Shiels – along with all of the team – has improved since McCall’s arrival in March and he hopes that winning over the two legs against Motherwell can mean a longer stay for his boss.
The Northern Ireland international has played a prominent role under McCall and even played through illness to help Rangers on their way to the play-off final, and he thinks that most managers would have struggled to turn the Gers around.
Speaking ahead of Thursday night’s game at Ibrox, Shiels explained what a massive job McCall had on his hands when he arrived and how well he has done at changing the fortunes of the team.
I don't think there are many managers who could have lifted us from where we were, how low we were, in the style we've done it,” he said.
"You could physically see how bad things were at one stage. You could rhyme off a few games that really should have happened, like losing 4-0 to Hibs.
"We did need picking up at that stage and I think a lot of credit has to go to the manager and the staff for doing that."
Shiels admits through the dark times he was aware of people questioning if the team would even make the play-offs, but he attributes a lot of the success to McCall and his management team.
It is likely Shiels will take his place in the Rangers midfield on Thursday night in front of a sold-out Ibrox with the opportunity to make it advantage Rangers going into the second leg at Fir Park on Sunday.