Hassle has been working with social entrepreneurship, corporate social responsibility (CSR), and brand management since 1986.
In 1989, Hassle, together with former head of the department of culture in Rättvik, Åsa Nyman, and former CEO of Draggängarnas limestone quarry, Margareta Dellefors, established the first working group for the development of outdoor area Dalhalla in Rättvik [REF].