Rav aharon Lichtenstein at Gush says one should shave on Friday l’kavod Shabbos? Rav Solovetchik holds one can shave even every day if it would affect parnassah.
A lot of jobs require one to look well put-together and well-groomed. In America today, a scruffy unshared beard is a sign of being unkempt and is not professional. With that in mind, as well as Sam2’s point about davar ha’aveid in aveilus, l’chorah shaving is mutar.