Brigadier Ben Wrench has taken over as operational commander of the 51st Infantry Brigade and Headquarters Scotland, with the moment marked by Edinburgh Castle's historic One O'Clock Gun.
He takes over from Brigadier Robin Lindsay, who has held the post for the last three years and has overseen the service's involvement in the coronavirus effort.
Brig Wrench previously served as Commanding Officer of 1 SCOTS when they were based in Scotland's capital.
The new commander says he is "absolutely looking forward" to his new role.
"Obviously I've got to get to grips with and get to know my staff at the headquarters and also all the supporting units, be those under the operational command or also under operational control, of which there are many.
"And then listening to them and finding out how I can serve them, because [leadership's] all about... giving them the service they deserve."
Outgoing Commander Brigadier Robin Lindsay said he was thankful to have held the position.
"It's been a great three years working with some fantastic people up here in Scotland, doing a job that really matters.
"So it's been really enjoyable, really satisfying and so, inevitably, [I'm] sad to leave."