Born in Brescia, Italy, in 1951, he professed his first vows in 1971. Shortly after his ordination in 1978, he was assigned to the staff of the International Scholasticate in Rome. From 1984 until 1991, he was on the staff of the Oblate scholasticate in Kinshasa, Congo. Returning to Italy, he was a formator at the Italian scholasticate from 1991-96; he became superior of that scholasticate in 1996. He was named superior of the International Scholasticate in Rome in 2000. At the General Chapter of 2004, he was elected Second Assistant General with the portfolio of formation. The General Chapter of 2010 chose him for a first term as Vicar General. Fr. Archiati speaks Italian, French, English and Spanish.