Career
Mantila is best known for having directed the films, Pelon maantiede (2000) and In addition, she has appeared as an actress in Juho Kuosmanen"s film Taulukauppiaat (2010). Mantila"s first novel Varpunen was published in 2005.
She has also written and directed for Finnish radio.
In recent years, she has mostly worked as a producer and a consultant for a number of short subjects and documentaries. In 2011, Arts Council of Finland nominated Mantila as Artist Professor of Film Art for the period of 2012–2016.
Mantila has stated that her work as a director has helped her to get to know more of human nature. Through her work, she also aims to help people put their best foot forward.