WHOOP Names Dirk-Jan "DJ" van Hameren Chief Marketing Officer as Member Base Surpasses 3 MillionContributed by: Business WireLogoImagesTagsWearables/Mobile TechnologyMobile/WirelessTechnologyMedical DevicesFitness & NutritionHealth TechnologyHardwareGeneral HealthHealthConsumer ElectronicsDirk-Jan "DJ" van Hameren