John McMahon will stay at Shrewsbury Town

McMahon was assistant to former Town manager Gary Peters but was placed in charge of first-team duties after Peters left the club last week.

"We haven't discussed titles, but as far as I'm concerned it will be in the same capacity," the 58-year-old told BBC Radio Shropshire.

"It's my job to assist Paul now in everything we can do to get results."

He added: "I was pleased to be invited to stay as part of the staff at the club."

In McMahon's two games in charge, Town managed a 1-1 draw against Rotherham United and a 0-0 draw against high-flying Darlington at Oteley Road.

Simpson's first game in charge will be at Macclesfield on Saturday.