I heard a sermon once (by an SSPX priest--many years ago, of course!) in which it was said, "If a woman says she has to wear pants to do a job, SHE SHOULDN'T BE DOING IT!"
If you're referring to a woman having to wear the style skirts, dresses, shoes, pantyhose that are modest, then I disagree. Think of the pioneer women, the many missionary sisters working in remote places in the times before Fatima. The types of work they did are largely not possible to perform in modern attire without gross immodesty. The women who lived before 1900 wore dresses and skirts and performed all sorts of work without immodesty or difficulty. The hemlines were long, skirts wide, bodices long sleeved and up to the neck line. There was no fear of leaning over to reveal one's cleavage. Stockings, bloomers and slips or under-dresses were worn beneath skirts. Over the clothing, many working women wore full or skirt covering aprons. Shoes were sensible; no spike or platform soles, no squished toes, no flip flops. IOW, women could do just about anything without giving scandal.
When I lived as an exchange student on a farm, I wore nothing but Amish-appearing clothes. I've done chores from house painting to stacking hay bales. There was no need for pants.
Certainly in an office, there is NO reason at all to offend Our Lord and scandalize others by donning male apparel!
I go tenting, hiking, and have climbed Mt. Washington and Mt. Katahdin while wearing a skirt. I had no problem.
There is really no excuse for those young women to dress as men in an office. What do they do? Lie on the floor to repair the copy machine? Stand on their desks to do.......? Women, even Trad women need to be educated