Born in
Chaves, Aguiar moved to
Canada at an early age, beginning his career in the
Canadian Soccer League where he represented local
Toronto Blizzard. Although the league disbanded in 1992, he remained with the team for their only season in the
American Professional Soccer League; additionally, he played organised
ice hockey at amateur level. Dubbed
RoboCop due to his powerful frame, Aguiar started competing in Europe in 1994, with Portuguese
Primeira Liga club
C.S. Marítimo. He had trouble making the lineups and subsequently dropped down to the
Segunda Liga where he spent four of the next five years, playing for
C.D. Nacional,
F.C. Maia and
S.C. Beira-Mar, helping the latter to
achieve promotion in 2000 and subsequently
stay in the top flight. Aguiar's good form was noticed by
S.L. Benfica, for whom he signed a six-month contract in December 2001, going on to play a somewhat important defensive role. On 25 January 2004, he scored the only goal in a 1–0 away win against
Vitória de Guimarães (in the
90th minute),
assisted by
Miklós Fehér who would die in the hospital hours later. He also helped the
Lisbon-based side claim the
2003–04 edition of the
Taça de Portugal, featuring 65 minutes of the 2–1
extra-time victory over
FC Porto in
the final. After his cup-winning exploits, Aguiar transferred to
Swedish club
Landskrona BoIS. However, an injury and his high wages ruined the move, and he left after only a few months for
F.C. Penafiel. In August 2005 he joined second-tier
Gondomar SC, representing it for four years and suffering relegation in
the last, after which he was released at age 37, retiring shortly after. On 13 November 2013, more than four years after his last match, Aguiar came out of retirement, moving to
Pedrouços A.C. in the
Porto regional divisions. ==International career==