I guess my 2 cents are that no matter what you decide about your job you really need to 180 your position with your kids. Look very closely about how you can interact with them and be their dad. You need to be involved with their lives some how and some way. That is more important than anything else. You only have a short time in your life to be their dad. There are no second chances. They ultimately will define you.
My son only made eagle scout once in life. I can never go back and change that. I was there to push him and mentor him to do that. Not his mom. My job was also challenging as far as time was concerned. One of my W complaints is that I was never there enough for them however I know that w/o me my children would not be as successful as they are today. Now they don't want me in their day to day activities, we can talk by phone so the window of time is short in life. Believe me when I say this.
You have gotten some good suggestions on how to connect with them more. Even if you do nothing else take those suggestions and figure out how to influence you children to be the best that they can be.