Job description

As a Senior IT System Engineer - Infrastructure Specialist, you will be responsible for designing, implementing and maintaining our Microsoft on-premise and Azure infrastructure environments. You will ensure the security, availability, and efficiency of corporate backbone infrastructure including Active Directory, PKI, DNS, DHCP and files servers, as well as our fleet of Windows Servers through modern and automated tooling such as Azure Arc and Puppet.

This role demands an expert proficient in managing enterprise-scale hybrid infrastructure and capable of providing strategic technical guidance. You will ensure the security, availability, and efficiency of corporate systems, while driving innovation and mentoring junior engineers. A strong grasp of Zero Trust Security principles and modern infrastructure best practices is essential.

Responsibilities

• Windows Server Administration: Deploy and maintain on-premise and azure-based Windows Server. Proficiency in managing Linux based servers, such as CentOS, is a plus.
• Cloud Services: Operate and manage Azure-based infrastructure, including Azure Arc for hybrid management.
• Corporate Services: Maintain key infrastructure services such as DNS, DHCP, Radius, and File Servers.
• Security Hardening Policies: Define, deploy, and maintain security hardening policies for Windows and Linux servers, following industry's best practices.
• PKI Management: Operate and enhance the company's Public Key Infrastructure (PKI), supporting use cases like certificate-based authentication and secure network access.
• Secure Admin Workflows: Implement and maintain secure administrative access using Privileged Access Workstations (PAWs), secure protocols (SSH, RDP), and Privileged Access Management (PAM) tools.
• Active Directory: Maintain and support both cloud and on-premise Active Directory, including integration with Microsoft Entra ID.
• Automation & Configuration Management: Use Puppet and scripting tools (PowerShell, Python, Bash) to automate and maintain system configurations.

What We're Looking For

Education

• Master's degree in Computer Science, Information Technology, or a related field.

Experience

• Extensive experience managing Microsoft infrastructure, especially Windows Server, Microsoft Entra, and Azure.

• Experience in migrating legacy on-premise systems to the cloud (e.g., Azure ARC, cloud identities) is a strong plus.

Certifications (Preferred)

• Microsoft certifications such as SC-100, AZ-104, AZ-140, AZ-900, MS-102, MS-900.

• Additional certifications in security or cloud architecture are a bonus.

Technical Skills

• Strong scripting skills: Python, Bash, PowerShell.

• Experience with KQL and Microsoft Graph API is a plus.

• Hands-on experience with:

  • Active Directory

  • File Servers

  • Radius

  • PKI (Public Key Infrastructure)

  • NPS and NDES

• Solid knowledge of Windows server provisioning, vulnerability management, and incident handling.

Cultural and Language Fit

• Strong understanding of European work culture.

• Excellent written and spoken English.

Leadership and Project Management

• Proven ability to lead infrastructure changes across large-scale environments.

• Strong stakeholder communication and team collaboration skills.

Interpersonal Skills

• Clear communicator with the ability to collaborate with both technical and non-technical stakeholders across the business.