Unfortunately, women who wear at least some makeup are generally seen as more professional and polished than women who do not. Though in my opinion it matters less in a technical interview, it does help to wear lip gloss and powder at least. I know it’s not fair or right; I’m telling you what I see succeed and what many others who’ve done research on professional women have found.
Lip gloss, really? I know my biases differ from mainstream on makeup, but recommending lip gloss surprises me.

