The Aberdeen players have yet to be introduced to McInnes, who was appointed on Monday to take over from Brown a fortnight later. Brown is determined to lead Aberdeen into the top half of the Clydesdale Bank Premier League before stepping down and they need a victory to have any chance of getting there before their final match against Dundee United.
McInnes will be watching from the Pittodrie stand when Hearts visit and Vernon believes that can only help supplement the preparation of their current management team. The striker said: "We just get on with it, we've had the same gaffer in training and the same gaffer in next few games.
"We know the new man will be in the stand watching the games. It's quite a unique situation. But it's a good opportunity to impress him as well. Every club I've been at I've had new managers and it has always got the same reaction - lads are eager to impress. It's just a natural reaction. The extra pair of eyes will definitely do no harm.
"We'll get to meet him after the Dundee United game and get to know him more, which will be important for the squad. But right now the squad are being professional and getting on with the job.
"It has felt pretty normal. The day it was announced was a little bit of a shake-up. We weren't sure if we were meeting him (McInnes) or if he was taking over. The situation got clarified and it was back down to business. When we meet him, we meet him."
Brown had announced he was stepping down at the end of the season after a goalless draw with Motherwell left them struggling to make the top six. A 4-3 defeat at Celtic Park followed but other results went their way to leave them with a chance - and Vernon believes it is only right that Brown is the man with the opportunity.
"It's a sign of respect for the gaffer we have got at the moment," he said.
"He's a good man and everyone at the club knows that. He wants to carry out the job he set out to do. Hopefully we can send him off on a high. I think everyone can agree, Craig and Archie (Knox, Brown's assistant) have been brilliant for the club. They are two good guys that we want to do well for.
"We have been trying to do really well for them but unfortunately the results have not proven that. But there never has been a lack of effort from any of the players. We want to get the win and take it to the last game. If we can do that it will be an exciting end to the pre-split fixtures."