After his stint as a foreign correspondent, Rob Koster returned to Het Parool, where he resumed his focus on investigative journalism. His return was marked by a series of impactful stories that continued to shape public discourse in Amsterdam and beyond.

Rob Koster moderated a high-profile debate on climate policy in Amsterdam, featuring key policymakers and environmental experts. His role as moderator highlighted his ability to facilitate complex discussions and engage audiences on pressing global issues.

Rob Koster was posted as a foreign correspondent in Berlin, Germany, where he covered major European political events and social issues. His reporting provided Dutch audiences with a deeper understanding of Germany's role in European affairs and its impact on the Netherlands.

Rob Koster published a book titled 'City Under Pressure', which explores the challenges and opportunities of urban development in Amsterdam. The book received critical acclaim for its thorough research and insightful analysis, further establishing Koster as an expert on urban issues.

Rob Koster was awarded the prestigious De Tegel award in the investigative journalism category for his work on the Amsterdam housing scandal. This recognition cemented his status as a leading investigative journalist in the Netherlands, known for his tenacity and commitment to uncovering the truth.

In 2010, Rob Koster led an investigation into a major housing scandal in Amsterdam, revealing corruption and mismanagement within the city's housing corporations. His reporting brought significant public attention to the issue and resulted in policy changes to improve transparency in housing management.

Rob Koster began his career at Het Parool, a major Dutch newspaper based in Amsterdam. He quickly established himself as a promising journalist, focusing on local news and urban development issues. His early work laid the foundation for his future investigative projects.