Microsoft announced it will revamp its sales and leadership teams following the departure of chief operating officer (COO) Kevin Turner, who leaves after 11 years at the company.

Turner, who quits to become CEO at trading firm Citadel Securities, is one of the company’s highest paid executives, according to Wall Street Journal, and was primarily responsible for sales of every product at the company.

In a public email addressed to Microsoft staff, Satya Nadella, CEO, said he will use the departure to “more deeply integrate sales into the rest of Microsoft and form one unified leadership team”.

To that end, Nadella appears to have divided Turner’s position among five employees, with Judson Althoff set to lead worldwide commercial business, Jean Philippe Courtoise heading up global sales, marketing and operations, while Chris Capossela will man worldwide marketing and the consumer business.

Kurt DelBene will head up IT and operations, as well as corporate strategy, and Amy Hood will be in charge of finance.

The company, it appears, will no longer have a COO.

Nadella said the changes reflect the fact that “the world is changing – and Microsoft must evolve with it and stay ahead”.

Last year, Nadella also shook up leadership at the company following the departures of four senior executives, including Stephen Elop, the former chief of Nokia.