He is in with the bricks, knows his way around every nook and cranny of Ibrox after so many years as player, coach and now boss.
But the one thing he doesn't know anything about is the club's new power-broker, Charles Green. And that embryonic relationship may well be put to the test soon as Rangers continue to stumble around life in the lower echelons of the game.
Unquestionably, McCoist's iconic status in the eyes of the support, and his handling of the jaw-dropping demise that now has Rangers operating in Division Three, is buying him time right now. And he deserves that. But he needs to win football games. Bottom line.
No matter the club or the individual involved, there is always a tipping point in this game. Will it be the embarrassing 1-0 weekend defeat to Stirling Albion, the worst team in Scotland when they took to the field on Saturday, with their manager not even on the scene as he exchanged wedding vows?
Only time will tell on that, and McCoist's defiant rhetoric afterwards suggested he is determined to carry on with the job of somehow trying to get a group of players that can on one given night beat Motherwell at Ibrox, yet fail to win any of their four away games.
Ultimately, Green will make the call, and it would appear there won't be a move to remove the manager just yet.
But after Green's name emerged as the new saviour of Rangers back in May there were various suggestions from managers who had operated under him at Sheffield United that he would not be slow in reaching for the trigger if he was unhappy with what was happening in the managerial position.
The bottom line is that Rangers is an investment to Green. While the team is seriously under-performing on the pitch, and if truth be told some players need to take a right good look at themselves and realise that just signing for the club doesn't guarantee anything, the CEO has been travelling around the globe trying to convince supporters of his intentions and talking up the merits of a forthcoming share issue that he already has various experts working on.
But share issues are all about timing. You only need to ask Sir David Murray about that when he tried the last time to raise in excess of £50million from the fans, but found himself having to find the cash when there was such a low response, a sign of the unhappiness coursing through the support at aspects of his stewardship.
Would Green fancy his chances of raising a lot of cash when Rangers are making such a ham-fisted job of a mission that everyone expected them to coast? Highly unlikely.
Having been what he's been through since taking over from Walter Smith, I do believe Ally McCoist deserves a bit more time. But he has to be judged as Ally McCoist, manager of a team in the Third Division this season, and not what's gone on before.
This term, Rangers have lost at home to Queen of the South in the Ramsdens Cup, and they have won just three of seven outings in the league, with no wins from four away games. Several of the signings brought in over the summer are struggling big time and, ultimately, McCoist knows the buck stops with him. The rules are the same as they are for every other manager.
What rules Charles Green is playing by when it comes to his manager is now the big question...