Former Nokia CEO Stephen Elop and two other senior executives are leaving Microsoft Corp. as part of the technology company’s move to realign its senior leadership team.

Elop’s exit comes about a year after Microsoft (Nasdaq: MSFT) bought the cellphone and services division of Nokia for about $7.5 billion. He has been serving as the company’s executive vice president of devices and services.

“We are aligning our engineering efforts and capabilities to deliver on our strategy and, in particular, our three core ambitions,” said Satya Nadella, CEO of Microsoft. “This change will enable us to deliver better products and services that our customers love at a more rapid pace.”

The changes are the biggest made by Nadella since he was named CEO in early 2014.

  • In his own words: Why Nadella is making the changes

In an email to employees Wednesday, Microsoft said it is making the changes to help reinvent the company’s productivity and business processes, build an intelligent cloud platform that will power any application on any device and create more personal computing.

The company said veteran executives Kirill Tatarinov and Eric Rudder will also leave the company after a transition period.

In other changes, Microsoft said:

  • “Executive Vice President Terry Myerson will lead a newly formed team, Windows and Devices Group (WDG), focused on enabling more personal computing experiences powered by the Windows ecosystem. This new team combines the engineering efforts of the current Operating Systems Group and Microsoft Devices Group.
  • “Executive Vice President Scott Guthrie will continue to lead the Cloud and Enterprise (C+E) team focused on building the intelligent cloud platform that powers any application on any device. The C+E team will also focus on building high-value infrastructure and business services that are key to managing business processes, especially in the areas of data and analytics, security and management, and development tools. As a part of this announcement, the company will move the Dynamics development teams to the C+E team, enabling the company to accelerate ERP and CRM work and bring it into the mainstream C+E engineering and innovation efforts.
  • “Executive Vice President Qi Lu will continue to lead the Applications and Services Group (ASG) focused on reinventing productivity services for digital work that span all devices and appeal to the people who use technology at work and in their personal lives.”

Unrelated to the engineering restructuring changes, the company said Chief Insights Officer Mark Penn has decided to pursue another venture and will be leaving the company in September.