Office & Operations Manager H/F

Alta Ares is a deeptech startup founded in 2024, building real-time AI for defense operations (ISR, C-UAS). Our primary clients are NATO-aligned militaries, with regular deployments during live exercises and operational demonstrations.

Raised €2M in pre-seed funding in May 2025 and €35M in Series A funding in June 2026, we are scaling rapidly to become a leading European defense technology company.

Our products include:

• Real-time AI ISR modules deployable on drones and tactical platforms
• Counter-UAS solutions enabling autonomous drone takeover in GNSS-denied environments
• Full-stack MLOps platform for training and deploying military-grade AI models
• Data fusion and trajectory prediction systems

We are looking for an Office & Operations Manager to become the operational backbone of our Paris headquarters. You will ensure that our teams can operate efficiently by managing the office environment, coordinating administrative operations, supporting leadership, and delivering an exceptional experience for employees, visitors, and external stakeholders.

This is a highly visible, high-ownership role at the heart of the company. You will interact daily with engineers, executives, military partners, suppliers, and institutional stakeholders while helping Alta Ares scale its internal operations.

• Own the day-to-day operation of the Paris office, including facilities, supplies, equipment, and workspace organization
• Manage relationships with landlords, service providers, and suppliers, ensuring service quality and cost efficiency
• Coordinate maintenance, deliveries, office improvements, and workspace projects
• Maintain a professional, safe, and efficient working environment aligned with Alta Ares' culture and standards
• Manage office budgets and proactively anticipate operational needs

• Serve as the first point of contact for visitors, customers, partners, and institutional stakeholders
• Coordinate meeting rooms, visitor access, demonstrations, and executive visits
• Manage incoming calls, mail, deliveries, and courier services
• Ensure a welcoming, professional, and security-conscious office environment

• Support the CEO and leadership team with travel arrangements, expense management, scheduling, and logistics
• Coordinate internal meetings, offsites, and operational projects
• Assist with the preparation of presentations, briefings, and internal documentation
• Facilitate coordination across teams on operational and administrative topics

• Manage onboarding logistics for new employees, including equipment, office access, and workspace setup
• Maintain organized records of contracts, suppliers, and administrative documentation
• Support finance operations through invoice tracking, purchase order management, and supplier coordination
• Help design and improve internal processes, tools, and workflows as the company scales

• Organize internal events, team gatherings, offsites, and company celebrations
• Coordinate logistics for customer visits, demonstrations, and events hosted at Alta Ares
• Contribute to building a positive, rigorous, and mission-driven workplace culture

• 3–6 years of experience in Office Management, Operations, Executive Assistance, or a similar role
• Experience working in a fast-paced startup, scale-up, consulting firm, or professional services environment
• Proven ability to manage facilities, suppliers, and administrative operations end-to-end
• Experience supporting senior leadership or C-level executives
• Previous exposure to defense, aerospace, government, or highly regulated industries is a plus

• Exceptionally organized, rigorous, and proactive
• Strong interpersonal and communication skills with the ability to interact confidently with a wide range of stakeholders
• Highly trustworthy and discreet when handling sensitive information
• Resourceful, hands-on, and execution-oriented
• Comfortable managing multiple priorities in a dynamic environment
• Fluent in both French and English
• Proficient with modern office and productivity tools (Google Workspace, Notion, expense management tools, etc.)

• Build cutting-edge AI systems deployed in real-world defense operations
• Work directly with military end-users and strategic institutional partners
• Join one of Europe's fastest-growing defense technology startups
• High ownership and direct impact from day one
• Competitive compensation package
• Based in central Paris (75008)