someone

• Managed network security and infrastructure for 100+ UK locations (56 bingo clubs, 52 casinos, 4 offices, 2 datacentres) supporting 5,000+ endpoints — maintained 99.8% availability with full security compliance across the estate • Led enterprise firewall upgrade programme across 200+ Check Point firewalls and Cisco Meraki infrastructure — coordinated zero-downtime deployments across all UK locations, single-handedly managing full team workload during critical periods • Conducted vulnerability assessments, configuration reviews, and security audits — identified and remediated 200+ security issues, improving compliance score by 45% using CIS Benchmarks and NIST frameworks • Hardened 500+ firewall policies and security rules — reduced attack surface by 30% using policy-based governance whilst maintaining full business application availability • Performed Active Directory security reviews — identified misconfigurations, privilege escalation paths, and exposure risks, implementing remediations aligned with MITRE ATT&CK framework • Developed Bash and Ansible automation scripts — reduced manual configuration errors by 75% and enforced consistent security baselines and CIS hardening standards across all sites • Supported tier-2 incident response and triage — investigated security events, coordinated containment and remediation across cross-functional teams, maintaining incident SLAs and documentation • Mentored and trained 10-member NOC team on security troubleshooting, incident response, and automation — reducing mean time to resolution by 40%

• Administered large-scale Linux infrastructure (RHEL, CentOS, Debian, Alpine, Ubuntu) for 500+ users across 15 international locations — maintained 99.95% availability through proactive security monitoring and hardening • Developed 50+ Python and Bash automation scripts for configuration management, deployment pipelines, and security compliance checks — reduced manual effort by 70% and improved consistency across all environments • Implemented Ansible configuration management and CIS security hardening across 300+ Linux servers — enforced consistent security baselines, patch compliance, and audit readiness • Configured Nginx reverse proxies and load balancers with SSL/TLS termination, security headers, WAF rules, and caching for high-traffic production environments • Managed PostgreSQL and MySQL relational databases — configured replication, automated backups, point-in-time recovery, and performance monitoring for mission-critical applications • Built monitoring and alerting infrastructure — enabled proactive threat detection and capacity planning, reducing customer-impacting incidents by 95% • Supported API deployment, integration troubleshooting, and backend services in Ruby on Rails, PHP and Node.js

Managed hybrid infrastructure including Windows Server, Linux and VMware virtualisation for enterprise clients in regulated industries — implemented security controls, compliance frameworks and incident management processes • Automated patch management and security upgrades across 150+ servers — maintained security compliance, minimised vulnerability exposure windows, and documented all changes in knowledge base systems • Configured monitoring dashboards and alerting for infrastructure health, application performance and security events — achieved 2-hour average incident resolution time • Provided tier-2 technical support for incidents — logged, investigated and tracked issues from triage through to resolution, adhering to incident management KPIs and SLAs • Mentored 5 junior administrators on Linux security, scripting best practices and incident response methodologies