About Joanna O'Connell

Joanna joins MediaMath from AdExchanger where she was the founding member of the AdExchanger Research practice, developing syndicated primary research in the areas of programmatic advertising and audience targeting, and serving as an expert partner to marketers, agencies, publishers and advertising and marketing technology companies. Prior to AdExchanger, Joanna spent three years at Forrester Research, serving as Principal Analyst. Joanna has more than 15 years of experience in the marketing leadership industry. She started at digital advertising agency Avenue A in New York and was a founding member of Razorfish's ATOM Systems agency trading desk. More recently, she ran brand relations for the Audience on Demand practice at VivaKi, helping advertising clients target and optimize broad-reaching interactive campaigns. Joanna graduated from Vassar College with a B.A. in psychology. She was a member of Phi Beta Kappa and graduated with departmental and general honors.

Latest articles by Joanna O'Connell


From Cannes First-Timer to Cannes Believer

I’ve just returned from my first Cannes Lions and I find myself coming home totally inspired. With attendees ranging from programmatic marketing technology leaders like us to powerhouse agency gro... Read more


Thoughts from a Cannes Lions First-Timer

In three weeks, I’m headed off to Lions, France to attend Cannes Lions for the first time. It’s MediaMath’s fifth year sponsoring the event as a global company with deep roots in EMEA. The Lions f... Read more


Always Do This When Making a Tough Decision

This byline originally appeared yesterday on Every leader makes tough decisions differently, depending on their leadership style, which is often the result of prior experiences and pers... Read more


Why I Joined MediaMath

Today marks my first official day as the new Chief Marketing Officer at MediaMath. And boy did I pick a good time to join. The company moved into 4 World Trade Center last week, giving me sweeping ... Read more