Like most racers began Iaconelli his career in karting. In 2004 he moved to Formula racing and launched both in the Brazilian Formula Renault, where he finished fourth, as well as in the South American Formula 3, which he finished in fifth place in the overall standings. In 2005 he took part in six races in the Spanish Formula 3. In the overall classification Iaconelli, who started for the GTA team, 20th place was. He also started 2.0 Eurocup in some races in the Italian Formula Renault and Formula Renault. It also made the Brazilians for the Austrian team Interwetten.com his debut in the World Series by Renault.
In 2006, Iaconelli again at the World Series by Renault, where he for three teams - started, a total of twelve races in part - Euro International, Comtec Racing and Racing DG. He could not score points. He also started to elide in five races of the Spanish Formula 3, finishing in twelfth place in the overall standings. In the 2007 season Iaconelli was originally supposed to start again for Interwetten.com in the World Series by Renault. However, he was there replaced one month before the start of the season by the Russians Daniil Mowe. Therefore, the Brazilians moved to Pons Racing, finishing at the end of the season the 21th Place.
After Iaconelli 2008 already drove in the International Formula Master, he was obliged in June of BCN Competición for the current season of the GP2 series. He replaced the Serbs Miloš Pavlović. His teammate at BCN Competition was the Spaniard Adrián Vallés. His best finish was eleventh place in the sprint race in Valencia. Iaconelli scored no points and finished in 29th place in the overall standings. In October 2008, Iaconelli took for Durango at the first race weekend of the GP2 Asia Series season 2008/2009 in Shanghai part. 2009 started Iaconelli in the revived Formula 2 After starting with a second place in race well into the season, he was unable to continue this performance in the course of the season and finished the season in eleventh place in the overall standings. The last race weekend after missing the Brazilians because of a mild flu.
2010 Iaconelli was initially without cockpit and was of Durango for the Auto GP as a replacement for Giuseppe De Pasquale, who had suffered a wrist injury during the tests before the season, committed shortly before the first race of the 2010 season. In the second race at Imola, his first victory in Formula racing outside of South America he succeeded. With two more wins, he finished the season in seventh place overall. 2011 moved Iaconelli in the GT racing in the Blancpain Endurance Series.
- 2005: Spanish Formula 3 ( 20th place )
- 2006: Spanish Formula 3 ( 12th place)
- 2006: World Series by Renault
- 2007: World Series by Renault ( No. 21 )
- 2008: GP2 Series (No. 29)
- 2009: GP2 Asia Series (No. 30)
- 2009: Formula 2 ( # 11 )
- 2010: Auto GP ( 7th place)
- 2011: Blancpain Endurance Series