Head of IT

PROPHESEE; Paris; Sur place; EUR 120 000 - 150 000; Plein temps

Résumé du poste

PROPHESEE, a Paris-based Deep Tech company, seeks a senior, hands-on IT professional to own and evolve the IT environment, spanning infrastructure, cloud, identity, security and governance.

You will secure, monitor, backup and document operations, manage Google Workspace and Microsoft Entra ID, coordinate external providers, and drive hardening and incident response in a fast-growing setting.

Qualifications

• Senior, hands-on IT professional with a focus on operating, securing and improving IT environments.
• Strong expertise in Microsoft Entra ID, SSO, MFA, CA and privileged access.
• Experience with Google Workspace administration and collaboration tools.
• Proficient in Linux environments and systems administration.

Responsabilités

• Take ownership of the company IT infrastructure and operational environment.
• Maintain and improve cloud and on‑premise systems and services.
• Ensure availability, reliability, maintainability and security of IT services.
• Manage identity and access management, including SSO, MFA, CA and privileged access.
• Administer or supervise Microsoft Entra ID and related identity technologies.
• Administer or supervise Google Workspace ecosystem and policies.
• Manage certificates, secrets and access rights.
• Apply hardening practices and contribute to IT security policies.
• Maintain monitoring, backup, restoration and disaster recovery capabilities.
• Coordinate external IT providers and ensure knowledge transfer.

Connaissances

IT Infrastructure

Identity & Access Mgmt

Google Workspace

Linux

Cloud Infrastructure

Networking & Security

Monitoring & DR

Documentation & Governance

Supplier Management

DevOps Tools

CISO Experience (Plus)

Description du poste

About PROPHESEE

Inspired by human vision, PROPHESEE's technology combines patented sensors and AI algorithms to go beyond the limits of conventional approaches. It captures information differently, revealing dynamics that remain invisible to traditional systems. This breakthrough redefines computer vision and opens exciting technical challenges in cutting‑edge fields such as autonomous vehicles, industrial automation, robotics, IoT, security and surveillance.

About PROPHESEE

Inspired by human vision, PROPHESEE's technology combines patented sensors and AI algorithms to go beyond the limits of conventional approaches. It captures information differently, revealing dynamics that remain invisible to traditional systems. This breakthrough redefines computer vision and opens exciting technical challenges in cutting‑edge fields such as autonomous vehicles, industrial automation, robotics, IoT, security and surveillance.

You will provide the secure and reliable IT foundation behind a fast-moving Deep Tech company. By improving infrastructure, identity, collaboration services, security and operational governance, you will directly enable engineering and business teams to work efficiently while supporting the company’s growth and increasing technological maturity.

The role is based in Paris (75011)

The mission

Take ownership of the company’s IT environment and ensure that it is secure, reliable, maintainable and scalable. The role covers infrastructure, cloud and on-premise systems, identity and access management, security, monitoring, backup and recovery, documentation and IT operational governance.

Job details

• Take ownership of the company IT infrastructure and operational environment.
• Maintain and improve cloud and on-premise systems and services.
• Ensure availability, reliability, maintainability and security of IT services.
• Manage identity and access management, including SSO, MFA, Conditional Access and privileged access.
• Administer or supervise Microsoft Entra ID and related identity technologies.
• Administer or supervise Google Workspace, including users, groups, Gmail, Drive, sharing policies, security settings and account lifecycle management.
• Manage technical identities, certificates, secrets and access rights.
• Apply infrastructure and system hardening practices and contribute to IT security policies.
• Maintain monitoring, alerting, backup, restoration and disaster recovery capabilities.
• Manage IT incidents and maintain documented recovery procedures.
• Maintain architecture, operating procedures and runbooks.
• Coordinate external IT providers and suppliers, and ensure appropriate knowledge transfer.

Key deliverables

• Current-state and target IT architecture documentation with clear ownership of systems and services.
• Governed identity and access model covering Microsoft Entra ID, SSO/MFA and privileged access.
• Operational Google Workspace administration and documented user / group / sharing policies.
• Monitoring and alerting coverage for critical IT services.
• Tested backup, restore and disaster-recovery procedures.
• Documented incident, access, recovery and operating procedures / runbooks.
• Structured management of external IT suppliers and knowledge transfer to the internal team.

Performance indicator

• Availability and reliability of critical IT services.
• Incident volume, resolution time and recurrence of known operational issues.
• Timeliness and accuracy of user access provisioning, modification and deprovisioning.
• Successful execution of backup restoration and disaster-recovery tests.
• Coverage and closure of identified security, hardening and access-control gaps.
• Completeness and currency of IT documentation and runbooks.
• Quality of provider management, service continuity and internal knowledge transfer.

Travel Requirements

Occasional travel may be required

Required Qualifications, Experience, And Skills

We are looking for a senior, hands‑on IT professional who enjoys operating, securing and continuously improving a company’s IT environment in a fast-moving environment.

• IT Infrastructure & Operations — essential: Strong, hands‑on experience managing and improving corporate IT infrastructure and operations. Ability to balance day‑to‑day operational excellence with longer‑term infrastructure improvements.
• Identity & Access Management — essential: Solid expertise in Microsoft Entra ID, SSO, OIDC/SAML, MFA, Conditional Access, privileged access and account governance. Strong understanding of identity, authentication and access‑control principles.
• Google Workspace — required: Practical experience or good familiarity with Google Workspace administration and related collaboration tools.
• Linux — required: Strong knowledge of Linux environments and systems administration.
• Cloud Infrastructure — required: Experience operating and securing cloud infrastructure, ideally AWS and/or OCI.
• Hybrid Environments — desirable: Experience managing environments combining cloud and on‑premise infrastructure.
• Networking & Security — required: Good understanding of networking, authentication, certificates, infrastructure security and system hardening.
• Monitoring, Backup & Disaster Recovery — required : Experience setting up and operating monitoring, alerting, backup, restore and disaster recovery processes. Familiarity with tools such as Grafana, Prometheus, Veeam, Velero, or equivalent solutions.
• Documentation & IT Governance — required: Ability to establish clear operating procedures, runbooks and ownership models, and to maintain high‑quality, up‑to‑date technical documentation.
• Supplier & Stakeholder Management — required: Ability to manage external IT providers and build effective relationships with both technical and non‑technical stakeholders.
• CISO Experience — a plus: Previous experience as a CISO, particularly within a startup or high‑growth technology company, would be an advantage.
• DevOps & Development Infrastructure — a plus: Experience with CI/CD, GitHub Actions, Jenkins, Kubernetes, Terraform, Ansible or development infrastructure would be beneficial, but is not required.

Soft Skills

• Leadership and mentoring abilities
• Excellent communication and stakeholder management skills
• Problem‑solving mindset with strong crisis management capabilities
• Ability to prioritize, plan, and deliver in a fast‑paced environment
• High level of rigor, ownership, and reliability

Language skill : fluent oral and written communication in French and English is mandatory