Senior System & Information Security Administrator

We are looking for a highly autonomous and hands-on  Senior System & Information Security Administrator  to take full ownership of the company’s global IT infrastructure and security environment. This is a standalone IT role, responsible for all aspects of the organization’s IT operations, infrastructure, security, and end-user support, while coordinating external IT providers and vendors. Key Responsibilities: System Administration  – Manage and maintain servers (On-prem/ Azure), Active Directory (Entra ID), user accounts, and monitoring systems IT Infrastructure & Storage  – Maintain networks, hardware, and storage systems to ensure stable and efficient operations Technical Support  – Provide high-level technical support to end users and resolve infrastructure related issues Information Security  – Maintain firewalls, endpoint protection, and access control; enforce security policies to ensure system integrity Backup & DB Maintenance  – Manage backup processes, disaster recovery (DR), and routine MS-SQL Server maintenance Vendor Coordination  – Professional management of external IT and security vendors when required. Requirements 7+ years of proven experience as a System Administrator – Mandatory. Strong knowledge of Windows Servers, Linux Servers, Networking, and IT infrastructure. Experience with Azure and Microsoft 365 (M365) administration. Experience with virtualization – mainly Proxmox Deep understanding of cyber security English – very high proficiency.