David launched his first venture while an undergraduate biomedical engineering student at the University of Rochester. His company, MonoMano Inc., provides rehabilitative, general health, and social benefits to stroke survivors by making cycling accessible for those with functional use of a single arm and leg. David patented the technology, gathered sufficient funds to launch the business, and continues to manage all company operations. HIs cycling equipment is being used internationally in rehabilitation clinics, adaptive sports centers, and in individual homes. After completing his degree, David enrolled in a graduate program in biomedical engineering at Johns Hopkins dedicated to medical device design. While at Hopkins, he pursued two technologies, one specifically targeting major global health needs in developing nations and another positioned for developed healthcare economies. His first device was one to assist nurses in resuscitating newborns with neonatal asphyxia, a preventable problem that kills a million babies each year. The second device uses ultrasound to detect potentially catastrophic post-operative blood clots while there is time for surgeons to remedy the problem. David spent a year working as a consultant in the Boston area while he and his partner continued developing the clot-detection technology. In 2014, he decided to leave his job to launch a company to develop and market the device. His company has now raised more than $1 million to get the device into patients.