The purpose of this acquisition is to obtain services to operate the Scientific Registry of Transplant Recipients (SRTR). The Contractor will be responsible for providing statistical and other analytic support to the Organ Procurement and Transplantation Network (OPTN) for purposes including the formulation and evaluation of organ allocation and other OPTN policies.  Additionally, the Contractor will provide analytic support to the Department of Health and Human Services (HHS) in a variety of areas including: policy formulation and evaluation, system performance metrics, economic analysis, and preparation of recurring and special reports to Congress.  The contractor will also make updated and modernized Simulated Allocation Models (SAMs) software available to the public through an open source distribution mechanism.