Right. In AmE, it's considered an ordinary fact and the preterite is used: The secretary left.
In BrE and most of the Commonwealth (but not Canada, see AmE) the change of state is seen as the important point, and the present perfect is used: She has gone home.
Please note, if you say "the secretary is no longer" this means she has died. Not appropriate in most situations, outside a Monty Python video.
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