In 2023, Sietske de Boer was honored with the Journalist van het Jaar award, recognizing her exceptional contributions to Dutch journalism. Her impactful reporting and dedication to uncovering the truth have made her a respected and influential figure in the media landscape.

In 2021, Sietske de Boer launched a groundbreaking investigative podcast series that delved into complex societal issues in the Netherlands. The series was praised for its engaging storytelling and thorough investigative work, attracting a wide audience and critical acclaim.

After her successful tenure in Brussels, Sietske de Boer returned to NRC's headquarters in Amsterdam in 2020. She resumed her role as a senior investigative journalist, focusing on national issues and continuing to contribute to major stories and analyses.

In 2018, Sietske de Boer was appointed as NRC's foreign correspondent in Brussels, Belgium. Her reporting focused on European Union affairs, providing in-depth coverage of EU policies and their implications for the Netherlands. Her work in Brussels was highly regarded for its clarity and insight.

In 2016, Sietske de Boer published a critically acclaimed book analyzing the Dutch political landscape. The book offered a detailed examination of the shifting dynamics within the country's political parties and was praised for its insightful commentary and thorough research.

Sietske de Boer was awarded the prestigious De Tegel award in 2015 for her outstanding investigative journalism. Her work on exposing corruption within local governments was recognized for its depth, accuracy, and impact, further establishing her as a leading figure in Dutch journalism.

In 2012, Sietske de Boer broke a major story on government surveillance practices in the Netherlands. Her investigative report revealed extensive monitoring of citizens' communications, sparking national debate and leading to parliamentary inquiries. This story solidified her reputation as a leading investigative journalist.

Sietske de Boer began her career at NRC in 2008, where she quickly established herself as a diligent and insightful reporter. Her early work focused on domestic issues, providing comprehensive coverage of political and social developments in the Netherlands.