In 2023, Mattijs Smits moderated a high-profile national debate on climate change, featuring prominent politicians and environmental activists. His moderation was praised for its balance and ability to facilitate meaningful dialogue on a critical issue.

Mattijs Smits launched a podcast series exploring the intersection of technology and society. The series features interviews with experts and thought leaders, offering listeners insights into how technological advancements are shaping the future.

In 2020, Mattijs Smits was awarded the prestigious De Tegel award for his investigative reporting on environmental issues. His work highlighted the impact of industrial pollution on local communities, leading to increased public awareness and policy discussions.

Mattijs Smits joined EenVandaag as a senior reporter, where he continues to cover a wide range of topics, including politics, social issues, and international affairs. His work at EenVandaag has been recognized for its depth and clarity.

In 2017, Mattijs Smits published a book analyzing the complexities of Dutch politics. The book was well-received for its thorough research and engaging narrative, providing readers with a deeper understanding of the political dynamics in the Netherlands.

Mattijs Smits led a significant investigation into healthcare fraud in the Netherlands, uncovering widespread misuse of funds by several healthcare providers. His reporting brought national attention to the issue and prompted policy changes to prevent future fraud.

In 2010, Mattijs Smits joined RTL Nieuws as a political correspondent. At RTL, he covered major political events and elections, providing in-depth analysis and reporting that helped shape public understanding of the Dutch political landscape.

Mattijs Smits began his journalism career at NOS, the Dutch public broadcasting organization, where he worked as a junior reporter. During his time at NOS, he gained valuable experience covering a wide range of topics, from local news to national politics.