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