Is it permissible for my father to work for a magazine that publishes pictures of women with uncovered hair under the pretext of them working in espionage, and is the money earned from this work permissible?

If your father's work involves a benefit for Islam and Muslims, and the objective can only be achieved by displaying pictures of living female spies who are actively engaged in espionage, then there is no harm in that to the extent of the necessity, and the work and salary would be lawful. He should have good intentions and dedicate the work to the benefit of Islam and exposing corrupt individuals. However, if the women have already died, then there is no benefit in the work, and he should leave it and seek another job.