IT Infrastructure & Security Administrator

Seargin Ltd; Województwo pomorskie; Hybrid; PLN 120,000 - 180,000; Full time

Benefits offered by this job

International Environment

Modern Office

Job summary

Seargin Ltd. is seeking an IT Administrator to maintain and advance our critical infrastructure in Poland. You will handle networks, servers, identity management, and security to ensure high availability and performance across business systems.

The role includes scripting automation, incident response, and documentation of architecture and processes, with collaboration across teams in a dynamic, international environment.

Qualifications

• 3+ years in IT infrastructure administration or similar roles.
• Strong knowledge of Windows Server and Linux operations.
• Experience with Active Directory, GPOs, and identity management.
• Familiarity with virtualization, cloud platforms, and security controls.

Responsibilities

• Administer, maintain, and develop IT infrastructure for stability and performance.
• Manage LAN/WAN/WLAN/VPN, optimize network performance, and troubleshoot issues.
• Administer Windows Server and Linux environments, including virtualization.
• Manage Microsoft 365, Entra ID, Exchange Online, Teams, SharePoint, AD, and GPOs.
• Monitor infrastructure, analyze logs, diagnose issues, and resolve incidents.
• Implement security controls, MFA, EDR, firewalls, and vulnerability remediation.
• Handle backups, DR planning, and business continuity activities.
• Automate tasks with PowerShell/Bash/Ansible, and improve processes.
• Document architecture, migrations, and operational procedures.

Skills

Systems Administration

Networking Expertise

Network Protocols

Windows Admin

Active Directory

Cybersecurity

Automation Scripting

Monitoring & Troubleshooting

Documentation

Bilingual English/Polish

Tools

VMware

Hyper-V

Azure

AWS

Google Cloud

Intune

Job description

Seargin Ltd. is seeking an IT Administrator to maintain and advance our critical infrastructure in Poland. You will handle networks, servers, identity management, and security to ensure high availability and performance across business systems.

The role includes scripting automation, incident response, and documentation of architecture and processes, with collaboration across teams in a dynamic, international environment.