Jealousy always comes from something internally. You are not really jealous at that person, you are jealous of something they possess or lack thereof. First we need to identify what is making us jealous and why and work on that thing indefinitely until we extract if out of our personality. This can be through books on the subject or audios, etc. When you clear out jealousy in your life through self development, you will notice that other events unrelated to work jealousy will come up in your life and you will automatically feel less emotion/jealousy to those situations. Fix one area of the psyche, or better one, and the other related issues become less significant, leading to overall growth of the individual.
Contributors: Chris Cucchiara from Personaldevelopfit