Choose the right jobs for a long and prosperous career. This is a guest post by Rita Ashley. If you’d also like to guest post here on JobMob, follow these guest post guidelines. The Wall Street Journal reports, "40% of all executives leave their jobs within 18 months." And every one who does potentially causes serious long-term career damage. Employers believe people who stay in jobs 4+ years are better than those who move around. The first thing anyone who views a resume checks for is the pattern of longevity. You can offer all sorts of reasons for leaving but the fact is, any candidate with a sturdy work history aces those without.