Benfica Born in
Lisbon, Aguiar grew in local
Benfica's youth system, but spent the vast majority of his spell as a senior with
their reserves. Additionally, he also served two loans, at
Gil Vicente – six months – and
Alverca, helping the former
farm team return to the
Primeira Liga in
the second of his two full seasons, after which he returned to his
alma mater. Under
Giovanni Trapattoni, hired for the
2004–05 campaign, Aguiar would make all of his appearances for Benfica's main squad, his first being a
UEFA Champions League third qualifying round against
Anderlecht on 10 August 2004 (
1–0 home win, 3–1 aggregate loss). He also contributed with 19 matches (840 minutes) as they won the domestic league for the first time since 1994; after the Italian was replaced by
Ronald Koeman, however, he fell out of favour and was released from contract.
Heart of Midlothian In January 2006, Aguiar signed for
FBK Kaunas, who immediately loaned him to
Heart of Midlothian, both clubs being owned by
Vladimir Romanov. He made his competitive debut in a 1–2 defeat to
Aberdeen in February, and made a further 11 appearances before the end of
the season, helping the side finish in second place in the
Scottish Premier League and
adding the
Scottish Cup.
2006–07 did not start so well for Aguiar, as he was
sent off in the first leg of Hearts'
Champions League third round qualifier against
AEK Athens, after receiving a second yellow card for throwing the ball away with a 1–0 lead – the Greek utilised their subsequent one-man advantage to win it 2–1. A lengthy eighteen-month injury layoff soon followed for the player, and he made his return to first-team action in October 2008, in the
Edinburgh Derby where he scored a free-kick to earn his team a draw; on 9 December he was awarded the Clydesdale Bank Premier League Player of the Month award for the previous month, and ended the
2008–09 season as top scorer in the squad with seven goals. On 1 June 2009, Hearts confirmed Aguiar's departure following the expiration of his contract, leaving him free to sign with another club. He stated that he had enjoyed his time at the
Tynecastle Stadium, with the
Scottish Cup victory and second-place finish in the league in 2006 being personal highlights, as well as wishing them the best for the future.
Omonia A
free agent, Aguiar signed for
Omonia from Cyprus in June 2009. He left five years later at the age of 33 after helping the
Nicosia club to five major titles, including the
2009–10 edition of the
Cypriot First Division championship where he appeared in 15 games, scoring once; he subsequently returned to his homeland, and joined
Clube Oriental de Lisboa. In November 2016, shortly after his last team's
relegation from the
Segunda Liga, Aguiar announced his retirement. ==International career==