Senior Business Systems Engineer (based in Crete)

International Airport of Heraklion, Crete S.A. is currently looking for a: Senior Business Systems Engineer (based in Crete) Responsibilities - Support Microsoft 365, Entra ID, Intune, Windows 365 and related services within the team service boundary - Work with identity lifecycle, enterprise applications, service principals, MFA, Conditional Access and device-management dependencies - Use PowerShell, APIs, Git and modern engineering practices to automate repeatable administration and improve service reliability - Diagnose Windows Server, Active Directory, DNS, virtualization, storage, Azure, database, backup and certificate dependencies where they underpin an owned Business System - Lead technical investigations for escalated incidents, participate in RCA and maintain clear evidence, workarounds and recovery actions - Provide L2 support for enterprise and departmental Business Systems and retain technical ownership through incident resolution - Troubleshoot application, identity, integration, data-access and service-dependency issues end-to-end before escalation - Support HDS / ITSM, EMS / Enterprise Management, SAP / ERP technical dependencies, Power Platform, Power BI / Fabric and other assigned business applications - Participate in FAT/SAT/UAT, supplier handover, go-live, hypercare and transition to BAU Requirements - Bachelor's degree in Computer Science, Information Technology, Information Systems, ICT / Systems Engineering or a related technical field; a relevant Master's degree is an asset - Relevant Microsoft 365, Azure, Entra, IT service management or comparable enterprise-technology certifications are highly desirable - Minimum 5 years of hands-on experience in complex ICT environments with enterprise applications, Microsoft cloud services, identity, automation or production support; senior ownership, mentoring or supplier coordination is an advantage - Working knowledge of Azure, Windows and identity fundamentals, with PowerShell or comparable scripting / automation capability - Excellent command of English, both written and verbal Competencies - Strong team orientation, ownership mindset, communication and problem-solving skills - Structured incident diagnosis, problem solving and clear technical communication - Ability to coordinate effectively with users, ICT peers and external suppliers