Telecom company Nokia is shaking up its top management. Federico Guillén, currently head of Network Infrastructure, will retire on December 31 and leave the management team on June 30. David Heard, currently chief strategy officer for Network Infrastructure and former CEO of Infinera, will take over as head of Network Infrastructure and join the management team on July 1.

Victoria Hanrahan will immediately take up the position of Chief of Staff to Nokia's CEO.