What is the ruling regarding a female engineer traveling to work a distance of 100 km or more, or a journey that takes four hours with a stay at the work rest area for one week, and is this considered a journey that necessitates the presence of a mahram?

The mentioned distance is considered a journey, and it is impermissible for a woman to travel without a mahram, according to the majority of scholars, except in cases of necessity. As for residing in another country, if it is safe, the presence of a mahram is not required. Therefore, do not travel without a mahram, unless the journey is absolutely necessary and you would incur harm by not undertaking it. In such a case, we hope it is permissible for you to act upon the opinion of some scholars who allow safe travel for a woman without a mahram, especially when accompanied by a group of women.