After his high school studies, he enrolled in the faculty of medicine and was particularly interested in neurology and diseases of the nervous system; he was the author of numerous publications in this field and became chief physician and director of mental health services in the province of Ancona; he was also interested in the conditions of workers and was professor of Occupational Medicine in Urbino in his last years of life.

Enrolled in the ranks of the Christian Democracy, he was mayor of his hometown from 1960 to 1970, deputy from 1968 to 1994, from the fifth to the eleventh legislature of the Republic, Undersecretary for Labor, Health and Foreign Affairs, Minister of Labor during the Cossiga II government and the Forlani government.

In 1982, as undersecretary, he worked for the return to their homeland of the "desaparecidos" of Italian origin, weaving relationships with the leaders of the Argentine government, strongly linked to the circles of Freemasonry; according to some testimonies, these contacts were at the basis of his registration in the list of members of the Masonic lodge P2.

Foschi always proclaimed himself a stranger to the Masonic Lodge and defended himself by asserting that his name had been included in the list without his knowing anything.

He was also President of AWR, an international non-governmental scientific association based in Vaduz which enjoys consultative status towards the United Nations and the Council of Europe under the patronage of the Prince of Liechtenstein regarding the problems of refugees and migrant workers.