The Ogilvy Group has terminated the employment of its chief creative officer, Tham Khai Meng, after an investigation into his behavior following employee complaints, according to a memo sent to staff Wednesday by CEO John Seifert.

Meng, who’d held the CCO role at the WPP-owned agency since 2009, was terminated after a two-week internal investigation by senior management

“I found these complaints serious enough to appoint external legal counsel to investigate the matter,” Seifert said. “After carefully reviewing the investigation’s findings with several of my partners, we concluded that Khai’s behavior was a clear breach of our company values and code of conduct. I have decided to terminate Khai’s employment with the company with immediate effect.

Each year, we ask every employee in the company to read, authorize, and fully commit to a code of conduct that each of us is responsible for living up to. Over the past 70 years, we have institutionalized shared values and a standard of professional behavior unique to the Ogilvy brand’’

Seifert added: “This is an important moment to reaffirm that no individual in this company is too senior or too important not to be held accountable for their actions.”