Yingluck Shinawatra began her career as a sales and marketing intern in 1993 at Shinawatra Directories, a telephone directory business founded by AT&T International. She later became the director of procurement and the director of operations. In 1994, she became the general manager of Rainbow Media, a subsidiary of International Broadcasting Corporation. She left as Deputy CEO of IBC in 2002, and became the CEO of Advanced Info Service (AIS), Thailand’s largest mobile phone operator. After the sale of Shin Corporation Yingluck resigned from AIS, but remained Managing Director of SC Asset Co Ltd. She was investigated by Thailand’s Securities and Exchange Commission regarding possible insider trading but no charges were filed.