Knock on wood I don't have the job just yet, but I just got head hunted last week for a local job from a distant corp office.
My sitch is a bit different since I was consulting as a SAHD for the prior 8 yrs and just happened to be free and available.
So the point is, it COULD happen for you...
I'm on Monster and Linkdin and I know there's a few other pro networks that you might consider registering with. I got picked from Monster. Also, try temp agencies that deal with tech and executives. You might have to take a bit of a pay cut, but it could help you stay local and get your foot in a new door... maybe even a career shift...
I have seriously considered moving out of province and will if I have to, but I will remain where I am to keep the kids closer unless absolutely impossible. And for me, that means taking ANYTHING that can keep a paycheck coming and lets me take care of my kids...
As far as telling the ex, AFAIC it is none of her business. Well, mine is still a stbxW but never the less, it is none of her business, IMHO...
I understand it is financial so you feel you must tell her. And really, she'll probably find out anyhow. Still, your finances are now your business. The ONLY reason it should be her business is IF you are unable to maintain the 50/50 custody arrangement. Is there anything in the D decree that would suggest you need to tell her about a decrease in earnings?
Anyhow, again... my opinion is the only time I contact my W is in regards to custody arrangements that might need to be changed...
