After six years in the back row at Ravenhill, Wilson took the big decision to move to England and join a Saints side that had only just re-emerged from the First Division. But since then there has been no looking back for the powerhouse No 8, who has become 'Mr Consistency' at Franklin's Gardens
"It's funny, I always massively wanted to play against Ulster when I came to Northampton and I thought, even as the Pool stages were going on, that for some reason we were going to be playing against them," said Wilson, in the Big Interview in the Saints' matchday magazine.
"As soon as the quarter-final draw was known I was really looking forward to the game - it should be a special weekend. I've already had a lot of people looking for tickets.
"They were texting and calling when they knew the draw. I'm sure they'll bring a lot of people over from Belfast and there will be some friends and family too.
"I'm really grateful for the start I got at Ulster and I enjoyed my time there. But I'd been at the club about six years and it just felt like the right time to move on.
"As a club, at the time, they weren't doing so well and there were a lot of people who weren't happy, feeling there was no ambition. To be fair, they seem to have sorted themselves out, but at that time it was an opportunity for me to get away and experience something new, which I had always wanted to do.
"I'm very comfortable where I am at the moment and I'm enjoying life in England because we are successful. I'm in no hurry to move anywhere at the moment."
Saints were Heineken Cup winners back in 2000 and picked up the Amlin Challenge Cup in 2009. That got them back into the Heineken Cup and they reached the quarter-finals last season.
But a trip to Thomond Park to face Munster, who they had beaten at home in the Pool stages, proved a bridge too far. Since then, though, they haven't lost a game in Europe, being the only side to win all six Pool matches this season - with Wilson appearing in all of them.
"We hope to have learned from last year, but we will have to see," he said.
"The Heineken Cup is always different than playing week-in-week-out in a competition like the Premiership. When it comes down to the knock-out games you are in pressure situations, rather than the slog of trying to grind out results.
"We experienced that pressure from Munster last year, so now we are used to the situation. When it comes this time we have to be able to deal with it better than last year and I think we can do that.
"We are a very ambitious as a club and we want to win every week. We had a tough few weeks with the internationals away, but when you lose those games it makes you want to put it right the week after."