Presolicitation notice from the DEPT OF DEFENSE, DEFENSE HEALTH AGENCY (DHA) is seeking maintenance services for Clinical Data eXchange Hemodialysis Units in Portsmouth, VA. The notice states that the Government intends to award a sole source Firm-Fixed-Price contract to Fresenius USA for commercial-off-the-shelf (COTS) maintenance services for the hemodialysis units. The contract will consist of a base year and three option years, with a total estimated value of $218,160.00. The notice emphasizes that competition would need to demonstrate clear and convincing evidence of its advantages to the Government and not hinder the mission objective of NMRTC Portsmouth. This is not a request for quote or proposals. For more information, contact Contract Specialist Melissa Peregrino-White at melissa.peregrino-white.civ@health.mil.