Hjelde had hinted he was going to return to his homeland Norway during this summer.
However, Shirtliff speaking to the Mansfield CHAD said "Jon is away in Norway right now visiting relatives.
"I know he has said in the past that he may pack the game in at the end of this season. But I have told him I think he is too young at 33 and reminded him you only get one career.
"I am hopeful he will decide to have another season with us.
"He missed a lot of pre-season last year and I think that affected him at the start of the season.
"But once he got in a run of form I thought he formed good partnerships with both Alex John-Baptiste and Jake Buxton."