Founders Associate – Internship or Apprenticeship

Job description

About

Estuaire is a climate tech company helping aviation reduce its climate impact through data.

We build advanced analytics and decision tools to help airlines, airports, regulators and aerospace players better understand and reduce emissions across operations.

Our expertise covers both CO2 and non-CO2 effects, including contrails, and combines aviation knowledge, climate science and data modelling.

Based in Paris, Estuaire is a fast-growing team working on high-impact projects with leading players across the aviation ecosystem.

Job Description

As a Founders Associate, you will work directly with Estuaire’s two co-founders and play a central role in building the company. You will contribute to strategic, operational and growth topics, and gain a 360 view of how a climate-tech startup scales.

Your Missions

Business & Strategy

· 
Identify and reach out to potential customers

· 
Pitch our solution and gather product feedback

· 
Support fundraising: investor outreach, pitch decks, follow-ups

· 
Contribute to certifications, partnerships, and ecosystem positioning

Marketing & Communication

· 
Write articles, posts and newsletters on aviation sustainability

· 
Manage communication channels (LinkedIn, newsletter, X)

· 
Monitor performance metrics and suggest improvements

Operations & Internal Work

· 
Draft and review contracts, procurement items and legal documents

· 
Support hiring: screening, interviews, coordination

· 
Contribute to team organization as we grow

Preferred Experience

We are looking for a motivated, curious and impact-driven candidate.

Must-haves

· 
Strong interest in climate, sustainability or aviation

· 
Currently studying business, economics, or a related field

· 
Excellent written English

· 
Autonomy, reliability and the ability to get things done

· 
A creative, problem-solving mindset

Nice-to-haves

· 
Prior experience in startups, consulting or BD

· 
Interest in tech, regulation or environmental policy

· 
French is a plus but not required

We hire for potential, not for perfection!

Recruitment Process

· 
15-minute interview with our current Founders Associate

Motivation, background, expectations

· 
30-minute interview with the co-founders

Conversation about interests and alignment

A short “day-at-work” case to understand your approach to real situations

Additional Information

·  Contract Type: Internship (Between 6 and 12 months)
·  Start Date: 01 September 2026
·  Location: Paris
·  Occasional remote authorized