During Manchester United's pre-season Far East tour in 2001, he scored Team Singapore's only goal in their 1–8 defeat at the National Stadium on 24 July.

[10] He became the first local player to reach a milestone 100 domestic goals in Home United's 4–0 win over Balestier Khalsa on 21 June 2003[11][nb 1] Despite reported interest from Sheffield Wednesday and Ipswich Town in August 2003, a move to England did not materialise.

Along with teammate Sutee Suksomkit, he was sent for a 2-week training stint with Chelsea's reserve team in December 2003 as part of a deal with club sponsor Emirates Airline.

[12] In 2005, Indra rejected an offer of US$5,000 (S$8,520) per month from Malaysia Super League club Perak, choosing to extend his contract with Home United til the end of the 2008 season.

The Home United striker was then invited to join Real Salt Lake on their two weeks pre-season tour to Rosario, Argentina, beginning on 1 March, for three exhibition matches.

[16] Prior to the trip to Argentina Indra's friend, Dave Roberts, who helped arrange the trial was quoted to describe his chances of getting the contract as "very good", after his conversation with the club's general manager, Garth Lagerway.

[23][nb 1] After he was released by Singapore Armed Forces at the end of 2011, Indra signed with National Football League amateur side Keppel Monaco for the 2012 season.

Home United head coach Lee Lim-Saeng was however, soon convinced by his pre-season performances and "his intelligence on and off the ball" to sign him for a second spell with the Protectors in February 2012.

[29] Considered one of the best strikers to play for Singapore over the last decade,[30] Indra has a knack for finding the net in big games, scoring goals against higher-ranked nations like Uruguay and Japan.

Despite failing to strike up a partnership with Agu Casmir, he ended up scoring the opener in the home leg of the 2004 AFF Championship as Singapore won the tournament.

[32][33] While playing for the national team against Malaysia in May 2006, Indra suffered a knee injury which sidelined him for the rest of the league season.

Just hours before the kick off of the 2010 World Cup 2010 qualifier against Tajikistan on 9 November 2007, Aide Iskandar sensationally retired from international football.

His return to the national team was cut short four matches in when he suffered a leg break against Hong Kong on 10 September 2013.