A former female software engineer is suing Twitter for allegedly using a secretive promotion process that favors men. She filed her class-action lawsuit one day after an ex-employee of Facebook alleged that bad behavior including sexual harassment and race discrimination occurred in the workplace.

Women are less likely to ask for and receive promotions. Huang, the ex Twitter employee is urging women employees to come forward if they were denied a promotion in the last 5 years.

What does this say about companies and treatment of their female employees in the workplace?