Darlington tomorrow begin a run of four successive Saturdays at Heritage Park and supporters have another new player to see in action.
The former Durham City defender has followed Ian Ward and Adam Mitchell to the club, with manager Martin Gray believing all three have ambition to go further in the game.
He said: "They want to challenge themselves and see how far they can go in football.
"They've got ambition and they're only going to improve, in my opinion, by playing with better players and in front of a lot of fans and with the pressure that comes with that.
"Footballers should have the mindset that they want to progress their careers and these lads have that."
Walker, Ward and Mitchell will feature tomorrow when Quakers face struggling Radcliffe Borough, one of five remaining league fixtures.
Walker played as a right-sided wing-back in Darlington's new 3-4-1-2 formation and has replaced Stephen Harrison, who has signed for Durham, though remains eligible for Quakers if required.
"Jack had a good debut," said Gray, who made five changes to his side last weekend from the XI which beat Wakefield 5-1 three days earlier.
. "The formation suited him because he's more an attacking player. He's very fit, very athletic and someone I've watched for a long time.
"Twice I've tried to sign him in the last 12 months and found it difficult, but that's three good additions to the squad for the final run-in.
"I rested Amar Purewal because he's put in so much work over the last couple of seasons and I've never been in a position to take him off.
"Now we're in a position to rest lads like Amar and David Dowson to keep them fresh so that they're ready to go again.
"I spoke to the ones that weren't playing, as always. It was purely a football decision, horses for courses.
"I looked at the pitch and it wasn't a place you could put Dale Hopson in the team and pass the ball through midfield because it would cause you problems.
"So we went for some power and some brawn and I thought we had a lot of that on the pitch.
"Dale had a good game against Wakefield, but every game is different. On Saturday we're at home and the team could change again."