Kurt Bowker has written a set of free wargames rules set in the Starship Troopers movie universe. I’m not sure where you would get the miniatures to go with these — perhaps Ground Zero Games has something that could be used.
Robert Heinlein
Starship Troopers For Dirtside
Here are some rules for using the Dirtside II system to recreate battles from Heinlein’s Starship Troopers.