The 24-year old has hit the ground running as Mark Warburton's men look to maintain their perfect start.
The former Wigan Athletic man joined in July and has already formed a promising partnership with Danny Wilson in the heart of the Gers’ defence.
Keirnan has been part of a Rangers side that have enjoyed a 100% start to the campaign, but the Northern Irishman feels the team has the type of characters to pick each other up once tougher times arrive.
“I’ve been in a few dressing rooms now and team spirit is a massive thing,” said the 24-year old.
“You get that from winning games and we’ll find out when things aren’t going well who our leaders are.
“I think that dressing room in there is a good one. There are good characters in there and good work ethic. Nobody hides."
It’s been a summer of upheaval at Ibrox but Kiernan feels everyone is pulling in the same direction and buying into Mark Warburton’s methods despite the changing environment, adding: “The gaffer has brought in some good players and the ones we had here already too and even the lads that aren’t playing have been great to have around.
“The gaffer has just drilled in to us from day one his standards and everyone has taken that on board and everyone is trying to impress every day.”
Rangers will be hoping to extend their faultless start to seven games when they take on Airdrieonians at the Excelsior Stadium tonight, and could hand exciting Arsenal loanee Gedion Zelalem his debut.
The arrival of the likes of Zelalem and Spurs youngster Nathan Oduwa, alongside more established pros like Kiernan, John Eustace and Andy Halliday, has brought a real balance to Warburton’s squad and ensured that the coming months will be an exciting time for the Ibrox club.