Cone joins the firm after stepping down from her position as founder/chairman at Cone, now owned by Omnicom Group. At Edelman she will counsel clients on the development of corporate and brand citizenship, cause and public engagement strategies.
In 2007, PRWeek US called Cone 'arguably the most powerful and visible figure in the world of cause branding.' During her career at Cone, she developed such programmes as the Avon Breast Cancer Crusade, Western Union's Our World and Reebok's Human Rights initiative.
'In this new era of public engagement, clients look to us for counsel to activate brands around social purpose that will resonate in a stakeholder society,' said Edelman global CEO and president Richard Edelman in a statement.
'Carol has been a part of developing some of the most influential movements and causes at the intersection of business, brands and society. Her addition to the agency brings a powerful new dimension to our client service capabilities.'
In recent months, Edelman has invested in a series of senior additions to the firm's global leadership. In December, the agency hired social media expert David Armano as a senior VP in its Edelman Digital practice in the US. That appointment was followed by the UK hire of ex-BBC journalist Richard Sambrook as chief content officer in February.
Meanwhile, the agency also named former MS&L CEO Mark Hass to head its China operation, alongside new agency management in Japan and Australia.