Greg Koerner [ker-ner] is a veteran of the marketing and advertising industry. He serves as the Head of Partnerships and Agency Relations at Roundel, Media reimagined by the Target Corporation (TGT).

Formerly, he was at Apple Inc. (AAPL); there Koerner led the Central Sales team at iAd, partnering and strategizing with world’s largest marketers such as Procter and Gamble, Target, General Motors, State Farm, and scores of others.

Previously, Mr. Koerner served as CMO and CRO of Mediaocean LLC, as well as held executive sales positions at Yahoo! and at DoubleClick.


From 2007-2020, he served on the Board of Directors at Ronald McDonald House Charities of Chicagoland and Northwest Indiana. Mr. Koerner has presented regularly at marketing industry events and he has guest-lectured at Loyola University-Chicago, Northwestern University, and regularly at John Carroll University, his alma mater.


He lives in the Chicago area with his wife and four children and the family’s Labrador, Olive.