Ott Sarapuu has contributed to and led civil society organizations since his school days. He has been the president of the Estonian Student Union, one of the founders of the Union of Estonian Youth Associations and participated in several initiatives related to education.

For more than 10 years, Ott has had very deep contact with various museums. Under his leadership, the exhibitions of Seaplane Harbour, Tallinn TV Tower, Vabamu, Hiiumaa Wind Tower, E-Eesti presentation center and many other museums and exhibitions have been created. When improving museums, Ott thinks a lot about how to make them family friendly. 

Ott is active in the museum design and manufacturing company Motor and he also manages the Proto Discovery Factory.