Do you really care whether someone has all the right knowledge on a given subject? I think that it is important to continue to gain knowledge. In my industry there are some that never let their employee’s go to class or other events because someone might steal that employee. I’m just the opposite – if they were looking and then left, they were looking anyway. So you need to figure out why they left.
I have always encouraged my employee’s to learn new stuff. One employee has his Qualifying Party license and he is excited that in just 6 months he can take his A.C.E. (Associate Certified Entomologist) test. I insist that each month they take an additional Continuing Education unit from a site like Univar and the best part is that it is FREE. Here in Arizona we are required to earn 6 CEU’s and in Florida where I also have a Certified Pest Control Operator Pest License I’m required to earn 2 for each category that I have and 2 for Core. On average I think I always have about 30 or so, you can earn them at places like Pestworld (which will be held in October 2013 in Phoenix) and other events sponsored by various groups throughout the year.