The American is expected to make his debut on Saturday night (7pm) for the EIHL team in the new series at the Motorpoint Arena, Nottingham.
It's a baptism of fire as Sheffield are taking on home team Panthers, who many fans see as the club's biggest rivals.
But 32-year-old Muse, a relatively quiet man in the dressing room, will be up for the task and can lead by example, according to another Steeler debutant, Jérémy Beaudry.
The pair have been playing together for Rødovre Mighty Bulls in Denmark and Beaudry has a good handle on his pal's attributes.
"John is a big goalie who can make a difference every game he is in" said the defenceman.
"He makes the saves which keep his team in the game every night.
"He’s not the guy who will talk the most in the locker room, but he’s a really nice guy to have on a team."
Muse has played 184 games in the AHL, where he had a .914 save ratio.
Beaudry, 27, cannot wait to stamp his own authority on Steeler games.
He'll have the chance to do that over the next five weeks.
He describes himself as "a defenceman who loves to bring offence when it is possible.
"I like to skate with the puck, make plays and I think my shot is a good strength."
Beaudry won an award in the 2017-2018 season for his service to the community, although meeting the Steelers' fan base will be off limits during the covid-secured EIHL tournament.
But he said: "I’ve always liked to be involved in the community anywhere I’ve played.
"I think it’s important for players to take time with the fans. I’ve heard the fans in Sheffield are incredible and I’m looking forward to meeting them."
The player has arrived in Sheffield without his wife, who has been unable to join him because of work commitments.
He said he hadn't previously met any of his team-mates, other than Muse, but added: "I do know we have a team with a lot of good players who are going to Sheffield to win."
Beaudry, once a team-mate of ex Steeler Ryan Rupert, is one of 11 skaters who will be making their Steeler debuts in Nottingham.
After the Panthers' game, the team will return to Sheffield, only to head back again the following day for a 2pm face off against Manchester Storm.
It may be a gruelling experience for Tanner Eberle, who has not played any games since last season.
But coach Aaron Fox says the winger turned up for the week-long training camp in fine condition.