The 35-year old two-time MLS Cup champion and four-time all-star is expected to provide plenty of depth in Dallas' keeping stocks and was grateful for the club for giving him a chance.
"I'm excited to be in Dallas. The organization really kind of stepped up at a time when rosters are virtually locked up, which says a lot about the coaches and the organization," Hartman said.
"My hopes are to come in, work hard, get some respect from my teammates and to try and win a championship."
Hartman said he was very keen on a move to Dallas when he started talking to the club and is glad things have worked out well.
"I think it was probably early last week that we started talking. Then, I received a call from the higher-ups with the new organization that they wanted to bring me in," Hartman added.
"They asked me if I was interested and I was absolutely interested. I think I was in such an awkward spot that if I had known in November that I wouldn't be with Kansas City any more, there are a lot more opportunity to look at the international transfer market and go look at a bunch of different things.
"But to be in February or early March looking for a club is not very convenient for anybody. So then, it just became a matter of trying to make the numbers work. It was going to be a multi-year deal. I understood that this year, I would take a hit but if I was able to prove my worth, I wanted to get back to where I was previously. That was one of the things that we worked out. It was mutually beneficial. I was able to get here on Sunday night and get my physicals done. It was able to be finalized yesterday afternoon."