La formation sera donnée aussi bien

La formation sera donnée aussi bien aux nouvelles recrues, de manière préalable au début de leur activité, qu’au personnel déjà en service.

Results (English) 1:

The training will be given to new recruits, both in a preliminary manner at the beginning of their activity, personnel already in service.

Results (English) 2:

Training will be provided to both new recruits prior manner at the beginning of their activity, that already in service personnel.

Results (English) 3:

the training will be given to new recruits, prior to the beginning of the activity, the staff already in service.