1) Our team of nationally recognized trainers has earned multiple titles….
In the first version team is the object making has correct.
Or
2) Our team of nationally recognized trainers have earned multiple titles….
In the second version trainers is the object making have correct.
Our team of nationally recognized trainers who have earned multiple titles.... If we think for 1st version in this manner, it becomes:Our team of nationally recognized trainers which has earned multiple titles...makes it more readable, I think. – Nitinkumar Ambekar Sep 09 '15 at 11:14