These seem to be the only possibilities for me Justin, due to
it relating to official activities, if it were not official I would use
some rather radical words related to control....

Something like organizing manager might work.

Scheduling manager might be too specific, although it sounds good.

Spanish term (edited): ordenador/a

You - or Ewe: see the first example sentence - know that this is another weasel-word. 'Authoris/zing office etc,' isn't very congruous in the context, but ordonnateur in FRE also has that as a routine translation.

Note that, in the USA, a marshal like an 'air marshal' has a policing function and- in the UK - a marshal means a law student or legal trainee clerking often for a Civil High, Appeal or Criminal Crown judge and 'marshalling' the latter's papers, plus doing case and other research.