Paul Hastings' offices in New York. (Courtesy photo)

Joyce Xu, the head of Simpson Thacher & Bartlett's derivatives practice, has joined Paul Hastings as a partner in its securities and capital markets practice in New York.

Xu joined Simpson Thacher as counsel from Davis Polk & Wardwell in 2007, where she began her career as an associate nearly seven years before. In 2010, she became a partner in the Wall Street firm's corporate department and quickly established herself as a go-to lawyer for clients in the global derivatives market.