Born and brought up in Tenerife, Spain, Siverio started his professional career with Las Palmas with the now HFC coach Manolo Marquez. He has since proven himself to be a natural goal scorer in the lower divisions in Spain, where he turned up for Racing Santander, breaking records and lifting them to promotion. Siverio was in search of a new adventure and joined the ISL in 2021 and in his first season at the club, he registered seven goals and an assist, making crucial contributions to the side that lifted the Indian Super League trophy.