Barclays has announced that chief operations and technology officer Shaygan Kheradpir is to leave the banking group to join Juniper Networks as CEO.

The move is one of two senior staff resignations.

Kheradpir will depart to take on a new role at the US networking equipment firm starting on January 1, 2014. Head of compliance Sir Hector Sants is also set to exit the firm.

Kheradpir was promoted to chief operations and technology officer with responsibilities for the entire Barclays group in March 2013. He had previously been chief operating officer for the bank’s retail and business banking division, having joined the bank in 2011. In this role Kheradpir played a role in the development of the bank’s PingIt mobile payment solution, as well as the group-wide cost transformation project, Transform.

Barclays CIO Daryll West, who joined recently from rival Lloyds, will act as interim chief operations and technology following Kheradpir’s resignation.

Antony Jenkins, group chief executive commented: “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.”

Meanwhile Sants, who has served as head of compliance and government and regulatory relations, will also leave the firm, having been on sick leave since the beginning of October. The bank said that he had been suffering from “stress and exhaustion”, and had decided to resign.

Allen Meyer, head of compliance, corporate and investment Banking will cover his role on a temporary basis.

An internal and external search will now be launched for both posts.