Laszlo Szabo
Gillingham
Summary
Accomplished IT professional with advanced expertise in cloud platforms, including AWS, Oracle Cloud Infrastructure, and Azure. Proficient in hybrid multi-cloud design, VPC/ACL management, and load-balancer configuration. Skilled in Linux and systems administration across various distributions, networking and security with Cisco and Fortigate NGFW, and automation using Terraform and Ansible. Experienced in virtualization technologies such as VMware and Docker/Kubernetes, database management with MySQL/RDS and MongoDB, and monitoring tools like Grafana and Nagios. Adept at designing hybrid data centres with Cisco-based infrastructure from conception to delivery. Committed to leveraging extensive technical skills to drive innovation and optimise performance within enterprise environments.
Overview
14
14
years of professional experience
6035
6035
years of post-secondary education
Work history
Application Support Linux Engineer
Trinity College London
London
10.2022 - 12.2025
- AWS Cloud Management: AL2, AL2023 and Ubuntu based Linux server management for Trinity on. Platform migration from AL2 to AL2023. Terraform based server management, ACL, VPC, S3 bucket, elastic IP management. IPSEC based site to site VPN implementation to connect up hybrid cloud with Oracle OCI Cloud via pfSense. Implementing IPSEC connections to connect up multiple sites to multiple different clouds. Implementing WAF filters for Application and Network load-balancers for application servers. GIT cluster implementation for CI/CD pipeline management for Linux servers. BIND DNS cluster implementation and maintenance with AWS – OCI cross connected name server cluster. VPC peering setup in AWS VPC and user based Active Directory VPN implementation via pfSense for remote access for users and groups. Auto scaling servers with auto startup and shutdown implementation via AWS Lambda. Implementing AWS client for cross connect based backup. Implementing S3 bucket auto backup to create offsite backup via AWS cli.
- Oracle OCI Cloud management: Load-balancer and WAF application filter setup and maintenance for OCI based servers. IPSET setup for independent DNS servers with iptables firewall. Oracle Linux server management and migration from Oracle Linux to Oracle Linux 9.6 system. OracleDB maintenance and backup management. Storage management and snapshot management. Implementing OCI Linux client for cross based cross connect backup. BIND DNS cluster setup and implementation multi hybrid cloud based ha setup.
- Windows AD user Server: Implementing Windows server 2022 for user based pfSense authentication. Implementing FreeRadius based pfSense MFA with user authenticated VPN server.
- Firewall and VPN: Implementing user based VPN server with key and user authentication and MFA authentication on pfSense in AWS EC2. Implementing multi location based pfSense IPSEC VPN to Azure, Oracle and AWS cloud.
System and Network Support Engineer
Vision247 Ltd
09.2021 - 10.2022
- Managed and architected complete infrastructure for Vision247's multi-site, carrier- grade broadcast platform spanning three Tier-3 data centres (Telehouse North, Telehouse East, and Chiswick). Delivered enterprise-grade network and systems solutions supporting live IP-based television streaming with 99.99% uptime requirements.
- Network Architecture & Infrastructure: Maintained Cisco-based multi-homed BGP network with redundant ISP connectivity, implementing VRF segmentation and MPLS Layer-3 VPN for traffic isolation. Configured and optimized ISIS and BGP routing protocols for high-availability multicast network architecture supporting IP television distribution. Implemented Cisco Nexus VPC (Virtual Port Channel) for VMware vCenter fabric redundancy, eliminating single points of failure. Established dark fibre cross-connects via COLT carrier services between Telehouse facilities, delivering dedicated 10Gbps low-latency interconnectivity.
- Virtualization & Platform Migration: Led complete virtualization platform transformation, migrating 50+ production workloads from Citrix XEN to VMware vSphere 7 with vSAN hyper-converged infrastructure. Implemented vCenter High Availability cluster with DRS and vMotion for zero-downtime maintenance windows.
- Database & Application Delivery: Architected and deployed Galera MySQL multi-master cluster with HAProxy load balancing, providing database high availability and automatic failover for critical streaming metadata services.
- Systems Administration: Maintained hybrid Linux (CentOS, Ubuntu) Server estate supporting broadcast control systems, transcoding workflows, and media asset management platforms. Implemented comprehensive monitoring with Nagios and performance dashboards for proactive incident management.
System and Network Support Engineer
Atlas Interactive Management
08.2013 - 08.2021
- Led infrastructure architecture and operations for Atlas-Telecom's hybrid cloud platform, managing multi-cloud environments across private VMware, AWS, and Google Cloud Platform. Designed carrier-grade networking solutions with multi-homed BGP connectivity supporting high-availability telecommunications services.
- Network & Infrastructure: Designed multi-homed BGP network on Cisco platform with dual ISP connectivity and automatic failover Implemented Cisco deployment at GTT Data-Centre with ASA firewalls, OSPF and BGP routing Architected redundant pfSense-based IPsec VPN tunnels for encrypted inter-datacenter communication Led complete data-centre network design and migration including Layer-2/3 architecture and firewall policies
- Cloud & Virtualization: Migrated 60+ physical HP/Dell servers to VMware vCenter private cloud with DRS, HA, and vMotion Deployed Veeam Backup & Replication with automated policies and off-site replication Established hybrid connectivity between on-premises vCenter and AWS via IPsec VPN with BGP
- Database & Distributed Systems: Architected MongoDB 8-node sharded cluster with replica sets for horizontal scalability Implemented multi-node Redis cluster for high-performance caching with sub-millisecond latency Deployed MySQL Group Replication cluster on AWS EC2 for financial transaction processing
- Kubernetes & Automation: Implemented production Kubernetes cluster on GKE with Apache Kafka for real-time event streaming Deployed Ansible automation managing 100+ servers, reducing manual intervention by 70% Led Exchange Server 2010 to Google Workspace migration for 200+ mailboxes
- Achieved 99.95% uptime through HA design and reduced infrastructure costs by 40% via private cloud migration.
Data-Centre Engineer
Coreix Ltd.
London, Enfield
11.2011 - 08.2013
- Linux Systems Engineer managing large-scale hosting infrastructure supporting 1100+ dedicated and virtual servers at Coreix's Tier-3 data-centre facility. Delivered 24/7 technical support and infrastructure management for enterprise customers across diverse Linux distributions and virtualization platforms.
- Infrastructure Management: Managed fleet of 1100+ production servers across CentOS, Debian, Ubuntu, Red Hat Enterprise Linux, and FreeBSD platforms Provisioned and configured dedicated bare-metal servers and virtual machines for customer deployment Performed system hardening, security patching, and performance optimization across mixed Linux environments Maintained Windows Server infrastructure (2008/2012) for customers requiring hybrid platform solutions
- Virtualization & Network Services: Administered VMware ESX/ESXi and Citrix XEN hypervisor platforms for multi-tenant virtual hosting environments Deployed and managed pfSense firewall appliances for customer network segmentation and VPN access Configured web hosting stacks (Apache, NGINX, PHP, MySQL) and mail servers (Postfix, Dovecot) Implemented backup solutions and disaster recovery procedures for customer data protection
- Monitoring & Performance: Maintained comprehensive monitoring infrastructure using IPmonitor, Cacti, and Zabbix platforms Created custom monitoring checks and performance graphs for capacity planning Responded to alerts and incidents with rapid troubleshooting and root cause analysis
- Generated performance reports and provided proactive recommendations to customers
Education
Level 5 Diploma - Information Technology
LSBR
City of LondonHigh School Diploma - Discovering Mathematics(MU123), My Digital Life(TU100)
OpenUniversity
Milton Keynes06.2014
CCNA - Network and System Support
CISCO
Lewisham College 01.2010 - 01.2011
Advanced Diploma - ICT Professionals Level II/III (C&G)
Lewisham College
London 01.2010 - 01.2011
Micro Electronics
Electro Mechanics Technical College
Ferenc Bajaki College, 1211 BudapestSkills
- Cloud Platforms: AWS (Advanced)
- Oracle Cloud Infrastructure (Advanced)
- Azure (Intermediate)
- Google Cloud (Foundational) – Hybrid multi-cloud design, VPC/ACL management, WAF and load-balancer configuration, S3 and OCI storage, Route 53 & BIND integration, pfSense and IPsec VPN connectivity Linux & Systems Administration Red Hat / Oracle Linux / Amazon Linux (AL2, AL2023) / CentOS / Debian / Ubuntu – Server configuration, automation, patching, hardening, and performance optimization
- Networking & Security: Cisco (Nexus, Catalyst, ASA)
- Fortigate NGFW
- PfSense
- OpenVPN / IPsec VPN – VLAN, OSPF, BGP, VPC design; hybrid WAN, SD-WAN, and site-to-site VPNs; firewall, IPS/IDS, and access-policy configuration for multi-cloud and data-centre networks – MFA integration using Cisco Duo and YubiKey, VPN authentication, and zero-trust access control
- Automation & Infrastructure as Code: Terraform
- Ansible
- Bash / Python scripting – Server provisioning, configuration management, and CI/CD integration for Linux and Windows
- Virtualization & Containers: VMware (vSphere, vCenter, vSAN)
- Proxmox
- Citrix XEN
- Docker / Kubernetes – Multi-cluster management, vMotion migration, containerized application deployment, and Terraform-based infrastructure builds
- Databases, Messaging & Storage: MySQL / RDS
- Galera Cluster
- MongoDB
- Redis cluster
- Apache Kafka – HA-Proxy and Keepalived-based clustering, replication, and performance tuning
- Monitoring & Observability: Grafana
- InfluxDB
- Nagios
- Prometheus
- Cacti
- RRD
- Syslog-NG / SIEM integration – Systems monitoring, alerting, and performance dashboards for Linux and network devices
- Microsoft & Enterprise Systems: Windows Server (2000–2024)
- Active Directory / Group Policy
- Exchange / Office 365
- SQL Server – AD migrations, policy management, and hybrid Azure AD integrations
- Data Centre & Infrastructure: Cisco-based hybrid data-centre design, fibre channel and iSCSI based storage (HP, EMC, IBM), Layer-2/3 VPN architecture, and full-cycle implementation from design to delivery
Timeline
Application Support Linux Engineer
Trinity College London
10.2022 - 12.2025
System and Network Support Engineer
Vision247 Ltd
09.2021 - 10.2022
System and Network Support Engineer
Atlas Interactive Management
08.2013 - 08.2021
Data-Centre Engineer
Coreix Ltd.
11.2011 - 08.2013
CCNA - Network and System Support
CISCO
01.2010 - 01.2011
Advanced Diploma - ICT Professionals Level II/III (C&G)
Lewisham College
01.2010 - 01.2011
Level 5 Diploma - Information Technology
LSBR
High School Diploma - Discovering Mathematics(MU123), My Digital Life(TU100)
OpenUniversity
Micro Electronics
Electro Mechanics Technical College