Head of Sales

Founded in 2020 and based in the heart of Paris, C12’s mission is to be at the center of one of the biggest technological breakthroughs of the century and change the course of history by building a universal quantum computer.

At C12, we believe that achieving a true breakthrough in quantum computing requires rethinking the fundamentals. That’s why our founders—deeply rooted in academic and engineering excellence—have chosen carbon nanotubes as the building blocks of our quantum processors. This ultra-pure material dramatically reduces error rates, boosts performance, and minimizes hardware overhead—key ingredients for scalable, fault-tolerant quantum computing. By crafting a unique approach that scales, we aim to revolutionize quantum computing just as silicon transformed classical computing.

Since our founding, we’ve raised over €25 million in funding, published 11 scientific papers, and secured 8 patents. Today, our fast-growing team of 85, including 20 Ph

Ds, has over 25 nationalities represented. We have our own cutting‑edge lab spaces in Paris' historic Panthéon district, where scientists, engineers, and innovators work side‑by‑side to tackle some of the most exciting technical challenges of our time.

If you're passionate about shaping the future of quantum technology and want to make a real impact, C12 offers a unique environment to grow, learn, and innovate.

As Head of Sales, reporting directly to the CEO, you will join us at a pivotal moment in our growth: scaling founder‑led revenue across heterogeneous channels. We are a quantum computing company with existing revenue and active contracts with industrial groups and defence organisations. Sales today are founder‑led and span services and long‑term hardware programs.

We are now hiring a senior commercial leader to take ownership of revenue growth, structure and professionalize our sales motion, and lead complex, high‑credibility sales across industry, defence, and public markets. You will work closely with the CEO and technical leadership to translate deep scientific innovation into credible commercial narratives, and to turn early traction into a repeatable commercial engine without compromising our scientific ambition.

Key Responsibilities

Owning end-to-end sales motions, from initial discovery through alignment and closing

Leading customer discovery and translate customer pain points into compelling commercial narratives and structured offers, grounded in our technical capabilities and competitive advantages

Driving technical and commercial alignment with customers, sometimes years ahead of delivery

Moving opportunities forward in long, multi-stakeholder sales cycles

Maintaining disciplined pipeline management and forecasting, tracking all touchpoints and follow-ups in CRM tools

Attending industry fairs, conferences, and targeted networking events to generate leads and nurture strategic relationships

Acting as a bridge between science, engineering, and commercial reality, working cross‑functionally with engineering, product, and R&D to ensure customer needs are understood and acted upon

Brainstorming, iterating, and co‑developing go‑to‑market strategy and long‑term business direction with the CEO

Qualifications & Experience

You have 8-10 years owning and closing complex, technical sales

You have a master's degree in engineering, computer science, physics or any related field

You have experience in deep‑tech or computing hardware and therefore have strong technical fluency

You are comfortable operating in environments with long sales cycles and political buying processes

You are familiar with high‑touch, consultative and relationship‑driven sales

You are able to sell evolving technology with credibility, transparency, and confidence

You are a strong communicator; able to engage effectively with engineers, researchers, executives, and procurement stakeholders

You are fluent in French & in English

Compensation & Benefits

€100,000 - €120,000 per year

Stock options for every employee (BSPCE/ESOP)

Sponsored trip to conferences around the world

A highly dynamic international team

Swile meal vouchers

Mental health support with moka.care

Training budget / Annual Learning & Development Allowance

Sabbatical leave (after 2 years in the company)

Vibrant office culture (two office spaces in the heart of Paris, team lunches, offsite events, Friday breakfasts..)

You should join us if... You want to contribute to achieving landmark results in quantum computing, making a difference in the emerging quantum technologies.

You want to work within a 80‑people team with various backgrounds in nanofabrication, quantum electronics, and carbon nanotube science to create a revolutionary quantum computing processor.

You want to thrive in an exceptional scientific environment with several industrial and academic partners.

You share our values (excellence, scientific integrity, diversity, curiosity, and care) and want to help us define our product‑focused culture and ambition to accelerate.

We still encourage even if you don’t meet all the requirements. Rest assured, we are committed to finding the right fit for our team and are open to adjusting compensations based on skills and experiences.

Applications from women are especially welcomed!

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