The Team Principal is the boss.

Responsible for the entire team from strategic direction, to design and development and fielding a car with a driver, and a well-oiled team to support it.

The team principal is usually seen seated on the pit wall or in the garage and while they have a team of engineers and strategists around them, the final call on team orders is theirs. 

Team principals are employees, but in some cases, they are also owners. 

Andrew Burden

The author Kiwi F1 Fan