Administratieve vacatures Haarlem

Join the Under Armour Rookie Program Internship: 1 September 2026 – 30 June 2027

The Under Armour Rookie Program Internship is designed to give you the opportunity to learn, grow, and work on real business challenges. As a Rookie, you will be trusted with a strategic project that challenges you to think critically, collaborate cross‑functionally, and create impact.

Throughout the internship, you will gain a holistic understanding of how a global sports brand operates, combining business exposure, structured learning, and real‑world application:

• Strategic project ownership
• Go-To-Market, Commercial, Retail, and Sports exposure
• Mentorship and guidance by industry experts
• Cross-functional and international collaboration
• Development opportunities, workshops, and fun internal events

At UnderArmour, we believe your experience should go beyond your desk. As a Rookie, you will be part of a broader community and have opportunities to:

• Take part in UA Give Back Volunteer Days to support local community initiatives
• Participate in sporting and social events
• Engage with our Teammate Resource Groups
• Celebrate key milestones!

• Enrolled in a Dutch college or university (Bachelor’s or Master’s) for the full duration of the internship (September 2026 – June 2027)
• Hold EU citizenship, or are a non‑EU student studying in the Netherlands
• Internship is a mandatory part of your curriculum
• Humble and hungry, with a strong willingness to learn

The Rookie Merch Planner will support the EMEA Merch Planning team in evolving core planning frameworks and analytics capabilities that underpin UA business strategy. The role plays a key part in strengthening how we define, track, and execute assortment and SKU targets across seasons, ensuring alignment to global strategy and enabling focus on the right product, in the right place.

Through hands‑on involvement in strategic target setting evolution and analytics dashboard development, the Rookie will contribute to improving decision quality, process efficiency, and data transparency. The role supports EMEA categories and works closely with Merch, Analytics, and other cross‑functional partners, strengthening planning alignment and decision‑making across the business.

• Support the evolution of the EMEA SKU target‑setting framework. This ensures that the product offerings align with sales analysis, market demands and the brand's strategic goals, leading to better customer satisfaction and increased sales.
• Contribute to the development and improvement of Merch Planning dashboards in collaboration with the cross‑functional team.
• Take ownership of recurring and ad‑hoc data preparation, checks, and trackers used in seasonal planning.
• Help streamline manual processes, improve data accuracy, and strengthen documentation.
• Enable the team to make better, faster planning decisions through improved data visibility and readiness.

We are looking for a curious, motivated early‑career talent with an interest in merchandising, planning, and analytics.

• Student of Economics, Business Administration, Supply Chain, Data Analytics, Data Science, Statistics, or a related field.
• Comfortable working with data and numbers; enjoys turning data into insights.
• Strong skills in Excel (advanced formulas, pivots); interest in automation is a plus.
• Exposure to data visualization tools (e.g. Tableau, Power BI) is an advantage, but not required.
• Structured, detail‑oriented, and comfortable documenting processes.
• Proactive mindset, eager to learn, and able to work collaboratively across teams.

• Work Schedule: This role follows a hybrid work schedule, requiring 4 days in-office per week.

No relocation provided

• Human Performance Institute (Gym) on site at the office
• 750 euro gross monthly allowance
• Health and Wellness allowance (50 euro net monthly) or Classpass membership
• NS Business Card
• Paid time off
• Paid “UA Give Back” Volunteer Days: Work alongside your team to support initiatives in your local community.
• Teammate Resource groups e.g. Green Machine, Sustainability, LGBTQIA+, Women in Leading and Living, Balance for mental health and wellbeing etc.

At Under Armour, we are committed to providing an environment of mutual respect where equal employment opportunities are available to all applicants and teammates without regard to race, color, religion or belief, sex, pregnancy (including childbirth, lactation and related medical conditions), national origin, age, physical and mental disability, marital status, sexual orientation, gender identity, gender expression, genetic information (including characteristics and testing), military and veteran status, family or paternal status and any other characteristic protected by applicable law. Under Armour seeks to recruit, develop and retain the most talented people representing a wide variety of backgrounds and perspectives. If a reasonable accommodation is needed to participate in the job application or interview process, please contact our Human Resources team via candidateaccommodations@underarmour.com.