 He and his brothers played leading roles in the community, and Felipe founded the local energy co-op and the sports and cultural centre.A Peronist activist, he became a councillor and the first mayor of Cutral-Có in 1952.Following the military coup d'etat and the banning of the Peronist movement, Sapag and his brothers, together with Carlos Sobisch, founded the Neuquino People's Movement, a provincial political party able to contest elections.