Major infrastructure, cybersecurity, business-continuity and financial-market connectivity initiatives I have led or implemented.
Led migration from legacy on-premises physical infrastructure to VMware ESXi-hosted Windows Server 2025 virtual environments in the ATHEX/Euronext colocation environment.
Modernized Windows domain services and business-critical application/database workloads while supporting resilient production and disaster-recovery operations.
Migrated legacy Windows Server 2003 domain services to resilient Windows Server 2025 virtual Domain Controllers.
Migration included Active Directory, DNS and DHCP, with staged modernization from legacy physical servers into the current virtualized colocation architecture.
Designed a centralized Wazuh SIEM environment integrating Windows servers/endpoints, WatchGuard telemetry and ESET PROTECT events.
Built local AI-assisted incident analysis, severity classification, SOC dashboards, USB device monitoring, and email/desktop/mobile alerts. Critical and High events generate notifications while Medium and Low events remain available for review; local AI explains incidents and proposes investigation/remediation guidance.
Currently leading technical preparation for direct Euronext connectivity for order entry and real-time market data.
Coordinating provider connectivity toward Euronext infrastructure in Bergamo and implementing WatchGuard routing/firewall requirements for unicast order-routing traffic and multicast market-data feeds, including testing and troubleshooting.
Implemented and supported institutional FIX connectivity for order routing to the Greek equities market.
Supported connectivity through Eurocorp trading infrastructure and coordinated technical troubleshooting for mission-critical institutional order flow.
Designed and configured the Eurocorp-side WatchGuard site-to-site VPN with ASSYA Compagnie Financière.
Implemented firewall policies and routing to support secure inter-company services and connectivity to ASSYA's AVAYA IP telephony environment.
Implemented geographically separate Disaster Recovery capability supporting business continuity and operational resilience.
The architecture supports critical financial-services workloads and DORA-related ICT resilience objectives within the broader organizational compliance framework.
Administer Synology NAS infrastructure for centralized storage, Docker containers, virtual machines and enterprise backup.
Includes Active Backup for Business, Active Backup for Microsoft 365 and Veeam-based backup/recovery processes for endpoints, servers, file services and cloud workloads.
Selected, installed and administer the company's FreePBX IP telephony environment as a cost-efficient unified communications platform.
Supports selective call recording for client-order related extensions, Zoiper mobile softphones, routing and operational administration while avoiding unnecessary proprietary licensing overhead.
Secure SSL VPN and remote-access infrastructure was already deployed before lockdown restrictions.
This allowed rapid transition to remote operations, giving employees controlled access to corporate workstations while maintaining continuity of critical business services.
Designed and implemented a point-to-point laser/FSO network link between two company buildings.
Extended the corporate LAN across separate sites using rooftop line-of-sight optical equipment.
Administered company server workloads hosted with Fermorite.
Managed connectivity, server operations, access, monitoring and coordination with the hosting provider.