By his mother, Mariotti is descended from Timoteo Ogando, who is considered a Dominican independence war hero against Haiti, and from the Dominican President Ulises Heureaux (Heureaux was Ogando’s son-in-law, and Mariotti’s great-great-grandfather).
Mariotti was Civil-Governor of Monte Plata from 1998 to 2000.
Mariotti is also President of the Italy-Dominican Republic Parliamentary Association.