Barclays global chief operations and technology officer Shaygan Kheradpir has left the bank to become CEO at Juniper Networks after two years transforming its digital strategy.
Kheradpir was CTO at Verizon before joining Barclays in 2011, where he has been key to the bank's digital development, including its successful series of Pingit apps.
"The board has conducted a comprehensive search process and we are very excited to name Shaygan Kheradpir as our next chief executive officer," said Scott Kriens, chairman of the board at Juniper Networks.
"Juniper Networks delivers innovations that are transforming the way people interact, conduct business and connect as a global community,” said Kheradpir.
Barclays said current CIO Darryl West will act as interim chief operations and technology officer.
Barclays CEO Antony Jenkins said: “Shaygan has made a huge contribution to our innovation and technology agenda, and the elements of Transform which his team are delivering have real momentum.
"He has infused his colleagues in operations and technology with a spirit of creative thinking and exploration, which Barclays will continue to benefit from long after he has moved on."
Head of compliance and government and regulatory relations Sir Hector Sants has also resigned.
“Under both Hector and Shaygan, we have made great progress towards our goal of becoming the ‘go-to’ bank and I am totally confident that this momentum will continue with the strong leadership teams we have established in both functions,” added Jenkins.