English to Dutch Bus/Financial Business/Commerce (general) concurrentie

I want to thank XXX for his continuous commitment and engagement during the period of running this function in an *acting capacity*.
XXX wordt uiteindelijk officieel in deze functie benoemd.
Ik heb over 'acting' en 'interim' o.a. het volgende gevonden:
the modifier "acting" applies when the executive post is filled on a permanent basis, yet the permanent appointee is unavailable, e.g. because of extended travel, sabbatical leave, or illness. The modifier "interim" is used when the executive post is vacant. In other words, an acting officer serves in the absence of a permanent appointee, but an interim officer serves through a period between permanent appointees.
posted by dcjd at 2:07 PM on August 6, 2007

In my univ. experience, 'interim' means the person is not a candidate for the permanent position (though occasionally such a person ends up there anyway). 'Acting' is a bit less clear, but leaves the possibility open that the individual would end up keeping the position on a regular basis.
De laatste optie is hier dus van toepassing, maar hoe wordt dat in NL vertaald. Is 'plaatsvervangend' hier de juiste vertaling?