He was the chairman and chief executive officer of Millennial Media (NYSE:MM), a company he co-founded in 2006 with Chris Brandenburg, until his resignation in January 2014.

[citation needed] Following his graduation, Palmieri spent 15 years working as a business development and telecom executive at companies including Sprint and Verizon Wireless.

[citation needed] Palmieri co-founded Millennial Media in May 2006, and in his position as president and CEO, led the company's growth into an independent mobile advertising platform.

[citation needed] In March 2012, Millennial Media became a publicly traded company and its common stock is now listed on the NYSE under the ticker symbol MM.

[2] Palmieri is the global vice chairman of the Mobile Marketing Association[3] and a member of the board of directors at the Interactive Advertising Bureau (IAB).