Brian Barnhart, IndyCar's embattled competition president, has been asked to leave his position according to reports in the US media.
Reports from SPEED suggest that Barnhart has been removed from his current role and will no longer be involved in the management or officiating of races, although he will be kept on the IndyCar payroll.
Barnhart drew wide and sometimes vociferous criticism during the 2011 season, peaking during a chaotic New Hampshire race when he made the decision to restart the race in wet conditions when the cars were still fitted with slicks.
He later took full responsibility for the incident and was defended by IndyCar CEO Randy Bernard, who said he was "100 per cent supportive" of his president of race operations.
In addition, commercial president Terry Angstadt is understood to have been removed and replaced by Mark Koretzky, who served as IndyCar's business development director in 2011.
Angstadt has held his position since 2007. he and Barnhart are the final two remaining links to Tony George's Indy Racing League.
Potential replacements for Barnhart include American Le Mans Series race director Beaux Barfield, former CART driver Scott Pruett and longtime CART team owner Steve Horne.