This definition appears somewhat frequently
See other definitions of FAE
Samples in periodicals archive:
: Vacancy Title : Field Applications Engineers.
Which name is most apt can even depend on which industry it is used in.  Some common job titles that involve the essence of sales engineering include Sales Engineer, Systems Engineer, Customer Engineer, (pre-sales) consultant, Technical Account Manager; Applications Engineer or Field Applications Engineer, and others. The term systems engineering has various shades of meaning, however, as it is often more or less synonymous with industrial engineering; but in any market economy, industrial engineers will often end up providing some sales engineering as a necessary portion of their work.