Mark Ernst, the former chairman and CEO of H&R Block who went on to become deputy commissioner for operations support at the Internal Revenue Service, will be leaving the IRS later this year, according to an announcement Thursday by IRS Commissioner Doug Shulman.

Ernst joined the IRS last year after having been chairman and CEO of H&R Block from 1998 to 2007. He left Block to head the venture capital firm Bellevue Capital for two years before joining the IRS.

“Mark has been a most valued, respected and dedicated member of my leadership team, and he brought a unique perspective and focus to some of our most important initiatives, such as technology modernization, cybersecurity, financial management and workforce issues,” said Shulman. “I want to thank him for his strong contributions to the nation’s tax system, and he will be deeply missed by all of those who had the opportunity to work with him.”

Shulman noted that Ernst plans to return to the private sector. Succeeding him as deputy commissioner for operations support will be Beth Tucker, who currently serves as deputy commissioner for support in the IRS’s Wage & Income division.