Toronto, Canada – The Seahawks failed to make the playoffs this season. The 34-year-old franchise has yet to win a Super Bowl, losing to Pittsburgh in their only appearance in February 2006.
"I am so fired up to be here. This is a tremendous place to come to work," Carroll told a news conference.
"They (Seahawks management) have set this thing in motion in a manner that is almost dreamlike for me. I am so impressed with their vision and their outlook to the future and how they hope this organization can gain stature. It is exactly the way I envision it and I hope it all comes together in time," he said.
Carroll said he had improved and changed as a coach since his last time in the NFL.
"I come from a place where we had tremendous fortune and I was blessed to be at the University of Southern California for the years I was there.
"The things that we accomplished and the growth we experienced allowed me the opportunity grow as coach that makes me a very different guy to who I was a few years back.
"With the knowledge of that and experience of that, as this opportunity presented itself I just could not pass up the chance to come here, it is just an amazing opportunity," he said.
The coach said that his years with USC had made him accustomed to demanding expectations.
"It is hard to imagine that standards could be set so high - where you are only judged by perfection. I have embraced that and it has made me more clear about how we come to this opportunity.
"I hope we can do better than it has ever been done around here. There are extraordinary high expectations but I love living in that world - setting standards so high that maybe it doesn't seem feasible. That's OK with me,' he said.
"This is a big job, I will need a lot of help. We will enter into a search here to find a general manager in the next few days and in fact we will start this afternoon.
"The reason I have decided to come here is that I understand from the organization that I will be integrally involved in that and that is something that will give me the chance to be the best I can be," he said.
Seahawks CEO Tod Leiweke said that he was sure they had made the right choice of coach.
"Today we start a new era in Seahawks football. We start the rebuilding of our team with the hiring of one of the best coaches in all of America.
"We were able to get a guy that other teams tried to get and didn't."
(Reporting by Simon Evans in Miami; editing by Justin Palmer)