Role Overview
We are looking for a Chief of Staff to support the CEO and Head of Operations in driving day-to-day execution across C12.
This is a highly operational role focused on bringing structure, rigor, and velocity to the company, while scaling the organization and preserving our mindset.
You will act as a force multiplier for the CEO and Head of Ops, ensuring that priorities are clear, key initiatives are delivered on time, and communication flows effectively across the organization.
You will not be expected to define the strategy, but to make sure it is executed.
Key Responsibilities :
- Anticipate quarterly OKR cycles and maintain the framework in linear
- Track company priorities and key transversal projects end-to-end
- Maintain clear visibility on progress (Linear updates, critical initiatives)
- Ensure consistency and quality of reporting across teams
- Support the CEO and Head of Ops on ad-hoc topics (incl. fundraising efforts)
- Drive cross-functional operational projects
- Organize and coordinate leadership sessions (preparation, notes, follow-ups)
- Act as a connective layer with teams to reduce friction and increase alignment
- Support preparation of weekly ExCom (agenda, metrics readiness, action tracking, company communication)
- Prepare internal presentations (Monday meetings, quarterly meetings)
- Support external materials (board decks, company presentations, talks) with the marketing team
- Contribute to thought leadership topics with Marketing
- Assist in preparing CEO interventions (calls, presentations, podcasts)
- Help deploy AI tools, prompts, and workflows across teams
- Support identification and rollout of practical AI use cases
- Coordinate AI training and change management initiatives
- Track ROI / impact of AI initiatives
About You :
- 2–4 years of experience in consulting, operations, or fast-paced startup environments
- Strong execution skills and a reputation for reliability
- Highly organized, structured, and detail-oriented
- Strong written and verbal communication skills in French and English
- Comfortable handling multiple topics in parallel
- High level of ownership and follow-through
- Interest in AI and operational efficiency tools
- Low ego, strong sense of responsibility, and team-oriented mindset
What's in it for You :
- A hands-on role at the core of company execution
- Direct exposure to how a deeptech company operates and scales
- Close collaboration with the CEO and Head of Operations
- A fast-paced environment with a steep learning curve
What we offer:
- €55,000 - €62,000 per year
- Stock options for every employee (BSPCE/ESOP)
- Two incredible office spaces in the heart of Paris
- Sponsored trip to conferences around the world
- A highly dynamic international team
- Swile meal vouchers
- Vibrant office culture (team lunches, offsite events, Friday breakfasts..)
- Mental health support with moka.care
- Training budget/ Annual Learning & Development Allowance
- Sabbatical leave (after 2 years in the company)
Skills Required
- 2-4 years experience in consulting, operations, or fast-paced startup environments
- Strong execution skills and reputation for reliability
- Highly organized, structured, and detail-oriented
- Fluent written and verbal communication in French and English
- Ability to manage multiple topics in parallel and follow through with high ownership
- Experience with OKRs, execution tracking, and cross-functional project coordination
- Experience preparing internal and external presentations and executive communications
- Interest in AI and operational efficiency tools; experience deploying AI tools, prompts, or workflows
What We Do
C12 is building reliable quantum computers. The company is a spin-off from ENS launched in January 2020 by twin brothers Matthieu and Pierre Desjardins to supercharge the development of the lab’s promising new quantum technology. Quantum computing has the potential to change our lives. But frequent errors limit the technology’s viability. We are tackling the fundamental issue: the nature of the hardware itself. We are tapping into the simplest material–carbon–to drive a technological breakthrough in the field. Unlike other quantum computers, we use carbon nanotubes as the fundamental building block of our processor. By combining the power of an ultra-pure material with an easy-to-manufacture semiconductor device, we are building a scalable platform for quantum computing. Our executive co-founders bring a unique combination of scientific excellence and business skills to the company. Our team is made up of the world’s most accomplished experts in quantum electronics and carbon nanotube science. Our scientific advisors are renowned scientists and pioneers in spin qubits: Dr. Takis Kontos, Dr. Matthieu Delbecq and Dr. Jérémie Viennot. In June 2021, C12 secured a $10 million seed round with funding from 360 Capital, Bpifrance (Digital Venture Fund), Airbus Ventures, BNP Paribas Développement, and Octave Klaba (OVHcloud), and additional grants from Bpifrance and the Ile-de-France Region. We are leading quantum’s next material breakthrough, and we are just getting started. Silicon enabled the emergence of classical computing – it’s time for carbon to do the same for quantum !
