A temporary assignment for a guy who went out of the fleet and became an Ambassador.
Assuming he did. He's not exactly the type, you know. Once he got over the bloodwine from the victory celebrations, what are the odds he actually went for the job Martok suggested he take? And what are the odds the Federation really offered the job to him?
That would be inconsistent with every officer known to be assigned to tactical besides Worf himself in TNG, the TNG films, DS9 and VOY, where tactical/security officers were always denoted by yellow.
Well, if you want to nitpick...
But to be sure, the guys who controlled the ship's weaponry were yellow in TOS, too - meaning red in TNG terms.
And we only ever saw three regulars at the Tactical stations of the assorted ships: Yar, Worf and Tuvok. The latter could have been double billet simply because there was no redshirt qualified for the job after the "Caretaker" casualties - none of the redshirt extras were senior to Tuvok, at least. The irregulars were all over the pallette: Picard had a redshirt at the Tactical station on his
Stargazer flashback bridge, Keogh's bridge had redshirts at the likely Tactical railing, but Picard put a yellowshirt at his Tactical in "Peak Performance" and "Descent" alike (in addition to placing a blueshirt in command!).
Which reminds me, Crusher's career path ranks pretty high in the oddness scale, too. Young MD rushes past more senior folk in getting CMO position on the Federation Flagship, then departs for heading Starfleet Medical (chief to the entire Starfleet division, at Commander rank?), then
gets back and gets stuck aboard that ship, and later her successor vessel, for a decade or so. Wait another decade, and she is commanding a ship of her own.
Timo Saloniemi