6-MONTH INTERNSHIP - Starting January 2027 - Process Engineering - Master's 1/2 - EUR1700/month

L'Oréal; Aulnay-sous-Bois; On-site; EUR 17,000 - 21,000; Full time

Benefits offered by this job

Remuneration €1,700 per month

Transportation: 75% of publicTransport

Remote working: 1 day per week

Paid Leave: 1 day per month

Job summary

L’Oréal Group invites a Master 2 or final-year engineering student for a 6-month Process Engineering internship starting January 2027 in Île-de-France. Work within the Process & Pilot Expertise team to industrialize and optimize manufacturing processes for makeup, hair color or hygiene.

You'll develop and optimize processes, run lab and workshop-scale trials with DOE, participate in scale-up at plant level, and lead cross-functional improvement projects with R&I, Operations, and plants.

Qualifications

• Enrolled in Master 2 or final-year engineering program with a focus on process/chemical engineering.
• Strong experimentation, rigorous analytical and scientific mindset.
• Curious, autonomous, adaptable to pace and workload; good interpersonal skills.
• Interest in project management.
• Fluent in English and French.

Responsibilities

• Study existing processes and propose improvements in quality, robustness and performance.
• Run lab- and workshop-scale trials with controls and design experiments (DOE).
• Run pilot batches and scale up at plant level.
• Lead cross-functional process improvement projects with diverse stakeholders.

Skills

Experimentation

Analytical mindset

Autonomy

Project management interest

English and French fluency

Education

Master's degree in engineering (Master 2) or final-year program

Job description

6-MONTH INTERNSHIP - Starting January 2027 – Process Engineering – Master's ½ - €1700/month

Life is too short for a boring career!

At L’Oréal Groupe, work doesn't mute you, it amplifies you. We believe your career should give you the same thrill, drive and fulfillment as your personal interests. Here, creativity drives innovation and ideas become impact. Grow across brands, markets, and divisions, and take your career in any direction you choose. With the global scale of L’Oréal, your growth knows no boundaries.

Why join L’Oréal?

88% of our interns are proud to work at L’Oréal.

87% recommend L’Oréal for an internship.

(Internal Satisfaction Survey – June 2026)

Ready for an experience that makes a difference?

Your missions

As a member of the Process & Pilot Expertise team (DGO), within a dynamic team of engineers, you will contribute to the industrialization and optimization of L'Oréal manufacturing processes (make-up, hair color or hygiene). Your main responsibilities will include:

• Development and optimization: study existing processes and propose improvements in quality, robustness and performance.
• Experimentation: run lab- and workshop-scale trials with all associated controls, and design experiments (DOE) to understand process levers.
• Scale-up and industrialization: run pilot batches, analyze gains and take part in the scale-up at plant level (from a few dozen kilos to industrial pilot scale of several tons).
• Project management: lead cross-functional process improvement projects (quality, safety, sustainability, agility, performance), working with varied stakeholders (R&I, Operational Development, plants, Global Manufacturing).

Your profile

• You are enrolled in a Master 2 or final-year engineering program, looking for a final-year internship, with a specialization in process engineering or chemical engineering.
• Enjoy experimentation and hands-on work, rigor, analytical and scientific mindset.
• Curiosity, autonomy, adaptable to changes in pace and workload, good interpersonal skills.
• Interest in project management.
• A plus: comfort with workshop or laboratory work.
• Fluent in English and French.

AI Charter: Our Pact

At L’Oréal, innovation has been in our DNA for over 110 years. Today, AI accelerates this innovation—through skin biotech, the development of connected devices, or creation tools like CreAItech. As we invent the future of beauty, we see Artificial Intelligence as a powerful co-pilot, with the firm belief that technology must always serve people. Aware of the impacts of AI, L’Oréal carefully assesses the social, environmental, and societal impact of its AI systems and works to mitigate any potential or actual harm. This requirement is part of our broader conviction that economic and environmental performance are inseparable. If you would like to learn more about our use of AI, click here.

Your benefits

• Remuneration: €1,700 per month
• Transportation: 75% of public transport costs covered
• Remote working: 1 day of remote working per week
• PaidLeave: 1 day per month

The L’Oréal Groupe Perks

• Access to the L’Oréal Learning Platform to develop your skills
• Staff sales at preferential rates
• Friends & Family sales

• Depending on the campus: gym, concierge services, etc

The Recruitment Process

• Recruiter interview - 30 min:To introduce yourself and discuss the position & the L'Oréal Group
• Meeting with your potential future manager - 45 min:To discuss the missions of the role

L'Oréal Group

Join L'Oréal, the world leader in beauty, present in over 150 countries with a portfolio of 37 international brands across four divisions: Consumer Products, Professional Products, Dermatological Beauty, and Luxury.

At L'Oréal, we create beauty that moves, inspires, and unites. Our mission is to invent the future of beauty by combining the best of technology, science, and natural inspiration, and to offer everyone inclusive, responsible, and forward-looking beauty.

And because equal opportunities and diversity are strong values within the Group, as a beauty leader, we consider every application.

Whatever your gender identity, sexual orientation, visible and/or invisible disability(ies), social or cultural origins, health status, age, religion, or any other element that makes you unique, our teams will carefully review your profile.