Poster, you are lucky, and you presuppose that ALL frum girls are fotunate enough to have a frum boss who is equally sensitive to that issue. The reality is that most workplace environments are very different from that, and frum women have to learn how to accommodate their frumkeit to the environment and not vice versa. I am not chalilah suggesting they compromise their religious practices in any way. I AM saying, however, that they need how to PROPERLY carry on a pertinent and necessary conversation with men in their workplace, because it will usually be a part of the job deacription at some point and in some manner.
Many years ago I worked for a jewelry firm (whoa! it was SO long ago), and the majority of employees were Satmar chassidim. They were all very pleasant to me, though I clearly was not chassidic, and that included the men who were employed there. I am not saying they encourage personal conversations, but they had to show me how to do certain tasks, and check with me about the orders, sales, etc. so conversations were always part of my day with them. Though it was business for the most, part, it still caused “mingling.” Some of it was even chit chat. You cannot work with people day in and day out, and appear unfriendly. You just have to use seichel.