The machines themselves

 Well as chief mechanic..you get to play around with the cars quite a bit.
These cars are a race machines....They are built to go fast .
You will have all the set ups available to you via the factory or you can make up your own.
You can play around and set it up as you like using aerodynamics, suspension geometry, springs, damper settings and different grades of  tyres from soft to hard .

Once you get comfortable with  being able to drive the car around you get to change more settings .
Yep that's right more, you get to select shift points on the gear box the gear ratio that you run,
ride heights you want to run the car at, sway bars, shock damping hard -soft.
The F1's of model car racing also use 4WD, yep that's  right four wheel drive .
 

These machines are built to go!

Then when you get that close trim tabs on the body  help just that bit to fine tune the cars aerodynamics.
Like I said these things are like  the real F1 what ever you do to a full size car we do.

The managers choice hmmm,

 There are several classes of car available he will have  to  choose from.  

1/8th gas would be rated as the F1 or Indy cars these are 3.5cc unrestricted spec 4WD 2.5Kg rocket ships

1/10th Gas  200mm chassis, would be classed as the formula 3000  and are 2.5cc slightly restricted  1.7Kg rockets.

 And then we have 1/10th pull start which would be the best place to start and is considered the tourer class that will  help to refine the skills.