Farbrace, who was an integral influence as England’s assistant coach under Trevor Bayliss from 2015 to 2019, was also Sri Lanka’s head coach when they won the World T20 in 2014.
“I’m delighted to be joining Sussex and I’m really looking forward to helping everyone at the club to achieve their ambitions,” Farbrace said.
“It is a fantastic club that has produced many fantastic players for both Sussex and England. I am really looking forward to the opportunity of working with the players and coaches to drive the performance of the team forward.
“We should be very focused on developing our own players, as well as developing players to play for England at all levels, but also winning trophies for the members and the club.”
Speaking on the appointment, Rob Andrew, Sussex’s CEO, said: “We are all delighted Paul has agreed to join the club. His all-round experience is exactly what we have been looking for when we made the decision to return to one Head Coach across all formats and I am confident he will enable our team to fulfil its full potential.
“He shares the club’s ambitions to produce our own players, develop players for England and win trophies for Sussex. We have a very exciting few years ahead as we see the young talented players develop further in Sussex colours.”