John Georgiou

Linux System Administrator at IpHost.net

Athens, Attiki, Greece

About

• Oracle Cloud Infrastructure (OCI) administration • Computer building, setup and troubleshooting • Network & internet connection setup and optimization. • Setup and optimization of Mikrotik Routers (RouterOS) • Security mechanisms administration (cpHulk, Firewalls, Fail2ban etc.) and log analysis. • Dedicated Servers setup (bare metal or hypervisors) • VM setup / OS & services installation & configuration • Docker containers setup & administration • cPanel/WHM administration • Web hosting systems migration (cPanel, Plesk etc.) • Zabbix monitoring system configuration & custom templates • Troubleshooting of e-mail delivery (incoming/outgoing) problems and spam e-mail incidents. • Troubleshooting of DNS problems (resolving, forwarding, DNS records etc.) • Hosting administration (migrations, resources modification, renaming etc.) • Troubleshooting of easily identifiable website related issues (hacked pages/files, wrong permissions, filename changes etc.) • Installation and optimization of PHP/Apache modules using WHM • SSL certificate registration/renewal • Creating technical documentation and providing guides for cPanel and customer’s account page procedures regarding DNS zones/subdomains/alias/addons and various settings.

Experience

  • IpHost.NET ()
    • Senior Linux System Administrator
      Jan 2025 - Present · 1 yr 7 mos

      • Infrastructure setup and management for servers, virtualization, and hosting environments, ensuring scalable, secure, and reliable operations. • Deliver 2nd Level Technical Support to customers, resolving complex technical issues and providing expert assistance across a wide range of hosting and system topics. • Coordinate support tickets and technical issues across 1st, 2nd Level, and DevOps teams to facilitate efficient problem resolution and foster cross-team collaboration. • Analyze potential automation opportunities to streamline technical support processes, driving increased efficiency and improved service quality. • Configure Zabbix monitoring systems with custom templates for proactive infrastructure monitoring. • Configure and maintain dedicated servers (bare metal and hypervisors) and virtual machines, including OS and service deployments. • Setup and administer Docker containers, cPanel/WHM, Plesk, Virtualmin, and conduct web hosting system migrations. • Develop internal technical documentation and guides to support team workflows, processes, and knowledge sharing.

    • Linux System Administrator
      May 2021 - Jan 2025 · 3 yrs 9 mos

      • Security mechanisms administration (cpHulk, Firewalls, Fail2ban etc.) and log analysis. • Dedicated Servers setup (bare metal or hypervisors) • VM setup / OS & services installation & configuration • Docker containers setup & administration • cPanel/WHM administration • Web hosting systems migration (cPanel, Plesk etc.) • Zabbix monitoring system configuration & custom templates • Troubleshooting of e-mail delivery (incoming/outgoing) problems and spam e-mail incidents. • Troubleshooting of DNS problems (resolving, forwarding, DNS records etc.) • Hosting administration (migrations, resources modification, renaming etc.) • Troubleshooting of easily identifiable website related issues (hacked pages/files, wrong permissions, filename changes etc.) • Installation and optimization of PHP/Apache modules using WHM • SSL certificate registration/renewal • Creating technical documentation and providing guides for cPanel and customer’s account page procedures regarding DNS zones/subdomains/alias/addons and various settings.

  • CQS S.A. (2 yrs 3 mos)
    • 1st Level SOHO Technical Support Acting Team Leader
      Feb 2020 - Oct 2020 · 9 mos

      • Lead & mentor a technical team of 15-20 Technical Oriented agents • Discover training needs, provide coaching & calls auditing • Member of the team leaders’ group, responsible for technical support agents • Contact point for all team members & involved internal teams • In-depth monitoring of performance metrics • Act proactively to ensure smooth team operations and effective collaboration • Delegate tasks and set deadlines • Crisis Management

    • 2nd Level SOHO Technical Support
      Mar 2019 - Feb 2020 · 1 yr

      Providing 2nd Level technical support to business customers of WIND S.A. Troubleshooting telephone (PSTN, ISDN, VoIP) and Internet (ADSL, FTTC, FTTH) connection issues, consulting on security and optimization matters. Handling VIP and High Value Customers' cases.

    • SOHO Technical Support Agent
      Sep 2018 - Mar 2019 · 7 mos

      Providing technical support to business customers of WIND S.A. Troubleshooting telephone and Internet connection problems, consulting on security and optimization matters.

  • Forthnet ()
    • 2nd Level Tech Support
      Nov 2016 - Jul 2018 · 1 yr 9 mos

      Voice, Broadband & PayTV Services technical support. Troubleshooting, optimizing, consulting. VIP and High Value Customers

    • Voice, Broadband & PayTV Services Tech Support
      Dec 2012 - Nov 2016 · 4 yrs

      Voice, Broadband & PayTV Services technical support. Troubleshooting, optimizing, consulting. VIP and High Value Customers

  • IT Dept at Planatech S.A
    Apr 2008 - Oct 2011 · 3 yrs 7 mos

    Systems & Website Administrator. Monitoring and Maintenance of the company's IT infrastructure (Windows Server 2003 R2, Active Directory, Exchange, Payroll application, file and SAP servers). Design and Development of primary website elements using Adobe Flash.

  • M2 Browning machine gunner at EL.DY.K at Hellenic Army
    Jun 2010 - Dec 2010 · 7 mos

    Mandatory military service. Private of the Hellenic Force in Cyprus.