The former Scotland international was named Falkirk boss on Thursday, following Eddie May’s resignation.
“If I don’t keep Falkirk up I’ll consider it a failure,” he said in the Daily Record.
“But I have huge belief in the players, the staff here and in my own ability.
“We will stay in the SPL, no doubt about it.
“You can dress management up any way you like but winning games is the only way I can convince people that this will be different.
“There are a lot of different facets to this business – tactical, motivational, psychological – and although Eddie and I agreed on many things, we differed on others.
“So it will be different in the dressing room.”
He added: “I tried to convince Eddie not to go. But it’s up to us to secure SPL status now.
“I genuinely wouldn’t have taken it on if I didn’t think we could do it.”