In 2022, Janny Groen focused her reporting on the effects of climate change in the Netherlands. Her articles examined the environmental, economic, and social impacts of climate change, highlighting the urgent need for action and adaptation strategies in the face of global warming.

As the COVID-19 pandemic unfolded, Janny Groen reported extensively on its impact in the Netherlands. Her coverage included stories on the healthcare response, economic challenges, and the social implications of lockdowns, providing readers with a comprehensive view of the crisis.

In 2018, Janny Groen led an investigation into the failures of the Dutch healthcare system. Her series of articles exposed systemic issues and prompted discussions on healthcare reforms. The investigation was praised for its thorough research and impact on public policy.

During the European refugee crisis, Janny Groen provided extensive coverage from various hotspots across Europe. Her reports highlighted the human stories behind the headlines, offering a compassionate perspective on the plight of refugees and the challenges faced by host countries.

In 2010, Janny Groen was awarded the prestigious De Tegel award for her investigative reporting on social issues. This accolade recognized her commitment to uncovering stories that impact society and her ability to present complex issues in an accessible manner.

Janny Groen co-authored a book titled 'Women Warriors for Allah' which explored the radicalization of Muslim women in the Netherlands. The book was a critical success and contributed to the national conversation on extremism and integration.

In 2003, Janny Groen published a groundbreaking series on immigration in the Netherlands. Her work provided a nuanced view of the challenges faced by immigrants and the societal impacts of immigration policies. The series was widely acclaimed for its depth and sensitivity.

Janny Groen began her career at Trouw, a major Dutch newspaper, where she quickly established herself as a diligent reporter. Her early work focused on social issues, and she became known for her thorough investigative pieces that often highlighted underreported topics.