OK FAR 135.243...bear with me here,
"No certificate holder may use a person, nor may any person serve as pilot in command in passenger carrying operations----------------------------unless that person holds if required an appropriate type-rating.
FAR part 61.31(a) "Type ratings required":
A person who acts as PIC of any of the following aircraft must hold a type rating for that aircraft:
1.Large aircraft (except lighter-than-air)
2.TURBO-JET POWERED airplanes !!!
3.Other aircraft specified by the administrator.
So you'll need a type rating on whatever Lear you'll be flying.
Guess that's not part of the program and since when do the fly Lears on these kinds of operations VFR?
That's more for 135 ops in places like Alaska where's there is a very limited amount of airports with instrument approaches.
For the record thought the guy was Dutch, their contact info was in Holland (2 years ago).