Sean S. Wijetunga
Network Reliability Engineer @Domestic & General
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WORK HISTORY
Network Reliability Engineer @Domestic & General
London, GB
Network Reliability Engineer operating in regulated environments, focused on Azure hybrid networking, service resilience, and operational governance.Currently supporting an on prem to Azure migration including Azure VMware Services, contributing to hybrid connectivity design, landing zone governance, and the modernisation of infrastructure through infrastructure as code and improved deployment controls.I work at the intersection of infrastructure stability and change delivery, leading incident response, strengthening observability, and ensuring platforms meet security, audit, and operational resilience standards.Background in financial markets infrastructure including production network ownership and vendor oversight. Increasingly focused on platform reliability, Terraform based automation, CI CD alignment, and modernising cloud environments to be scalable, secure, and well governed.
EDUCATION
Sheffield Hallam University
MSc, Information Systems Security 2010
Sheffield Hallam University
BSc (Hons), Computer Systems & Networks 2009
ABOUT SEAN S. WIJETUNGA
Senior Network Engineer with 14 years of experience delivering and operating low latency trading infrastructure across Bloomberg, Trayport and Broadridge. I specialise in market data and exchange connectivity, Cisco Nexus and Arista 7050x platforms, EVPN fabrics, multicast, Palo Alto firewalls and hybrid AWS networking for mission critical financial systems.My background is built around regulated and audit heavy environments where reliability, latency and structured change control processes are essential. I am familiar with strict governance requirements in financial markets and regulated SaaS, including evidence based change management, configuration standards and security controls. I have supported production trading and market data flows during live market hours, delivered multi site network upgrades without downtime and worked closely with compliance and audit teams to maintain operational integrity.Automation is a key part of my operational approach. I use Ansible to improve configuration consistency, governance alignment and auditability, with selective use of Terraform for AWS networking and supporting components when it improves repeatability and reduces risk.I take ownership of complex issues, provide leadership during high pressure incidents and work closely with SRE, security, compliance and governance teams to maintain resilient services. I provide technical leadership across project delivery, incident response and design discussions, act as the primary technical point of contact for production connectivity related issues and guide engineers and cross team partners on standards, troubleshooting and network design decisions. I am open to senior engineering and leadership focused roles that require strong technical judgement, operational reliability and governance awareness.
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