Is the prayer valid for someone who combines prayers before Maghrib due to the unavailability of a place for ablution and prayer at her mixed-gender workplace?

A Muslim woman must observe prayers at their prescribed times, and it is not permissible to delay them or combine them without a valid excuse. If the time for prayer is due at work, she must pray before its time expires. The entire earth is a masjid, and she should be careful to pray away from the sight of non-mahram men. If water is not available for ablution after searching, tayammum (dry ablution) should be performed instead. Some scholars permit combining prayers for a general need if the woman is harmed by praying during work hours and she cannot avoid it.