Valenciennes currently sit bottom of Ligue 1, but Jacobs feels that the team can retain their place in the French top tier if they all pull together.
"It's perilous. But I attach a lot of important to the squad," Jacobs told reporters. "You don't lose or win all alone.
"I'm going to rely on the staff and put in place what I did at La Louviere where we had a solid group and a good atmosphere. I'll attempt to put the puzzle together piece-by-piece. The question is how long it will take.
"The context is more one of hope than a negative one. We're not asking the team to challenge for the title or the Europa League. But I think they deserve a place higher up the table. It's up to us to change our position in the standings."
Valenciennes travel to Rennes for Jacobs's first match on Saturday.