This makes her veep to Prince Harry, who is now president of the QCT, which helps support, fund and connect young leaders around the world who are working to improve their communities.
As a way of celebrating both International Women's Day and the prestigious appointment, the Duchess will join a panel of female thought leaders and activists to discuss issues now affecting women.
Meghan was joined by influential women including Annie Lennox, former Australian Prime Minister Julia Gillard, Adwoa Aboah, Chrisann Jarrett, and Angeline Muirmirwa to talk about women's issues.
This comes after the Duchess said yesterday that she avoids social media and newspapers so she does not get "muddled" by the noise. During her whistle-stop tour of Morocco, with Prince Harry by her side, she told a group of female executives and entrepreneurs: "Women have to challenge everywhere in the world".
In a lighter moment from an International Women's Day panel in London, the former Meghan Markle was asked how her pregnancy has been treating her.
"So for me, I think the idea of making the word feminism trendy, that doesn't make any sense to me personally, right?"
Meghan said: "If things are wrong and there is a lack of justice and an inequality, someone needs to say something - and why can't it be you?"
Pickerill's departure adds to a growing list of staffers who bolted after less than a year working for the Duchess of Sussex. "We have a responsibility as well, that if you're part of social media and engaging in that way, we're not just giving people more things to chat about but actually something to do".