not sure where to ask this?

my husband works for a company where there's only about 3 men and about 110 women. He has a doctorate degree and years of mangerial experience. When a position came available that he is experienced in he applied. This was in November 2010, he was the only person in the office to apply. He interviewed and about 2 months later was told the positon was on hold. Then in April 2011 one of the women in the office came and asked him a lot of questions about the position. He and she talked for awhile, then he heard she applied for the position and had an interview the next day. Suddenly the position wasn't on hold anymore, the regional manager (a woman) hired her immediately. Then in November 2011, two women left the company and two manager positions came available. He applied for one of them and interviewed, 2 weeks later both positions was filled with (yep you guessed it ...women). My husband asked one of the other men if he had applied for either position and the man (much younger than my husband) said, yes I did, but I'm the wrong sex. Also an email went out that congratulated one of the women for her promotion and one line said "the best WOMAN got the positiion." Does my husband have any recourse? or should he just let it go and hope the econonmy improves and he can walk?