After becoming involved in major labor racketeering and loansharking, DiNapoli went over to stocks and schemes during the mid 1980s, along with his brother Louis DiNapoli, a made man in the Genovese family. This involved setting up three front companies, which actually involved more than a dozen illegal contracts and shell companies, for the work in schools, hospitals and subways. This was a former operation between the brothers, to ease the relationship between the Lucchese and the Genovese crime families, since Louis DiNapoli was listed as a soldier for the Genovese crime family, and Joseph, as a caporegime for the Luccheses, during the early 1990s by federal prosecutors.