senior systems administrator.

Joining the group as Senior Systems Administrator offers the following benefits:

• Attractive remuneration package.
• Private health insurance coverage starting from your very first day.
• Continuous training opportunities and professional certification support.
• Participation in mission-critical, large-scale technology projects.
• Outstanding job stability within an established concession environment, supported by a close-knit team culture with exceptionally low turnover.
• Further career opportunities within the group.

As a  Senior Systems Administrator, you will be responsible for the following core activities:

• Administering, monitoring, and troubleshooting physical and virtual server environments (80% Windows, 20% Linux) to maintain peak operational health.
• Managing VMware (vSphere/ESXi) virtualization platforms, Storage/SAN architectures, and robust DR/BCP backup and restore workflows.
• Maintaining and administering enterprise MS Exchange and MS SQL Server environments.
• Overseeing core infrastructure services including Active Directory, GPOs, DNS, DHCP, and utilizing PowerShell for IaC automation.
• Participating in IT projects—such as M365/Azure migrations (Exchange Online, SharePoint) and infrastructure refreshes.
• Utilizing ITSM tools for logging incidents and conducting thorough risk assessments to evaluate downstream impacts before applying system changes.
• Interfacing with cross-functional business departments, specialized network/security teams, and third-party vendors to resolve complex issues.

To qualify for the Senior Systems Administrator position, you should possess:

• 5+ years of hands-on experience in Systems Administration and Infrastructure management within enterprise environments.
• Strong technical expertise across Windows Server, Active Directory, GPOs, VMware vSphere (or other virtualization solutions), SAN/Storage systems, and DR/BCP procedures.
• Practical experience with PowerShell automation scripting alongside M365 and Azure cloud environments.
• Excellent command of the English language.
• Bachelor's Degree (Level 5+) in Computer Science or a related field.
• Industry certifications such as VMware VCP (or equivalent virtualization certification), M365 Administrator, or Microsoft Server Administrator are highly desirable.

• Critical thinking
• Operational task prioritization
• Problem-solving abilities
• Communication

Previous hands-on experience with Windows Server, Active Directory, GPOs, VMware vSphere, SAN/Sto

If you have any questions regarding this Senior Systems Administrator position, you can contact Constantinos at 695 549 9060, from Monday to Friday between 10:00 and 16:00. Otherwise, feel free to contact me at ccapsiotis@randstad.gr.

We look forward to receiving your application, uploading your updated English CV by clicking the 'apply now' option.

Please note that for transparency and equity reasons, only those applications made online via our site will be assessed. After the screening of all the CVs received, we will only contact the candidates who meet the requirements of the job to arrange an interview. ​All applications are considered strictly confidential.