Senior IT Support & Infrastructure Administrator

Commodity Supplies AG; Województwo mazowieckie; On-site; PLN 150,000 - 230,000; Full time

Benefits offered by this job

Professional development support

International team environment

Career growth opportunities

Job summary

Commodity Supplies AG is seeking a Senior IT Support & Infrastructure Administrator to join our growing IT team. This role blends advanced technical support with hands-on infrastructure administration in an international environment.

The successful candidate will provide L2/L3 support, administer Microsoft 365 and Entra ID, manage identities, devices, and network services, and lead upgrades and security initiatives across Windows and macOS endpoints.

Qualifications

• Several years in IT Support, Systems Administration or IT Infrastructure roles.
• Bachelor or vocational IT degree.
• Fluent English; conversational German is a plus.
• Certifications (Microsoft, CompTIA, ITIL) are advantageous.
• Strong experience with Microsoft 365 and Entra ID.
• Experience with identity/access management, SSO, and enterprise apps.

Responsibilities

• Provide advanced L2/L3 support for hardware, software, network and infrastructure issues.
• Troubleshoot complex incidents, perform root-cause analysis and implement permanent solutions.
• Administer and support Microsoft 365, Entra ID, MFA and SSO.
• Manage users, groups, permissions and access rights per policy.
• Configure, maintain and support Windows and macOS endpoints.
• Support DNS, DHCP, VLANs, switches, access points, and firewall configurations.
• Monitor infrastructure health, backups and security compliance.
• Manage IT assets, software inventory and licensing.
• Coordinate with external IT vendors and partners on issues and projects.
• Participate in upgrades, migrations, implementations and improvements.
• Maintain documentation and procedures; support onboarding/offboarding and end-user training.

Skills

IT support

Infrastructure admin

English fluency

German desirable

Vendors & projects

Education

Bachelor/ vocational IT degree

Tools

Microsoft 365

Entra ID

MFA/SSO

Windows/macOS

Job description

We are looking for an experienced and hands-on Senior IT Support & Infrastructure Administrator to join our growing IT team. This is an exciting opportunity for a seasoned IT professional who enjoys combining advanced technical support with infrastructure administration in a dynamic international environment.

What You'll Be Doing

• Provide advanced L2/L3 support for hardware, software, network, and infrastructure-related issues.
• Troubleshoot complex technical incidents, perform root-cause analysis, and implement permanent solutions.
• Administer and support Microsoft 365, Microsoft Entra ID, identity management, MFA, and SSO solutions.
• Manage users, groups, permissions, and access rights in accordance with company policies.
• Configure, maintain, and support Windows and macOS endpoints.
• Support network operations including DNS, DHCP, VLANs, switches, access points, and firewall configurations.
• Monitor infrastructure health, availability, backup success, and security compliance.
• Manage IT assets, software inventory, and software licensing.
• Coordinate with external IT vendors and technology partners to resolve technical issues and deliver projects.
• Participate in infrastructure upgrades, migrations, implementations, and continuous improvement initiatives.
• Maintain clear and accurate technical documentation and procedures.
• Support onboarding, offboarding, and end-user training.

Who We're Looking For

Required Qualifications

• Several years of experience in IT Support, Systems Administration, or IT Infrastructure roles.
• Vocational degree or Bachelor's degree in Information Technology, Computer Science, or a related discipline.
• Professional fluency in English; conversational German is highly desirable.
• Relevant Microsoft, CompTIA, ITIL, or equivalent certifications are advantageous.
• Strong experience administering Microsoft 365 and Microsoft Entra ID.
• Experience with identity and access management, SSO, and enterprise applications.
• Hands-on experience with virtualized environments, Windows servers, and infrastructure administration.
• Sound knowledge of TCP/IP, DNS, DHCP, VLANs, networking, and troubleshooting.
• Experience with endpoint management, cybersecurity, and backup solutions.
• Familiarity with IT asset management, software licensing, and vendor management.
• Strong problem-solving and analytical skills.
• Excellent communication and stakeholder management abilities.
• Ability to work independently while collaborating effectively with technical and business teams.

What Success Looks Like

Success in this role will be measured through:

• Fast and effective resolution of L2/L3 incidents.
• High infrastructure availability and reliability.
• Successful delivery of infrastructure improvements and technical projects.
• Strong Microsoft 365 and Entra ID administration practices.
• Accurate asset and licensing management.
• Backup reliability and recovery readiness.
• Effective security monitoring and incident response.
• Positive user feedback and stakeholder satisfaction.
• High-quality system documentation and operational processes.

Why You Should Join Us

• Opportunity to play a key role in shaping and improving a modern enterprise IT environment.
• Exposure to a broad technology landscape including Microsoft 365, cloud services, virtualization, networking, and cybersecurity.
• Collaborative international workplace with close interaction across the business.
• Ownership of meaningful infrastructure projects and technical initiatives.
• Professional development and certification support.
• Long-term career growth opportunities within a growing organization.
• Competitive compensation and benefits package.

Ready to Make an Impact?

If you are a technically strong IT professional who enjoys solving complex challenges, improving infrastructure, and delivering outstanding internal customer support, we would love to hear from you.