Stepping on coworkers’ toes in order to move up is a method many employees try to take, but it is not recommended. Mostly because once you try to ‘sabotage’ other employees for your own benefit, it usually does not play in your favor. As mentioned above, being a team player is one of the most important things employees should do to prove their worth. If they are doing the exact opposite, they might not be ready for a step up at all, much like the coworker here.