Progressed from Systems Administrator to Infrastructure Engineer to Senior Infrastructure Engineer. Led AWS WAF, Landing Zone→Control Tower, and SFTP-to-Transfer-Family architecture design and delivery.

• Evaluated migration approaches and independently designed and delivered the migration of a business-critical SFTP service from a private vendor cloud to AWS EC2 using AWS Application Migration Service (MGN), partnering with a business analyst to align the target architecture with business requirements.
• Currently architecting the next phase — a serverless, identity-integrated target architecture spanning Lambda, DynamoDB, S3 and Route 53 to replace the EC2-hosted SFTP service with AWS Transfer Family.
• Designed and implemented an AWS WAF architecture using AWS CDK (TypeScript), deployed centrally via AWS Firewall Manager, coordinating the design with AWS and CRUK engineers.
• Contributed technical analysis and presented migration scenarios for the multi-account AWS estate, supporting the move from a static account structure to AWS Landing Zone and then AWS Control Tower.
• Led the organisation-wide Confluence 6→7 migration; improved deployment processes with Jenkins and Ansible; deployed Prometheus/Grafana monitoring on Docker and Linux.
• Early tenure: administered RHEL/Ubuntu systems running Tibco and Siebel CRM, including LVM and storage administration, backups, NFS and permissions/ACL/quota management.

Managed AWS services (EC2, S3, IAM) and automated deployment and transaction-monitoring processes for payment-industry workflows; liaised with third-party vendors (Worldpay, PayPal).

Designed and led the migration of the Comptel Operations platform from in-house Solaris servers to RHEL-based infrastructure, directing a team of two (one on-site, one offshore) while coordinating with the IN and GSM CDR teams to keep billing and mediation running throughout.

• Managed day-to-day operations and configuration of the Comptel Mediation Application, working with the implementation team to reduce CDR rejections and improve billing/mediation accuracy.
• Troubleshot and reprocessed rejected CDRs; provided on-call incident management for mediation platform outages.
• Supported Revenue Assurance with ad hoc SQL queries against mediation data, including GSM device location lookups.
• Documented operational requirements and functional specifications for platform changes; produced traffic and system analysis reports for stakeholders.
• Developed Shell, Awk and Perl automation for backup, archiving and production optimisation across the mediation billing architecture.

Started in the legacy mediation billing operations team, progressing to lead the Comptel Operations team — taking ownership of platform operations and building team capability through structured training.

• Defined and documented standard operating procedures for the legacy platform; led onboarding and knowledge transfer for new team members.
• Coordinated between NSS and mediation teams to ensure accurate CDR generation, including roaming CDR mediation.
• Provided on-call production support, planned the team's on-call rotation, and implemented ITILv3-based incident, change and release management.
• Reported platform and team status to management; created customised shell scripts to optimise production systems.

Automated offline deployment of the Siebel CRM application and AIX server maintenance; supported migration of applications from production to in-house development environments.

Maintained 100% SLA compliance on the Netforensics maintenance team; customised batch/shell scripts and regular expressions to optimise SIM product performance.

Maintained 99% server uptime through proactive monitoring; managed database backups, user accounts, and hardware/network inventories for international (Japan-based) clients.

Automated remote deployments and streamlined Linux OS installations; configured Solaris zones, IBM MQ, and database servers.