Alber
In BA an AMS is an aircraft maintenance supervisor. An AMS is B1 or B2 licenced. There are LAEs, licenced aircraft engineers, again B1 or B2 licenced. Technicians are A licenced. Lastly BA has mechanics with no licence. Mechanics are either ex-apprentices or direct entry. The direct entry mechanics vary from people with experience and possibly licences to guys who have little or no engineering experience of any sort.
Just for clarification.