Senior operational leader at the intersection of Engineering, SRE, Security, and Executive Leadership - responsible for incident command, change governance, and operational maturity across production environments.

• Leads enterprise-level response to critical production incidents affecting customers and internal systems
• Acts as executive liaison during major incidents, providing structured updates and impact analysis
• Chairs the Change Advisory Board, governing risk for all production changes
• Drives accountability through structured post-incident reviews and remediation tracking
• Acts as Product Owner for internal operational tooling; mentors engineers into senior roles

• Directed cross-functional response to major security incidents across a global cloud platform
• Improved detection workflows through alert automation; delivered executive-level reporting and trend analysis
• Represented Security Operations in customer audits; served as Linux & infrastructure SME

• Selected to lead architectural redesign and replacement of internal and public DNS infrastructure
• Delivered phased rollout with rollback safeguards; migrated public-facing DNS with zero major outage

• Orchestrated multi-team resolution of high-impact production incidents; reduced escalation risk through early SRE intervention

• Operational responsibility for 4,500+ Linux and Solaris servers in a 24/7 trading environment
• Delivered large-scale datacentre and storage migrations with minimal downtime; coordinated DR testing across business units

• Provides leadership during critical incidents affecting internal and customer-facing systems - coordinating engineering response, keeping stakeholders (including customers) updated, and driving post-incident follow-through on process, procedure, and documentation improvements
• Oversees the Change Management process and chairs the Change Advisory Board, which holds overall ownership of the change lifecycle
• Provides guidance and continuous improvement of the Incident Management process
• Mentors team members and cross-functional engineers to support career progression
• Acts as Product Owner for several internal tools, providing direction across their development lifecycle

• Coordinated technical response on security and major incidents; resolved escalations from other teams
• Investigated security incidents and determined appropriate resolution paths
• Reviewed existing alerts to automate information gathering, reducing analyst workload
• Updated alert creation process to encourage better inter-team communication
• Provided automated reporting around incident statistics for leadership visibility
• Represented the Security Operations team in customer audits
• Acted as Subject Matter Expert for Linux and network infrastructure-related incidents
• Updated and enhanced documentation; mentored junior team members

Seconded to the Systems Engineering team to replace the entire DNS infrastructure (internal and public-facing).

• Designed a test plan to simulate expected production load on the new service
• Iterated through architecture options to determine optimal fit; validated designs in lab environments
• Created engineering documentation detailing the new services, upgrade paths, and rollback procedures
• Created and executed a crawl/walk/run rollout plan; oversaw validation testing across the internal environment
• Replaced public-facing DNS servers with full validation testing, including edge cases - zero major outage
• Created support documentation enabling another team to provide first-line support post-handover

• Acted as incident and crisis manager, orchestrating multi-team effort to resolve time-critical situations
• Handled escalations from the SRE team to resolve issues before they became crises
• Followed up on post-incident reviews and drove organisation-wide change to prevent recurrence
• Provided technical leadership for the SRE team, responsible for the availability and performance of ServiceNow's cloud platform

• Maintained 500+ servers globally; liaised with global partners and datacentres for upgrades, additions, and decommissions
• Implemented Puppet across the global estate; integrated Nagios with Puppet for reliable monitoring deployment
• Set up LDAP/Kerberos centralised authentication; enhanced reliability with DNS-based failover using gdnsd
• Used RRDtool for performance analysis; documented all enhancements and changes

• BAU and on-call responsibility for 4,500+ Linux and Solaris servers in the EU, a large multi-site VMware estate, several VCS clusters, and Kerberos/NIS/DNS services
• Migrated services to new datacentres; upgraded servers to new global build standards with minimal downtime
• Migrated servers to upgraded storage - often with no reboots required
• Coordinated and conducted DR tests for business units
• Assisted Engineering in specification, architecture, and deployment of multiple system integration initiatives
• Maintained team and procedural documentation; mentored interns and graduate new joiners

• Designed and implemented a new backup solution using Symantec NetBackup with LTO5 drives for speed and native encryption
• Migrated standalone systems to a new corporate cluster to increase reliability; delivered knowledge transfer to the sysadmin team

• Created a custom JET wrapper to rebuild datacentres including separation of PCI and non-PCI environments, with automated LDOM and zone installs
• Implemented RBAC policy; migrated from NIS to LDAP; installed and configured AIDE for system auditing

• Implemented a custom JET wrapper to build a new production environment across multiple datacentres, including Sun Cluster and zones
• Created a JET wrapper to build RAC (10.2.0.4) on Sun Cluster in under 4 hours - from initial boot to a running database
• Set up 2 Oracle RAC clusters across 2 M8000s on the primary site and a RAC cluster on the DR M8000
• Delivered training and documentation to enable the team to use all tools created during the engagement

• Migrated high-traffic websites to a highly available configuration on new servers while changing the underlying infrastructure
• Prepared kit for DR; ran DR tests; configured NetBackup for newly purchased VTL setup

• Reviewed the existing production environment for security and operational issues
• Built a Pre-Production ITSM (BMC Remedy) environment mirroring production; reconfigured production as a cluster for end-user resilience