Yes.  It doesn’t matter how long you have been conducting DOT breath alcohol tests.  Everyone must go through refresher training every 5 years – there are no exceptions or grandfathering.

About 90% of the students who attend our factory BAT courses state that they got at least 1 or 2 new pieces of information that they did not know or had forgotten since their last training.  Refreshing your knowledge is a good practice.