Dressing the Part: The Evolving Style of Silicon Valley Executives Dressing down is so played out, said Andrew Weitz, a Los Angeles based executive style consultant who has worked with tech leaders, though not the ones mentioned in this article. Hoodies, a tired clich. Silicon Valley Man Style Paul Gallo Q&A Northern California Style Recovering from racqetball incident highly casual attire + knee scooter = new dress code for Silicon Valley CEOs. Silicon Valley Fashion Week: Not Chic or Geek What is business casual: How to look sharp at work GQ India