System Administrator

As part of strengthening our teams, we are looking for a senior System Administrator.

MAIN ACTIVITIES:

*Operation and maintenance of system infrastructures in operational condition:

*Operation of Exchange Online messaging and Teams / Teams Voice services

*Administration and maintenance of VMware virtualised environments

*Handling and processing of level 2 and 3 incidents and requests within the system scope

*Participation in emergency actions or situations related to security incidents

*Daily operation of EDR solutions

*Contribution to the securing and hardening of servers

*Migration of obsolete operating systems to supported versions

*Backup management and participation in restoration tests

*Development, maintenance and deployment of administration scripts

*Implementation and operation of a centralised script management solution for the infrastructure unit

*Participation in ticket dispatch and follow-up according to the defined organisation

*Writing and updating technical and operational documentation

*Knowledge of IDM / IAM / RBAC tools is a plus.

PROFILE:

*ES technician training or equivalent

*At least 5 years of professional experience in a similar position

*Demonstrated mastery of Windows Server environments (2016, 2019, 2022)

*Advanced Active Directory administration

*Maintaining critical system services in operational condition

*Planning and deployment of security patches

*Monitoring compliance and patching levels

*Management of restarts, maintenance windows and service impacts

*Administration and operation of Microsoft 365 / Entra ID (Azure AD)

*Operation of Exchange Online

*Administration of the VMware vSphere environment

*Basic knowledge of storage environments (SAN / NAS)

*Operational mastery of EDR tools (Microsoft Defender for Endpoint or equivalent)

*Active participation in cyber incident response

*Contribution to system hardening

*Good mastery of PowerShell scripting in an operational context

*Use of version control tools (Git or equivalent)

*Knowledge of ITIL practices (incidents, problems, changes).