[wrote a whole response to your question just to have the website dump all of it.
I'll try again]
PT92,
While not an expert, I'll take a stab at your questions. Of course, I stand ready to be corrected by any of the knowledgeable contributors on this website.
You mention more than 1500 hours and "commercial experience" but weren't specific enough to tell your story. Assuming you have the flight time required by FAR Part 61.159 here's what I think you might need to do:
Get authority to train in the USA
Get FAA First Class medical
Take the ATP-CTP course
Take the FAA ATP written
Get flight training to prepare for the check ride. What the training might be depends on what flying you've done previously. If you have experience in an airline airplane like B737 or A320, you'd want to go to a training organization and get the type rating /ATP in an airplane with which you're familiar. If your previous experience is in light airplanes, you'd go to some GA training company and get a few hours in a light twin then take the check ride in the airplane.
As for post-license job hunting, I don't know quite what to say about that. It hinges first on the legal ability to live/work in the USA...an area about which I know almost nothing.
Hiring in general seems to have slowed down a bit from its frantic pace of a couple of years ago but it's still happening. A reduction in hiring numbers likely means competitive requirements will have gone up.
I hope I haven't merely told you stuff you already know. Good luck and let us know what you decide to do.