Ogilvy’s CEO for its South and Western region offices, Michael Dobak, has left the agency to join blockchain platform BlockV as its chief marketing officer.

“Michael has been a classic client service leader of the Ogilvy brand,” said the Ogilvy Group CEO John Seifert. “His leadership on IBM, Samsung and our U.S. business in the West exemplified what we and our clients value most. We wish him the very best in his next chapter.”

It’s unclear when the agency will appoint Dobak’s successor.

Dobak presided over Ogilvy’s Atlanta, Los Angeles, San Fransisco, Sacramento and Denver offices in his role as CEO, South and West. He previously held positions as managing director, worldwide managing director, global brand management and global lead for IBM. Prior to joining Ogilvy in 2008, Dobak spent two years at Arnold, where he served as senior vice president, group account director, and where he helped win the Progressive Insurance account, launching the long-running Flo campaign.

“I have spent my career at Ogilvy partnering with brands to launch iconic and innovative communication ideas in partnership with ground breaking technology companies,” Dobak told Adweek. “I’m excited to join BlockV, a leader in the emerging blockchain sector, to help spearhead the next major shift in consumer engagement. BlockV represents the next ‘interface moment,’ bringing the power of blockchain to the masses and fundamentally changing the way brands build and maintain value-based relationships with consumers.”

Last year, Ogilvy unveiled its “USA 2.0” restructuring plan and Ogilvy USA CEO Lou Aversano subsequently named nine new “group leaders” in the U.S. Earlier this month the agency rebranded with a new visual identity and this week at Cannes it pledged to hire 20 women in senior creative leadership roles by the end of 2020.