Hmmm....

[b][i]my complaint is that she always walking on the edge of the dress code. People from other departments complaint about it when they have visitors. It puts me in awkward situation. I tried to talk to her but she takes it defensively.[/b][/i]

Got it. FWIW, i gave you my 2 cents.

[b][i]The difference between bankers and constructions workers is that bankers come to the office in suits and construction workers come in jumpers.[/b][/i]

Oh, really? Do you have any clienteles from construction companies? Probably not...let me tell ya that they don't wear jumpers to everywhere.

[b][i]It’s very unprofessional to ware jumpers to deal with the bankers but it’s fine when you deal with construction workers. [/b][/i]

Try that to some construction workers, and see what their responses will be.