Brian Lesser is a businessman who is the CEO of Xandr, the advertising branch of AT&T.

In 2006, Lesser was vice president of 24/7 Media, then senior vice president of the Media Innovation Group, LLC (known as “The MIG”). In 2011, he founded Xaxis as a subsidiary of GroupM; he then became CEO of GroupM in November 2015, overseeing six media agencies.

In October 2017, Lesser was recruited by former GroupM client AT&T as CEO of Advertising and Analytics. In September 2018, Advertising and Analytics was renamed Xandr, and Lesser was appointed CEO.

In 2014, Lesser was named to the Advertising Age 40 Under 40 list and, in 2018, was recognized by AdWeek as Executive of the Year.

Lesser was introduced to the advertising industry at an early age by his father, Michael S. "Mike" Lesser, who was chairman and CEO of Lowe Marschalk (later Lowe & Partners Inc.), then president of Ogilvy & Mather New York.

Lesser received a bachelor's degree in Political Science from the University of Pennsylvania in 1996, then earned an MBA from Columbia Business School in 2004. He resides in New Jersey with his family.

Business, Business Leadership, Marketing, Advertising, CEO, Chief Executive Officer (CEO), Leadership