It's only been recently that I've realized what a huge difference your job can make when it comes to losing weight. I have a friend who used to nanny (like I do) and she lost quite a bit of weight in that time. Now she has an office job and has gained almost 10lbs back.
I feel very lucky to have a job that involves so much running around, taking kids on walks, dancing, etc. But a serious problem with my line of work is that I also spend a lot of time in the kitchen which makes me think of food constantly.
So how much of an impact does your job make? My mom sits 8 hours a day at her job BUT they also have a free gym in the building for employees. Another one of my friends has a pretty sedentary job, but they have a "bike to work" bonus incentive.