Operations started in 1946 in the charming town on the shores of Lake Maggiore, Arona, in the north of Italy, under the name of O.M.P. (Officina Meccanica di precisione - Precision Machine Shop), specialized in the production of mechanical precision parts.

For the Civil Aviation and Air Force segments the main customers were: Aeritalia, Agusta, Caproni Vizzola and SIAI Marchetti.
In the naval and military segments, DOM served in parallel: Cantieri Ansaldo, Marconi and Otomelara.
DOM was one of the first companies to be Certified in Italy for Aviation component.

DOM was a private company owned and operated by the De Ferrari family for three generations. It has been recently acquired by the italian industrial holding Ethica.