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Intern Sales

Posted 13 May 2026
Share:
Work experience
0 to 1 years
Full-time / part-time
Full-time
Job function
Salary
€325 per month
Degree level
Required languages
English (Fluent)
Dutch (Fluent)
Start date
1 September 2026

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Looking for an internship where you can make real impact while you learn? At Dopper, you dive straight into mission-driven sales and operations, gaining hands-on experience that fuels business growth and helps us end packaged water.

If that excites you, keep reading.

Drop into the role 💧

At Dopper, we’re on a mission to end packaged water. As our Sales Intern, you will be part of the full Sales team, with a special focus on the Dutch retail and B2B market. You’ll support key projects, bring fresh ideas to the table, and help us work smarter to maximise our impact. Most importantly, you’ll play a direct role in spreading the Dopper mission every single day.

Ready to roll up your sleeves and make a difference?

Responsibilities:

  • Create and update lead lists and support outreach to potential partners, making waves globally 🌍
  • Conduct market and channel research to map mission and commercial opportunities.
  • Contribute to the Dutch retail network through store visits, presenting innovations and retail solutions, conducting field research, and connecting with retailers around the Dopper mission and portfolio.
  • Help with sales questions from Customer Support and setup forms so orders run smoothly.
  • Track results, product mix, and customer data to guide the sales team and uncover insights.
  • Share ideas and feedback to make sales processes even more efficient and mission-focused.

This is you, right?

  • You are currently studying Business Administration, International Business, Hotel Management or another study with a strong focus on sales, commercial processes, or a related field and are looking for a dynamic internship.
  • You are living in the Netherlands at the time of the internship.
  • You have a driver's license.
  • You are available for a minimum of 5 months, for 32 or 40 hours per week as from 1st of September, 2026.
  • For this specific internship, it is necessary you are fluent in Dutch and English.
  • You have a business mindset and you love spotting opportunities while keeping the team moving fast and focused.
  • You are proactive, communicative, and confident speaking with both colleagues and customers in a fast-moving scale-up environment.

What's in it for you?

At Dopper, you’ll gain hands-on experience in sales and operations, develop your skills, and work closely with a dynamic team. Besides that, you will receive:

  • Your own personalised Dopper bottle
  • Internship fee of € 325,- on fulltime basis
  • 2,4 holidays days per month based on 40-hours a week
  • The day of your birthday off
  • Dopper laptop
  • Travel allowance with a max of €365 per month (if you live more than 10 km away from the office and don't own a free-travel OV card)
  • Delicious plant-based lunch at our office for free
  • Chance to learn on the job and have responsibilities
  • FUN quarterly meetings, team events and lots of celebrating
  • Unlimited access to the platform 'Open Up'

At Dopper we’re on a mission. Empowering people to choose reusable over single-use water bottles, to protect our world’s water sources. That's why we offer a sustainable alternative, the Dopper Bottle. To bring everywhere you go, so you can drink from the tap. Next to that, we invest in education about plastic pollution and we invest in water projects. Our goal? Crystal-clear water. In every ocean, from every tap!

Retail
Haarlem
Active in 5 countries
60 employees
40% men - 60% women
Average age is 36 years