Konstantinos Michail Psarras
IT Systems & Network Administrator
Athens
Summary
Dynamic IT Systems Administrator with expertise in Windows Server and Active Directory, honed at the National Bank of Greece. Proven track record in optimizing infrastructure and enhancing security through GPO implementation and PowerShell scripting. Strong problem-solving skills complemented by effective collaboration with cross-functional teams to drive IT audits and system upgrades.
Overview
5
5
years of professional experience
1
1
Language
Work History
IT Systems Administrator | Windows Infrastructure
National Bank of Greece
08.2022 - Current
- Administered and maintained enterprise infrastructure based on Windows Server and Active Directory.
- Provided support to users, ensuring uptime and quick resolution of incidents
- Managed Office 365 environment including Exchange Online, user licensing, and security configurations.
- Configured and monitored virtual machines (Hyper-V / VMware) for internal services and testing.
- Handled basic network and firewall settings, including DNS, DHCP, VPN access, and port management.
- Implemented Group Policy Objects (GPOs) to enforce security and compliance policies.
- Participated in system upgrades, migrations, and onboarding of new hardware/software.
- Used PowerShell for scripting common administrative tasks and bulk operations.
- Ensured endpoint security through antivirus monitoring and patch management solutions.
- Collaborated with cross-functional teams on infrastructure optimization and IT audits.
IT Support Technician
Ministry of Health
01.2021 - 08.2022
- Provided daily technical support to end users (hardware, software, network issues).
- Installed and configured PCs, printers, and basic networking equipment.
- Assisted in Windows OS installations, updates, and troubleshooting.
- Maintained inventory of IT equipment and documented incidents.
- Supported email and Office applications (Outlook, Word, Excel).
- Escalated complex issues to central IT when needed.
Education
Department of Computer Science And Biomedical Info
University of Thessaly
Lamia, Greece11-2020
Skills
- Windows Server & Active Directory Management
- Virtualization (Hyper-V, VMware)
- Network Support (DNS, DHCP, TCP/IP)'
- Programming Languages: C, Java, SQL (taught during university)
- Certification: Cisco CCNA – Routing & Switching
Timeline
IT Systems Administrator | Windows Infrastructure
National Bank of Greece
08.2022 - Current
IT Support Technician
Ministry of Health
01.2021 - 08.2022
Department of Computer Science And Biomedical Info
University of Thessaly
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