Shaving for business during the Omer or The Three Weeks

Hi,

One who needs to shave for business, and who would lose money if he would not shave, may shave during the days of the Omer and during the first part of the "Three Weeks" period of mourning for the Beit haMikdash. However, he may not shave during the week of Tishah b'Av.

(Rav Moshe Feinstein, Igrot Moshe Orach Chaim 4:102)

Have a great day,
Mordechai