And although goals from Keith Fahey and Kevin Phillips ensured an instant return to the top flight for his side, speculation continues to circulate that he is set to leave following reported problems with the Birmingham board earlier in the campaign.
"This is not the time to talk about my future, it's a time for celebration," insisted McLeish.
"It's up there with the greatest achievements I've had in the game.
"It's massive financially to get into the Premier League and there are a lot of big teams in this league who can't get up there.
"It was massive pressure on us after blowing it against Preston.
"It was as hard a season as I have ever endured and there was the burden of promotion on us all season." Reading manager Steve Coppell was not overly disconsolate after the defeat ended his side's chances of securing automatic promotion.
The Royals have not won in eight games at home and will play Burnley in the play-offs.
But Coppell said: "I would describe myself as neutrally disappointed as before the game I wasn't expecting to go up.
"I'm not being wise after the event but I never thought we would go up this afternoon.
"It didn't turn out the way I thought, I must admit, but you look at the table and we're fourth. Where you finish is no accident.
"If we focused on all our missed opportunities this season we'd be crying into our beer for a long, long time.
"Over the last third of the season we've not been good enough and the table shows that.
"We gave away two terrible goals and you can't afford to do that. We only responded after going two down but that was too little too late."
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