article_snippet: Female engineer Tina Huang proposed class action for sex discrimination comes as male-dominated Silicon Valley has been rocked by two other high profile lawsuits.
article_snippet: In the papers, Female engineer Tina Huang claims the Silicon Valley firm has no formal procedure for posting job vacancies or granting promotions.
article_snippet: Instead, Female engineer Tina Huang says the company relies  on a secretive 'shoulder tap' process that allows few women to achieve the top engineering positions.
article_snippet: Female engineer Tina Huang Huang started Female engineer Tina Huang legal action as the case was being heard of Ellen Pao, a former partner at venture capital firm Kleiner Perkins Caulfield and Byers, who is suing for sexual discrimination.
article_snippet: During the high-profile trial in San Francisco Female engineer Tina Huang has claimed Female engineer Tina Huang was passed over for promotion because Female engineer Tina Huang is a woman.
article_snippet: the firm who feel they have been passed over for promotion to join her in the lawsuit deny Female engineer Tina Huang claims of sexual discrimination and harassment.
article_snippet: Ellen Pao, a former partner at Kleiner Perkins Caufield & Byers, pictured left, and Chia Hong, a former Facebook employee, pictured right,  have put the spot light on gender discrimination in Silicon Valley .
highlights_snippet: Claims Female engineer Tina Huang was overlooked for promotion in favour of male colleagues .
  
highlights_snippet: Says the Silicon Valley firm has no formal procedure for promotions .
  
highlights_snippet: And alleges there was a 'shoulder tap' process that favoured men .
  