Longtime Pirelli World Challenge boss Scott Bove is out as President and CEO of WC Vision, effective immediately, as part of a shakeup in series staff heading into the 2016 season.

Bove’s resignation was announced Sunday evening during the series’ end-of-year awards ceremony. Bove was not in attendance during this weekend’s championship-deciding event at Mazda Raceway Laguna Seca.

WC Vision has issued the following statement: “On Sunday Sept. 13, WC Vision voted to unanimously accept the resignation of Scott Bove as CEO.

“[VP General Manager] Greg Gill has been named interim CEO until a suitable CEO can be found.”

Bove, who joined WC Vision in 2009, led the series to new heights, most notably having played a part in the integration of FIA GT3-compliant machinery, which has resulted in significant growth in the GT class.

However, the championship’s rapid growth led to some teething pains this year, which included varying levels of unrest in the PWC paddock throughout the season while under the current series leadership.

While Gill takes temporary control of PWC, there appears to be a number of strong candidates in position for Bove’s replacement.

Of note, former IndyCar president of competition and operations Derrick Walker was at the Mazda Raceway Laguna Seca, and spent time as a guest of WC Vision.

Tony DiZinno contributed to this report