NEW YORK — Edelman has promoted Russell Dubner, head of its New York operation, to US president and CEO to oversee its $450 million US business across 14 offices, as former head Mark Hass leaves the company.

Dubner, who has run Edelman’s 800-person New York office since 2008, will take helm of US  operations at the start of Edelman’s new fiscal year on July 1. He’ll report to Matthew Harrington, global chief operating officer and join the firm’s executive committee.

Meanwhile, Hass is leaving the firm to pursue other opportunities. He had been Edelman’s US president since 2012 and prior to that was president of Edelman China for two years. He will stay onboard through the summer to assist with Dubner’s transition. Prior to joining Edelman, Hass had been CEO of MS&L and also founded his own firm.

“I am exploring ways to become involved in the New York advertising and marketing tech community, as either an investor or principal,” Hass told the Holmes Report.

Dubner, who joined Edelman as an account executive, said his leadership doesn’t signal a US strategy shift. Rather Edelman - which he calls “a boutique at scale” — will keep looking at the best ways to coordinate emerging and traditional services, as well as its overall talent structure.

In its last fiscal year, Edelman took in revenues of $707 million with organic growth up 11.6% from $636.8 million. Amid growth that outpaced industry averages, Edelman’s largest region — the US — saw organic growth of 9.7%, making up 60% of overall revenue.

Under Dubner’s six-year tenure at Edelman New York, the office grew 106% to $139 million, in part, because of rapid digital expansion. Edelman is in the process of looking for Dubner’s successor in the New York office whose clients include Samsung, Dannon, Energizer, Canon and AOL.

Dubner has also been involved in creating Edelman’s engagement tenet called the “Participation Platform” and developing thought leadership methodology; and the firm’s “master narrative” approach to corporate storytelling. He is also currently the chair of Edelman's global venture committee.

He’s also had stints at Edelman’s London office and led the firm’s global relationships with Samsung and Bombardier.