Simon Trummer will return to Hilmer this weekend having made a one-off appearance with the team in Austria earlier this year.
Trummer is replacing Nick Yelloly who has occupied the #24 Hilmer car since the second event of the season in Spain back in May.
The Swiss driver finished outside in both races he previously competed in this season.
His other racing exploits this season include the FIA World Endurance Championship with Team ByKolles.
Trummer’s team mate for this Monza weekend is yet to be revealed but last time out in Belgium the team only ran one car.