Niina Matikainen serves as the Chief Physician and Associate Professor in Endocrinology at Helsinki University Hospital and leads a research team at University of Helsinki, Finland. Her clinical expertise covers general endocrinology, lipid disorder and metabolic disease. She actively collaborates within Endo-ERN and engages with patient organizations.

In the field of endocrine research, she has maintained a long-term interest in diabetic and genetic dyslipidemia, postprandial lipoprotein kinetics and fatty liver disease. Additionally, her clinical research activities include endocrine research.

She has served as the Chair of the Finnish Endocrine Society and is involved as a member of many national and international committees.