Senior IT Administrator

Technologies we use

Expected

• Active Directory

Operating system

• Windows

About the project

We are looking for an Internal IT Administrator to join our IT team and take responsibility for the administration, maintenance, security, and continuous improvement of our internal IT infrastructure.

You will work closely with the internal IT team (IT Administrators, IT Support Specialists, and a Security Engineer), helping ensure that our infrastructure and IT services remain stable, secure, and reliable for employees across the organization. This is a hands-on role with a strong focus on Active Directory, SCCM, backup infrastructure, RDS, and Microsoft Defender for Endpoint.

Your responsibilities

• Administer and maintain Windows Server infrastructure, including ADDS, DNS, DHCP, GPO, File Server/DFS, and related services.
• Manage and maintain Active Directory, including users, groups, permissions, policies, and identity-related services.
• Administer SCCM with a focus on software deployment, OS imaging, and patch management.
• Manage and monitor backup solutions, including Veeam and Synology NAS, and ensure data can be successfully recovered.
• Administer and maintain Remote Desktop Services (RDS).
• Manage Microsoft Defender for Endpoint, including device onboarding and security policy configuration.
• Administer Microsoft Intune, Autopilot, Windows Autopatch, and other endpoint management solutions.
• Administer Microsoft 365 and Entra ID, including Exchange Online, Teams, SharePoint Online, and OneDrive.
• Maintain and troubleshoot Hyper-V, physical servers, storage, and server hardware.
• Support VPN, DirectAccess/Always On VPN, NPS, 802.1X, and other core network services.
• Diagnose infrastructure incidents, identify root causes, and implement effective solutions.
• Monitor infrastructure performance, availability, and security and proactively address potential issues.
• Maintain web hosting, domains, and public DNS.
• Use PowerShell to automate repetitive administrative tasks and improve operational efficiency.
• Maintain technical documentation and contribute to IT infrastructure projects and continuous improvement initiatives.
• Collaborate with the Security Engineer on infrastructure security, vulnerabilities, and security incidents.
• Support the maintenance and operation of the company's server room and related infrastructure.

Our requirements

• 4+ years of professional experience in IT infrastructure administration.
• Strong hands-on experience with Active Directory / ADDS.
• Practical experience with SCCM, particularly software deployment, imaging, and patch management.
• Experience with backup solutions, preferably Veeam and/or Synology.
• Experience administering RDS.
• Experience with Microsoft Defender for Endpoint.
• Good knowledge of Windows Server and Microsoft 365 administration.
• Experience with Intune and endpoint management.
• Good understanding of networking concepts such as DNS, DHCP, VPN, NPS, and 802.1X. Experience with virtualization, preferably Hyper-V.
• Working knowledge of PowerShell.
• Experience with ADFS and ADCS/PKI.
• Knowledge of Linux administration.
• Experience with Windows Autopilot, Windows Autopatch, or Windows 365.
• Experience with enterprise storage and physical server infrastructure.
• Knowledge of web hosting and public DNS.
• Experience with ITSM tools such as GLPI.
• Experience with PowerShell automation.
• Strong troubleshooting and problem-solving skills.
• Ability to work independently while being a collaborative team player.
• Good communication skills and a proactive approach to identifying and solving problems.
• Polish language at C1+ level, English at B2+ level.
• Openess to work in a hybrid model from our Warsaw office.

Benefits

• sharing the costs of sports activities
• private medical care
• sharing the costs of foreign language classes
• sharing the costs of professional training & courses
• life insurance
• remote work opportunities
• flexible working time
• fruits
• corporate products and services at discounted prices
• integration events

Technologies you will work with:

• Core infrastructure: ADDS, ADFS, ADCS/PKI, Windows Server, File Server/DFS, DNS, DHCP, GPO, Hyper-V, RDS, Linux
• Endpoint & device management: SCCM, Intune, WSUS, Windows Autopatch, Autopilot, Windows 365
• Microsoft 365: Entra ID, Exchange Online, Teams, SharePoint Online, OneDrive
• Security: Microsoft Defender for Endpoint, NPS, 802.1X, VPN, password management
• Backup & hardware: Veeam, Synology NAS, physical servers, storage, iDRAC/iLO/iRMC
• Tools & automation: PowerShell, GLPI

APN Promise S.A.

At Promise Group, we don’t just deliver technology. We accelerate business. As a trusted Microsoft Partner, we help organizations unlock the full potential of Microsoft technologies through cloud, AI, security, modern workplace, data, and infrastructure solutions. Through our work with both business customers and partner networks, we deliver innovative solutions that drive digital transformation across CEE, the Baltics, SEE, and CCA markets.

We work in an international environment where collaboration and a proactive approach matter. We believe in taking responsibility, building relationships based on trust and respect, and always looking for better ways to learn, grow, and improve. We value people who take ownership of their work, share knowledge, and enjoy working toward common goals.

This is how we work