ΙΤ System Administrator

Celestino
is one of the largest Greek women's fashion companies, with more than 40 years of history. With continuous growth and presence in Greece and abroad, we are looking for enthusiastic people with a positive attitude, a smile, and a passion for customer service.

We are waiting for you to join our Headquarters as an
IT
System Administrator
in our IT Department. Υou will play a key role in keeping our IT infrastructure secure, stable, and efficient. From managing daily operations and supporting the first-level team, to applying security best practices and driving system improvements, you'll be at the heart of what keeps everything running. Guided by the IT Manager, you'll also contribute to infrastructure projects and enhancements that power the company's growth.

If you're looking for a role where teamwork meets technology, and where your ideas truly matter - we want you in our team.
Egaleo | Full-time | IT Department

What You'll Be Doing

• Provide Level 2 technical support, resolving escalated issues and mentoring the first-level support team.
• Design, configure, and maintain reliable computer systems, network servers, and virtualization platforms.
• Monitor and ensure availability, performance, and security across all infrastructure components.
• Ensure 24/7 availability of business-critical services, including internal systems and public-facing websites.
• Manage and support IIS, HAProxy, and Cloudflare, ensuring high availability, load balancing, and web application security.
• Administer and optimize environments such as Windows Server, Linux, VMware, and Office 365.
• Implement, monitor, and maintain EDR, firewalls, and endpoint protection tools.
• Maintain and regularly test backup and disaster recovery solutions (e.g., Veeam).
• Develop and operate security controls for systems, applications, and network infrastructure.
• Maintain accurate technical documentation, including system configurations, procedures, and change logs.
• Prepare infrastructure reports, including system health, incidents, and change tracking

What You'll Bring To The Team

• Minimum 3 years of experience in system and infrastructure administration in a hybrid IT environment (on-premise and cloud)
• Strong hands-on experience in system administration across physical, virtual, and cloud environments
• Proficient with:
• Windows Server and Active Directory
• VMware ESXi and vCenter administration
• Linux system administration
• Office 365 (Exchange Online, SharePoint, Teams)
• Veeam or equivalent backup solutions
• Hands-on experience with firewall configuration, management, and troubleshooting in multi-site environments
• Solid understanding and practical experience in:
• Endpoint Detection and Response (EDR) solutions
• Access control and system hardening
• Strong networking knowledge, including:
• DNS, DHCP, TCP/IP
• Routing, switching, and connectivity troubleshooting
• Proven web server management experience, including administration and configuration of IIS, HAProxy, and Cloudflare (DNS, CDN, WAF) to ensure high availability, load balancing, and web application security
• Experience with SQL Server for basic maintenance and troubleshooting
• Familiarity with infrastructure monitoring tools (e.g., Zabbix, Nagios) and log management practices
• Ability to implement and maintain firewall and EDR security policies
• Ability to follow structured incident management and change control procedures
• Strong analytical thinking, problem-solving ability, and collaboration skills

What Will Make You Stand Out

• Familiarity with SoftOne ERP and Matis Lvision WMS
• Understanding of VoIP and Asterisk call center infrastructure
• Experience supporting distributed IT environments (HQ and retail stores)
• Exposure to cloud platforms such as Azure and/or AWS
• Scripting experience (PowerShell, Bash, Python)
• Relevant certifications (Microsoft, VMware, Security+, ITIL).

What We Offer To You

• Group health insurance designed to care for your health
• Meal Card to cover your everyday needs at Super Markets and restaurants
• Employee discount on Celestino's online products
• Business Mobile Phone to support your role
• On-site company restaurant offering meals at affordable prices
• Organized and pleasant working environment
• Colleagues who listen and support you every step of the way
• Commitment to principles of equality and respect for all
• Training & career development opportunities within the organization

Take the next step in your IT career and help us build a stronger, smarter infrastructure.
CELESTINO | Bring your smile. We'll bring the style