battery, and Fusion. We are committed to ensuring that we offer the most exciting career opportunities from around the world for our jobseekers.

Head of Infrastructure

Location: London

Experience: 7+ Years

Industry: Market Making / Proprietary Trading / Capital Markets

Strong preference will be given to applicants from a buy side / trading / capital markets background

A leading trading firm is seeking an experienced Head of Infrastructure to lead and scale its UK and global trading infrastructure. This senior leadership role will drive the firm’s AWS migration from on-premise systems, build greenfield environments, integrate them with existing platforms, and oversee both cloud and on-prem IT operations.

Key Responsibilities

• Lead the design, implementation, and management of cloud infrastructure
• Oversee AWS migration from on-premise infrastructure, ensuring scalability, security, and high availability
• Build out greenfield infrastructure environments and plan seamless integration with existing systems
• Own the full IT infrastructure stack, including Active Directory, Microsoft services, networking, and on-prem systems
• Configure and maintain firewalls, routers, and switches to ensure security, reliability, and optimal performance across production and disaster recovery environments
• Lead cybersecurity initiatives focused on network segmentation, access control, and intrusion prevention
• Build, mentor, and manage a high-performing infrastructure and DevOps team, fostering a culture of excellence, automation, and reliability
• Partner with software engineers, quantitative researchers, traders, and risk teams to deliver stable, scalable, and secure infrastructure solutions
• Drive automation initiatives using CloudFormation and Ansible to enhance resilience, reduce operational overhead, and maintain compliance with regulatory and security standards
• Monitor and optimise system performance, cost, and reliability across production, staging, and development environments

Ideal Candidate Profile

• 7+ years of experience in infrastructure, cloud architecture, or DevOps within high-performance trading or capital markets environments
• Proven experience building and leading infrastructure or DevOps teams
• Hands‑on expertise in AWS architecture, migration, and hybrid (cloud + on‑prem) environments
• Deep technical background in network design, routing, switching, and firewall configuration
• Strong understanding of network latency, throughput, and optimisation for trading systems
• Familiarity with network monitoring and troubleshooting tools (e.g., Wireshark, NetFlow, Nagios, SolarWinds)
• Excellent communication and stakeholder management skills, with the ability to align technology with business objectives

Core Skills & Technologies

• Advanced AWS expertise (EC2, Lambda, VPC, IAM, S3, CloudFormation, CloudTrail, Direct Connect, Transit Gateway, etc.)
• Configuration management and automation using CloudFormation
• CI/CD pipeline management with GitLab CI
• Advanced networking: BGP, OSPF, VLANs, VPNs, MPLS, SD-WAN, and cross-region connectivity
• Firewall administration (Cisco ASA or similar) and network access control
• Monitoring, logging, and observability (Prometheus, Grafana, CloudWatch, ECS, etc.)
• Linux and Windows systems administration
• IT infrastructure management: Active Directory, Microsoft services, networking, and on-prem systems
• Security, compliance, and disaster recovery in cloud and hybrid environments
• Strong scripting and automation skills (Python, Bash, or similar)

If you are interested in applying for this job please press the Apply Button and follow the application process. Energy Jobline wishes you the very best of luck in your next career move.