Born on Thessaloniki, Greece, from a British-Spanish Trader Juan Marquiz and teacher Maria Paraskeva, he spend most of his childhood on Greece, Earth. His teenage years he was sent to a boarding school in Barcelona, Spain. He graduated the Earth Starfleet Academy and was assigned first as an Tactical Ensign on U.S.S. Legend where he served for 3 years. He, eventually, assumed command of the vessel, after the death of most of his crew and captain, by Klingon attacks, Upon his return to Earth, Starfleet entrusted him with the command of the vessel as captain and promoted him to Lieutenant. Upon his promotion to Lieutanant Commander and his assignment to command the U.S.S. Deimos he was assigned to the 101st Fleet under the command of Captain Thalio Narran. He now is a Vice Admiral of the Starfleet commanding the experimental U.S.S. Themis (NX-97977-Z [Vesta Class]). He is also the Fleet Chief Administration Officer for the 101st Fleet. His ship is currently assigned on Gama Orionis Sector Block.