As , Mullen moves to Hunter Stadium a day after mutually agreeing to part ways with the Wanderers.
The 25 year-old hopes to make an impact at the embattled Jets, who recently sacked five senior players and saw three members of the coaching staff leave.
“For me I am looking at this as a great experience,” said Mullen, who has inked a deal for the remainder of the season.
“I had a good time at Western Sydney Wanderers where I enjoyed a lot of success in winning the ACL with the team. But it’s time to move on and I see Newcastle as a place that I can help the team move forward.
“I will definitely be looking to show leadership skills during my time with the Jets. I do think I have quite a bit of experience in the [Hyundai] A-League, so I am looking to be a leader on and off the field.
“First and foremost I want to be a positive influence on the team. I am a fresh face coming in so I am looking forward to bringing in all the positivity that I have shown at my past clubs.
“If I can play the majority of games and perform consistently for the team I will be happy on a personal level, but it’s important that we give back to the fans that have shown so much support to the Club, too.”.
Newcastle coach Phil Stubbins was pleased to reconnect with a player he previously worked with at Adelaide United.
"Daniel is someone I know well from Adelaide, I was involved in giving him his promotion to the first team and he came in and had a really good impact on the team," Stubbins said.
"I know the kid, he comes from a good family, I respect his father Joe as a real football person and I am pleased to be able to bring Daniel to the Jets.
"I am pleased Daniel wants to be part of taking this club forward and this initial contract will allow us to have a good look at him over the coming 12 games."
Mullen trained with his new team-mates for the first time on Friday and will be in contention for the Jets' next match against Brisbane Roar on Friday night at Hunter Stadium.
