IT Administrator - Application & Security (Part-Time) (M/F/X)

About the role

Biggie is a global marketing agency for strategy and activation agency, part of Biggie group, an independent international group of integrated marketing solutions. Biggie's motto is "Partners in growth", and its ambition is to be a partner in the growth of brands, by putting strategic and operational excellence at the service of their performance, and by offering them tailor-made support (marketing strategy, strategic planning, data & analysis, media, digital performance, content creation and adaptation, and business consulting) to meet their business challenges. The agency has 300 experts, including 150 in France, present in 7 countries through 9 international offices (Paris, Marseille, Brussels, Milan, Geneva, Zurich, Prague, Dubai and Sao Paulo). For further information: www.biggie.co The IT Administrator - Application & Security is responsible for the proper functioning, security, and availability of all business applications and digital tools within the organization.Beyond application lifecycle management, this role includes active cybersecurity operations: monitoring security logs across Microsoft 365 and Google environments, managing endpoint security tools (WithSecure, HarfangLab, Ninja One), conducting periodic account reviews, and processing application access requests. 🗒️ Missions Access & Rights Management Create, modify, and revoke user accounts across all business applications (ERP, CRM, collaboration tools, SaaS platforms, etc.) Apply the principle of least privilege and manage role-based access control (RBAC) profiles Process access requests in coordination with HR (onboarding, offboarding, role changes) Manage privileged accounts and administrator credentials securely Maintain an up-to-date user rights registry and document all changes Participate in periodic access audits and user rights reviews Access Revocation & Deletion Disable or delete accounts upon employee departure or role changes (offboarding) Implement automated deactivation workflows in coordination with the HR system and IT Team Ensure full traceability of deletions for audit and compliance purposes Archive user data in accordance with data retention policies and GDPR requirements Application Maintenance & Administration Monitor operational status of production applications (availability, performance, incidents) Plan and deploy updates, patches, and new releases in coordination with software vendors Manage environments (production, staging, development) and deployment procedures Maintain technical and functional documentation for all managed applications Oversee application backups and test restoration procedures regularly Manage software licenses and ensure ongoing compliance (license audits) Helpdesk & Level 1 Support Manage user account setup and password resets across Active Directory, Microsoft 365, and Google Workspace Maintain and update the internal knowledge base with known issues, workarounds, and resolution procedures User Support & Stakeholder Relations Handle Level 2 support tickets related to applications Train users on new features and write user guides and documentation Act as the primary point of contact for business units regarding application needs Collect and prioritize enhancement requests in collaboration with business teams Security & Compliance Ensure compliance with IT security policies (InfoSec) for all managed applications Contribute to the implementation of security audit recommendations Ensure GDPR compliance for data processing carried out through managed applications Manage entitlements in accordance with the company's IT usage policy Cybersecurity Operations & Log Management Validate the cybersecurity posture of all new applications during onboarding and ensure secure decommissioning during offboarding (data wiping, credential revocation, audit trail) Conduct periodic user account reviews and access recertification campaigns across all applications (quarterly or as required by policy); document and remediate anomalies Serve as first-line support for all application access requests via the helpdesk: assess legitimacy, validate with line managers, provision or deny access in accordance with security policies, and log every decision Monitor and analyze Microsoft 365 security logs on a daily basis: Entra ID (sign-in risk, conditional access failures, MFA anomalies), Microsoft Defender for Endpoint/Identity, and Microsoft Purview audit logs Monitor Google Workspace & Cloud security logs: Admin Console audit trail, Alert Center events, login anomalies, Drive sharing violations, and token/OAuth activity Administer and monitor the WithSecure endpoint protection platform: review alerts, manage policy profiles, investigate detections, and ensure endpoint compliance across the device fleet Analyze and triage HarfangLab EDR logs and alerts: investigate suspicious processes, lateral movement indicators, and endpoint telemetry; escalate confirmed threats to the IT Manager with full incident documentation

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