Starbucks CEO Brian Niccol said on Friday the coffee giant will cut jobs to optimize its support teams as part of the company's ongoing turnaround efforts.

Starbucks said Friday it plans an unspecified number of layoffs as it restructures its corporate staff. In a letter to employees, Starbucks Chairman and CEO Brian Niccol said the Seattle coffee giant needs to ensure all work has a clear and accountable owner who can make decisions. The company also needs to reduce complexity and silos.

Starbucks said it expects to eliminate jobs, without affecting in-store teams, as part of its broader effort to operate more efficiently.

Our size and structure can slow us down, with too many layers, managers of small teams and roles focused primarily on coordinating work,” Niccol wrote.