Meet the team
Guided by experience across science, technology, and healthcare, the leaders at Sampled are dedicated to delivering the highest standards for our customers while creating a culture where people can thrive.
John S. DelliSanti
Chief Executive Officer and Chair
John has built his career at the intersection of science and business, from his education in chemistry to his leadership today as CEO of Sampled. He has played a key role in growing life sciences organizations by developing customer-focused strategies, expanding service offerings and capabilities, and fostering collaborations that advance scientific progress. John brings a mission-driven approach to leadership, ensuring that business success is aligned with meaningful impact for researchers, clinicians, and the broader life sciences community.
Vaishali Rathod
Chief People Officer
Vaishali brings more than two decades of HR leadership experience across Fortune 50 organizations and private equity-backed companies. She has a strong track record of building high-performing cultures, developing exceptional leaders, and aligning people strategies with business growth. Before joining Sampled, Vaishali served as Chief People Officer at Tandym Group, where she helped guide the people strategy for a rapidly growing private equity-backed organization. Earlier in her career at Johnson & Johnson, she held leadership roles across multiple sectors and served on several diversity and inclusion boards, reflecting her commitment to fostering inclusive cultures and developing diverse talents.
Nick Mitropoulos
Chief Commercial Officer
Nick is an accomplished commercial leader with more than 30 years of experience building and scaling global sales and marketing organizations in the life sciences industry. He has held senior leadership roles at Quanterix, Taconic Biosciences, PerkinElmer, and other pioneering life sciences companies, where he drove international growth and developed high-performing commercial teams. As Chief Commercial Officer at Sampled, Nick leads the company’s global sales and marketing strategy, strengthening client partnerships and expanding access to the services that accelerate scientific progress.
Larry Stabler
Chief Financial Officer
Larry is an accomplished financial executive with extensive experience guiding private and public companies through growth, transformation, and change. He has held senior leadership roles across multiple professional services, technology, and life sciences, with a focus on financial strategy, operational efficiency, and acquisition integration. At Sampled, Larry serves as Chief Financial Officer, ensuring that financial and business operations support the company’s mission and long-term success.
Shareef A. Nahas, PhD, ABMGG, FACMGG
Clinical Laboratory Director
Shareef brings deep expertise in genomics and laboratory operations, with senior leadership experience at Rady Children’s Institute for Genomic Medicine, Genoptix (Novartis), and Ambry Genetics. He earned his Ph.D. in Molecular Toxicology from UCLA and completed a Clinical Molecular Genetics Fellowship through the UCLA Intercampus Laboratory Genetics, Genomics, and Medical Training Program. Shareef has authored or co-authored more than 40 peer-reviewed scientific publications.
