After having worked at large companies and startups including founding a few of my own it is clear that job and financial security is about equal between the two. The last Fortune 100 company I worked for would cull thier workforce including whole teams often regardless of individual performance every March. If you had just happened to work on the wrong team for the wrong director too bad for you. All to often I saw dedicated people who had sacrificed years and long hours just get laid off seemingly out of nowhere. Directors seemed to have the worst longevity as when a VP was let go they often got rid of his or her management team as well.

The days of company loyalty are long gone. If you work at a large company and have been there over a year keep actively looking for the an even better position. You are expendable and therefore owe your employer nothing more than what you are paid to do today. I hate being so negative but sadly this seems to be the state of affairs these days