It's important to be genuinely happy for others and their successes. Not only because it's the right thing to do but because it's good for your soul. Taking pride in other's accomplishments reflects your growth and maturity. Wishing people the best in their lives helps you become more happier in your own life and the feelings will be reciprocated (if you surround yourself with like minded people).
When you really want something, you're at your highest level of consciousness because what flows through you is of joy and happiness. It is not a yearning for things to change or for things to be different, but a feeling that this is what life is all about: being joyful and connected. Imagine all that you can imagine about your dream job and think about it with feelings of wonder and satisfaction. Allow your positive feelings to overtake you and your self-confidence to obtaining it explode.