UK marketing group Gravity Global continues its North American expansion with the acquisition of Northampton, MA-based media agency Marketing Doctor for an undisclosed price.  

The shop was founded by Janet Casey in 2003. The agency has worked with clients such as Skullcandy, New York Bariatric Group, Papa Gino’s Pizzeria, D’Angelo Grilled Sandwiches, the federal government, and more.  

According to the agency in recent years it has expanded globally, adding top talent in Argentina, Colombia, and the Philippines. 

“Marketing Doctor is the kind of partner that transforms outcomes,” said Jose Lozano, North America CEO at Gravity Global. “Their focus on measurable impact and trusted client relationships makes them a perfect addition to our global offering.” 

Lozano founded marketing group 9thWonder in 2018. He sold the company’s B2B operation to Gravity Global in 2022. At the time of that transaction Lozano joined Gravity as US CEO while remaining head of the portion of 9thWonder that remained independent. Gravity acquired the rest of the agency in 2023.  

As part of Gravity Global, Marketing Doctor will remain based in Northampton while integrating into the broader network.  

Pictured above (l to r) are Gravity Global CEO, Mark Lethbridge and Marketing Doctor Founder-CEO, Janet Casey.