Experis is currently recruiting on behalf of one of its clients based in Luxembourg: M365 System Administrator (m/f/x) Your responsibilities: Administer, monitor, and maintain Microsoft-based system environments with a strong focus on M365 Manage and optimize Microsoft 365 services (Exchange Online, SharePoint, OneDrive, Teams, Azure AD) Ensure identity, access management, and security policies are properly implemented and maintained Handle incidents, service requests, and changes in line with ITIL processes Participate in M365 migrations, tenant configurations, and digital workplace projects Ensure compliance, data protection, backup, and governance best practices Automate administrative tasks and reporting using PowerShell and related tools Maintain accurate technical documentation and operational procedures Collaborate with security, network, and support teams to ensure service availability and user satisfaction Continuously improve M365 services, performance, and user experience Your profile: You have a Bachelor’s degree in Computer Science or a related field You have solid experience in system administration with a s trong focus on Microsoft 365 environments You have hands-on experience with xniyctf Azure AD, Exchange Online, and Microsoft security features You are comfortable with PowerShell automation and administration tools You have a good understanding of identity management, security, and compliance concepts You are organized, autonomous, and service-oriented You are motivated by modern workplace technologies and continuous improvement You are fluent in English and in French (mandatory)