Dorie Clarke, my favorite thinker, wrote, "Never say my good work should speak for itself. On one level, that sounds like humility. At another level, it's a form of moral arrogance. What you are saying is, ‘I'm above that. I don't have to sell myself. I don't have to promote myself. I'm better than that.’ Let me help you. No, you're not. You're not better than that. And when you think you're better than that, you've got a big problem.”
It seems harsh, and I wouldn't have put it that way, but you have to take credit for what you've accomplished and what you want to do in the future. There is nothing wrong with letting people know where you want to go in your careers. People are not a mind reader, and your silence can be detrimental to the people who can benefit from your skills.
Self-promotion is not wrong if you are doing it for the right reasons.
Mark Twain said, "There are basically two types of people. People who accomplish things, and people who claim to have accomplished things. The first group is less crowded."
Each of you is part of the first group, I know it, and everyone else should know it too.