What was Blaise Metreweli’s role in MI6 before becoming its head?

Before becoming head of MI6, Blaise Metreweli was known as Q, overseeing the development of spy technology. Before serving in that role, she worked as an agent in the field for decades, where she participated in and oversaw covert operations. She described her role, saying, “We get to do extraordinary things in the service of the country, but it’s really important that it looks ordinary.”