I don't know what you're current level is, but: If you're brand new, offer to mentor a co-op. If you've been there for a while, take an active role in helping

I don't know what you're current level is, but: If you're brand new, offer to mentor a co-op. If you've been there for a while, take an active role in helping the newer people get up to speed. If you're enjoying doing that, tell your boss you'd like to have more opportunities to learn leadership skills.