This question should be addressed to the Court authority which appoints the judges.
No doubt many women have brilliant abilities even more than some men.
If your question is related to Islamic court, then we say that woman is allowed to work in all the procedure of the Islamic court except the final judgment. Final judgment which is for the (Qadhi) has a condition among many conditions that Qadhi must be man. Islam does not expose the woman to challenge and hardship of final judgment which is usually face opposition of one party.