Bosses at Google consistently isolate and push out employees who speak out against it, a former manager at the company has claimed.

Claire Stapleton, 33, announced that she was leaving Google this week after 12 years following what she describes as “retaliation” for her role in organising a mass walkout in November.

The marketing manager at YouTube, which is owned by Google, played a key role in getting 20,000 employees around the world to walk out in response to how the company handles allegations of sexual assault.

It was after press revelations that Google had given a $90 million goodbye package to Andy Rubin, 56, the creator of Google’s Android mobile operating system, despite finding sexual misconduct allegations against him “credible”. He denies the allegations.