Mediassociates Bolsters Staff, Leadership Team As Client Roster Expands

Sandy Hook, CT-based Mediassociates has promoted three executives into newly created roles to lead its expanding staff and client portfolio.

The agency has doubled billings in the past year to $200 million by adding clients like Fannie Mae, Ziply Fiber, Strava, Rochester Regional Health, and Midflorida Credit Union. To keep pace, the agency has grown from 60 to 100 employees. 

“We’re expanding our leadership to ensure we keep clients ahead of the relentless change in media,” said Jeff Larson, President of Mediassociates.

Jesse Rosenschein takes on the new position of senior vice president, head of integrated investment, responsible for all client investment decisions across digital, traditional, mobile, and emerging media.  She joined the agency in 2017 and is credited with expanding the shop’s digital practice by delivering improved results for clients. 

Mark Mirsky assumes the new position of senior vice president, head of account strategy, and will oversee all the agency’s media planning functions and teams. Mirsky joined Mediassociates in 2020 following a long tenure at OMD. He’s credited with expanding the agency’s largest accounts with a holistic planning approach.  



Jim Santa Barbara becomes executive director, insights and analytics, responsible for all data insights, measurement, reporting, and modeling at the agency. Since joining Mediassociates a year ago, Santa Barbara has advanced business forecasting for clients by developing insights via first-, second- and third-party data. He will lead the agency’s in-house analytics team in building new integrated measurement systems.



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