What is the religiously permissible and correct action for a married couple in the event of the wife, an engineer, traveling to attend work conferences, especially if the husband views this as an absence from the marital home, and it may not always be necessary from his perspective?

A wife must be prevented from traveling to attend conferences if she is not accompanied by a mahram, due to the danger, intermingling, and forbidden unveiling involved. If her job requires this, she must leave it and dedicate herself to raising her children and taking care of her home. If she finds a permissible and suitable job that does not expose her to the forbidden, there is no harm, provided the husband gives permission, though it is preferable for her to stay at home.