Our team

David is the CEO and co-founder of Linus Health. He is a scientist, engineer, inventor, entrepreneur and investor. David was a founding partner of Tamarisc Ventures and he co-founded Bode, a tech-enabled hospitality company for group travel. He is on the board of several technology companies, as well as the philanthropic TMCity Foundation. David has previously held positions at Morningside Ventures, F-Wave, Harvard Medical School, Massachusetts General Hospital, University of Louisville, and Georgia Tech. David earned his PhD in Chemical and Materials Engineering from the University of Auckland and earned his BS and MSc in Applied Biology from the Georgia Institute of Technology. He resides in Boston with his wife and kids.

Alvaro is a co-founder and Chief Medical Officer of Linus Health. He is also a Professor of Neurology at Harvard Medical School, a Senior Scientist at the Hinda and Arthur Marcus Institute for Aging Research, and the Medical Director of the Deanna and Sidney Wolk Center for Memory Health at Hebrew SeniorLife (HSL) in Boston, MA. A major focus of Alvaro’s scientific work is to characterize and promote brain health across the lifespan, prevent age-related cognitive decline, and minimize disability in patients with neuropsychiatric disorders while gaining fundamental insights into human brain function. He is considered a pioneer in non-invasive brain stimulation and has published more than 800 scientific peer-reviewed papers. Alvaro remains a practicing cognitive neurologist and dementia specialist with a focus on comprehensive, patient-centered, personalized care.He obtained an MD and PhD in Neurophysiology at the University of Freiburg i.Br., Germany. He completed his residency in Neurology and a fellowship in Clinical Neurophysiology at the University of Minnesota. Alvaro trained in Human Cortical Neurophysiology and Motor Control at the National Institutes of Health and was a Scientist at the Spanish Research Council’s Cajal Institute. Alvaro has been honored with many international awards and is an elected member of the Spanish Royal Academy of Pharmacy.

John Showalter is the Chief Operating Officer at Linus Health, where he oversees the company’s operations and drives cross-functional alignment across product, medical, growth and service design to accelerate innovation and execution. Prior to his promotion, John served as Linus Health’s Chief Product Officer and Chief Strategy Officer, leading the integrated strategy for the product, medical, and analytics teams. Before joining Linus, John was the Chief Product Officer at Jvion, the industry leader in clinical artificial intelligence. There, he joined the founders to expand the product portfolio from two to 35 offerings, including the COVID-19 response suite—recognized as a Fast Company World Changing Idea—which earned him recognition from Modern Healthcare as a Top 25 Innovator in Population Health. Earlier in his career, John served as the Chief Medical Informatics Officer and Chief Health Information Officer for the University of Mississippi Health System, where he also practiced as a primary care physician. John earned his BS in biomedical engineering from Columbia University and his MD from Penn State University College of Medicine. He completed his residency in Internal Medicine and the first ABIM fellowship in Clinical Informatics at Penn State Hershey Medical Center. He recently returned to his hometown, Danville, PA, where he lives with his wife and their four youngest of five children.

Seamus Small is Managing Director of Life Sciences & International, where he leads international activities across healthcare delivery and life sciences. Seamus joined Linus Health in March 2022 as part of the acquisition of Kinesis Health Technologies (Kinesis), where he was CEO. Seamus has been in a leadership position in health technology and aging research for almost 20 years. Prior to co-founding Kinesis in 2013, Seamus spent more than 6 years leading the TRIL centre, a $30 million industry-academic aging research program. Earlier in his career, Seamus previously spent 8 years working for Intel in an IT/consulting capacity across multiple business groups. Seamus is a Computing Science graduate from Ulster University and an MBA graduate from Dublin City University. Seamus lives in Dublin, Ireland with his wife and four boys.