However since arriving in the RaboDirect PRO12 back in 2007 after signing for Connacht, the back wouldn't have got much of a taste for the intense rivalry that the British Isles has to offer.
But all that changed last week as the 28-year-old was involved in his first clash against Edinburgh as a Warrior since making the move to the Firhill Stadium at the beginning of this campaign.
And what a game he was treated to, Ruaridh Jackson earning his side a point with a late try, only to then miss a penalty to leave the scores at 23-23 at Murrayfield.
The two sides head to Firhill to do it all over again on New Year's Day just six days later and Nathan is delighted about the quick turnaround, admitting his first experience left him wanting more.
"The draw with Edinburgh was a really tough game and I think the 23-23 draw was probably a good reflection of the game," he said.
"They got off to a really good early start and got a couple of early scores but that woke us up and although they won the first half I was really pleased with how we came back at them.
"It was a strange one though as we left the game thinking we could have one with how it ended so we definitely feel like we let them off so we want to show them in the next game.
"But at the same time we could have lost the game too so we have to be happy with the draw, especially with the game being at Murrayfield.
"We didn't take our opportunities to win the game but hopefully the home crowd at Firhill can spur us on to victory next time out.
"We can't wait six days to get another crack at them.
"It was my first taste of the derby game and the atmosphere was just awesome.
"Everyone was talking about it in the build up and when I walked into the changing room you could just feel the atmosphere and what it meant to the boys and the fans the way they were cheering.
"It was the best atmosphere I have experienced since moving to the UK and to think I get to do it all over again really quickly is brilliant."
Nathan has been a key component of a Glasgow side who are unbeaten in ten of their last 11 games, with just a 38-13 defeat at the hands of Leinster blemishing their record.
And Nathan is hoping team success can bring him individual rewards further down the line, with his time spent in Galway meaning he is eligible to play for Ireland.
"At the end of the tunnel there is a light flashing for me in terms of international rugby," he added.
"But I am just concentrating on playing week in week out for my club as I am such a team player and just want the team to do well.
"If you do that and the team does well then that is one of the bonuses that comes with that."
"I spoke to Declan Kidney before I went to Scotland and he wished me luck. I have not spoken to him since but we will just have to see what happens."
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