Duties and Responsibilities:• Oversees the upgrade and replacement of Checkpoint firewall clusters, optimising rule bases and improving hardware resource utilisation.• Serves as the cybersecurity champion for the network team, ensuring adherence to security best practices.• Leads the upgrade and replacement of switch stacks across hospitals, ensuring optimal network performance.• Acts as a subject matter expert for firewall technologies, conducting extensive debugging of network traffic.• Implements transparent proxies and decommissions existing proxy servers, managing client configurations for proxy settings removal.• Creates layer 2 and layer 3 topology maps for three large hospitals and multiple medical facilities.Accomplishments:• Redesigned the internet DMZ topology to accommodate increased traffic volumes, enhancing network efficiency.• Executed the migration of firewall hardware, transitioning from virtual to physical infrastructure, ensuring improved performance and reliability.• Successfully orchestrated the migration of firewall topology, consolidating certain firewalls while segregating others, optimising the network architecture for enhanced efficiency.• Designed and implemented a cutting-edge 10Gbps internet topology, catering to approximately 50,000 users. This initiative significantly improved network speed and capacity, fostering seamless connectivity for the user base.• Functioned as the Subject Matter Expert for Checkpoint and various other firewall technologies, providing invaluable insights and guidance to ensure the effective operation of the network security infrastructure.• Served as the Cyber Champion for network systems, leveraging machine learning tools such as Darktrace, Ordr and Tenable to monitor and enhance system security proactively. This approach enabled the organisation to stay ahead of potential cyber threats and vulnerabilities.

Duties and Responsibilities:• Led organisation-wide projects overseeing complex network solutions, including VMware and Netapp datacenter, LAN upgrades, WAN consolidation (MPLS) and IT rollout.• Designed solutions for new hardware and software network access, ensuring PCI and GDPR data isolation.• Provided network solutions to sister companies with ad-hoc escalated support.• Administered LAN/WAN, managing Checkpoint, Juniper Firewalls and service providers.• Designed PCI-compliant networks for retail sites with customised LAN designs.• Conducted workshops to train support staff on systems and guided users on new hardware/software.• Generated in-depth documentation for solutions and provided comprehensive handovers.• Offered 3rd and 4th line support for BAU activities, including Citrix support and assistance with rail systems.• Managed vendor relationships, organising projects and overseeing installations and fault resolution.Accomplishments:• Engineered and constructed an in-house data centre network, establishing a robust infrastructure.• Implemented a Disaster Recovery solution, optimising in-house resources and enhancing business continuity.• Orchestrated the design and deployment of a comprehensive Wide Area Network solution, leveraging existing MPLS circuits and introducing a multivendor circuit, paving the way for future Software-Defined Networking initiatives.• Led a new train line project, resulting in one station winning Station of the Year for its innovative technology.• Developed a seamless WiFi solution for uninterrupted transitions between train stations and trains, earning a European Union award nomination.• Provided valuable consultation on data centre design and migration to sister companies, optimising their IT infrastructure.• Earned recognition with multiple permanent role offers, including a Project Lead position in a sister company, showcasing leadership and technical prowess.

Duties and Responsibilities:• Managed a team of 3 to provide BAU support across the entire estate during an ongoing service migration project, ensuring seamless operations.• Played a key role in a project team relocating all onsite services to a hosted data centre. Implemented robust security measures on firewalls, routers and operating systems. Expanded configurations of ASA firewalls, Cisco Nexus switches, VMware, Appsense and Netscalers.• Project-managed initiatives, including the upgrade and expansion of the WAN, data and service migrations/integrations for newly acquired businesses and LAN upgrades for offices, factories and transport depots.• Maintained 99.999% network availability across WAN and site LANs as part of day-to-day duties.• Oversaw all WLANs across the estate, ranging from ad hoc WAPs and 3G boosters to fully deployed WLC environments.• Ensured network security throughout the business, implementing necessary measures to safeguard systems.• Conducted cross-training of skills and maintained detailed documentation with specialist team members, ensuring operational continuity in their absence.• Took ownership of monitoring software, implementing new tools such as Nimsoft, Plixer Scrutiniser and devices/software to monitor production facility environments.Accomplishments:• Developed an application facilitating remote migration of users between Citrix environments, eliminating the need for national travel by staff to manually migrate users and their storage areas.• Orchestrated and executed a project to digitise livestock farms across the nation, enhancing efficiency and data management.• Successfully integrated networks and server infrastructure from smaller acquired businesses into the existing systems, ensuring seamless operations and data synergy.• Effectively managed a team of contractors to provide coverage for the infrastructure team during high-profile project work, maintaining operational continuity and project success.