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Mari Barnhoorn

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Hi, I’m Mari Barnhoorn, a dual Dutch-South African professional based in Rotterdam, pursuing an MSc in Global Business & Sustainability at Erasmus University.

About

Hi, I’m Mari Barnhoorn, a dual Dutch-South African professional based in Rotterdam, pursuing an MSc in Global Business & Sustainability at Erasmus University. I combine hands-on ESG work with academic research, currently writing a thesis in collaboration with PwC’s human rights working group, focusing on how CSDDD and ESG legislation shape corporate practice.

Through roles at PwC and my involvement with STAR, I’ve built experience in sustainable finance, KPI reporting, CSR, and stakeholder engagement. I’m passionate about responsible business, human rights, and making sustainability actionable through pro bono projects and community programs, while continuously developing my cross-cultural communication and analytical skills.

  • 5 years' experience
  • Joined January 2026

Skills· 1

Languages

  • EnglishFluent
  • AfrikaansAdvanced
  • DutchBeginner
  • FrenchBeginner

Industry experience

  • Professional Services
  • Education
  • Non-Profit Organization

Work experience· 5 roles

ESG Corporate Sustainability Intern · PwC NetherlandsJan 2024 – Dec 2024 · 1 yr

Corporate sustainability intern in the ESG department, working specifically in PwC’s Community Program. Experience with pro bono work, KPI reporting, corporate social responsibility, consulting, and social work.

Sustainable Finance Intern · PwC NetherlandsJan 2024 – Jan 2025 · 1 yr 1 mo

Sustainable finance intern working in the ESG department, while writing thesis in collaboration with PwC's human rights working group. Experience with CSDDD, human rights, ESG legislation and proposal work.

Internal Officer · STARJan 2023 – Dec 2024 · 2 yrs

Internal officer for the internal affairs of the Global Business and Sustainability master programme within STAR, Europe’s largest study association. Experience with sustainable planning, itinerary building, financial budgeting.

Student Work · VARIOUSJan 2021 – Dec 2023 · 3 yrs
Work Placement · GENEVA MANAGEMENT GROUPJan 2017 – Jan 2018 · 1 yr 1 mo

Education

MSc Global Business & Sustainability · Erasmus University Rotterdam2023 – 2025
B Sc International Business – graduated with merit · University of Groningen2018 – 2021

Certifications and awards

Green Finance and Ethical Investment: Institutions and Standards2025 – 2026

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