Lockhart served as press secretary to President Bill Clinton from 1998 to 2000. He faced the White House press corps during the Monica Lewinsky scandal and Elián González incident.
In a statement sent to Mashable, Facebook said:
“Joe’s arrival brings new skills and greater depth to our incredibly busy team. His experience building and running a press office at the White House gives him particular appreciation for the demands of a global 24-hour news cycle and the challenges of responding effectively to intense scrutiny.”