The returns of Black Moon on its native position can lead the native to a profound rethinking of his/her values, belief system, and position in the world. These are key times in life during which the native can feel the push to engage in a completely different path and start a new life.
Black Moon in the 10th House
Great potential for originality and independence of mind, and the need to find a professional occupation where these may flourish.
Black Moon Lilith, by nature, does not like rigid establishment or anything that resembles patriarchal authority. In the house of career, this may lead to avoiding conventional forms of profession, and seeking for unusual activity. The native can become marginal. Even if he/she is not, there are likely to be times with a huge pull to be self employed, and also times of open conflict with one's boss. (Anyone with the Black Moon in this position will be well inspired to practise deep breathing for a few minutes before engaging in any kind of potentially-heated discussion with their boss.)
There is a deep potential for originality, which will blossom in creative occupations (where this originality can become an advantage, not a handicap). Black Moon in the 10th enhances the challenge of finding the right activity in life, the one in which you can blossom and fully express your individual nature.
Look for the transits of Black Moon on Black Moon as times when major changes of direction and professional occupation may occur. Because the Black Moon is related to the deepest emotional strata of the psyche, it is essential to keep one's emotional clarity during these periods, so as to make right choices and decisions.
reference http://lilith.tribe.net/thread/a8f93941-6d00-4ca9-93d1-9da000134c23