The core company in this cluster is Pfizer, Inc., whose Global Research and Development Headquarters are located in two facilities in Groton and New London.  Pfizer employs approximately 5,200 people directly with an additional 1000+ contract employees.   In addition, the two major hospitals in the area, New London's Lawrence & Memorial, and Norwich's William W. Backus, have close to 4,000 additional employees.

Other healthcare manufacturers, researchers  and providers in the area include Carwild,  DeKalb Genetics, Medtronic Merocel,  Kendle Corporation, Life Pharms and more.

Total employment in this sector exceeds 13,000 and continues to grow.