At Prose, we don’t believe in “one-size-fits-most.” We create custom hair care that’s inclusive to all hair types, needs, and preferences. Each of our hair care products is customized to a person’s hair needs based on the results from an online consultation. The individual data is processed through a proprietary algorithm and made-to-order in the Prose lab using natural active ingredients. Marrying emerging technologies with the best in beauty, Prose is truly creating something special.

This is the opportunity to join a fast-growing startup and an energetic team that works together to deliver creative solutions that are transforming the way people think about and shop for hair and skin care. We’re looking for talented problem solvers who lead with passion and who face any task with a positive mindset.

Position Summary

We are seeking a Sustainability Manager Intern to join our R&D team in Paris and support Prose’s sustainability initiatives. You will report to the Sr. Director of Scientific Affairs & Sustainability and collaborate closely with internal stakeholders (Social Impact, R&D, Operations, People Team…) as well as external partners and contractors.

Key Responsibilities

• Coordinate Prose’s sustainability projects and initiatives in collaboration with key internal and external partners (carbon footprint, B Corp recertification, etc.).
• Contribute to the management of compliance with EPR (Extended Producer Responsibility) regulations and to the monitoring of associated obligations.
• Support the facilitation and management of the “Champions of Sustainability at Prose” committees, helping to co-build a cross-functional roadmap for impact reduction.
• Conduct technological, competitive, and regulatory monitoring related to sustainability, innovation, and market trends.
• Contribute to the definition, tracking, and analysis of sustainability KPIs, and ensure their integration into the annual sustainability report.

Key Candidate Requirements

• Currently enrolled in a Master’s Degree with a major in sustainability and social innovation or ESG management.
• First experience in sustainability-related project management is a plus. Knowledge of the cosmetics industry is also appreciated
• Creativity and curiosity
• Ability to work autonomously, with minimal administrative support
• Fluent in French and English
• Strong interpersonal skills and cross-cultural sensitivity

Start date and duration : Feb-March 2026 for 6 months

Prose Values

Intentional Inclusivity

• We know the best ideas come from open minds and willingness to listen. While our products cater to the individual, an invitation into our process is always open to our community.
• We value our differences and diverse backgrounds by communicating openly, managing with transparency and striving to understand one another’s perspective. It’s a key ingredient to our innovation.

Connected Collaboration

• Our strength as a group will outlast our efforts as individual contributors. With offices across countries (and across boroughs) staying inventive and agile deepens our clear vision and consistent communication.
• We stay in a spirit of entrepreneurial collaboration: We do not have consensus at all times, but we trust one another to work toward our common goals. Our success is an expression and result of our progressive and gratifying teamwork.

Driven, Together

• We value ownership and coaching that encourages employees to think constructively and creatively about the business. We view employees as leaders and individuals who are accountable, resourceful and responsible. Anyone and everyone is encouraged to lead.
• We recognize that in order to continue thinking one step ahead, we will need to try new things. We strive to provide an open environment that accepts this truth making space for new ideas to emerge.

Humanity Always

• We assume good intentions in every interaction keeping ourselves accountable for the climate we create. We seek to understand our co-workers through this lens of conscious bienveillance, authenticity and fellowship.
• We operate with the intention of preserving resources, creating an environment we can all live in — for our business and the world. Sustainable care is essential to our ethos as an organization. We take a mindful approach to how we think about our people (employees) and our planet.