I got an office job at a University after I graduated, something to pay my bills while I sought fulfillment elsewhere. The plan was not always grad school, but it's definitely a job you transition out of in a year or two. My immediate co-workers know and a few others in my building do as well. I didn't keep it a secret but I didn't exactly broadcast it either. My boss knows that I plan to attend grad school in the fall, they knew when I took a day off to take the GRE in August, and they know I'm visiting a campus for a recruitment visit next month. They don't know however that I plan to quit at the end of May and spend my summer elsewhere. I'm waiting for that discussion until I officially accept an offer and put in my notice - which will probably be a month, or month and a half. I know this seems like a long time, but having had my job for almost 3 years I know how long it can take to get a competent temp and train them. I'm now the person on my team with the most institutional knowledge and frankly it's a little scary. I want them to be in good hands when I leave, but mostly to assuage a strange guilt I have at leaving - - though I owe them nothing. I think the reason I felt comfortable being mostly transparent about grad school is that my position is entry-level and sort of designed as a stepping stone, the field I work in is one I very obviously have no special interest in, and my team is very small and informal.