Juniper Networks has appointed Shaygan Kheradpir as chief executive officer (CEO), effective from January 1, 2014.

Kheradpir succeeds Kevin Johnson, who in July announced his plan to retire as CEO. Johnson will remain as a member of the board.

Kheradpir joins Juniper Networks from Barclays PLC, where he served as the chief operations and technology officer, and as a member of its executive committee. Prior to joining Barclays, he was executive vice president and chief information and technology officer at Verizon Communications.

He holds a bachelor's, master's, and Ph.D. in electrical engineering from Cornell University.