You have come to rely on this employee to handle to heavier workloads and to always go above and beyond. You know that any project you give this person will be done just as well, if not better, as you could have done. What would you do without them?  The truth is that might not be around forever. Here are a few signs that your rockstar employee is thinking about a career change. How do you keep your best employees right where you want them?  Share in the comment box below or on Facebook and  Twitter.