Meet our team.
Aditya Rajagopal
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Dr. Aditya Rajagopal is a Co-founder and CEO of Esperto Medical. He is also a founder and a member of the board of directors at ChromaCode, a multiplexed diagnostics company that uses signal compression to lower costs, increase capacity, and standardize measurement with existing PCR instrumentation. Previously, he was a researcher at Google[x], where he worked on novel medical imaging methods. He has expertise in thermal engineering, digital signal processing, nano-scale electronics, low-power circuit design for implantable sensors, DNA sequencing structures and techniques, and PCR devices and applications.
Additionally, Dr. Rajagopal is part-time faculty in the Electrical Engineering Department at Caltech, and in Biomedical Engineering at USC. He received his BS, MS, and PhD in Electrical Engineering from Caltech.
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Chief Executive Officer, Co-Founder
Alaina Brinley Rajagopal
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Dr. Alaina Brinley Rajagopal is a Co-Founder and CMO of Esperto Medical. She is a board-certified emergency medicine physician with a PhD in public health, virology, and space life sciences. She also has certificates in international medicine, aerospace medicine, and tropical & travel medicine. Her research has been diverse, including space life sciences, virology, public health, aerospace medicine, medical education, paleontology, and more. Additionally, Dr. Rajagopal is part-time faculty in the Electrical Engineering Department at Caltech and practices emergency medicine in Southern California.
Dr. Rajagopal obtained a Bachelor of Arts degree in Biology from Kalamazoo College and her MD and PhD from The University of Texas Medical Branch. She completed emergency medicine residency at the University of California, Irvine.
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Chief Medical Officer, Co-Founder
Yaser Abu-Mostafa
Co-Founder
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Dr. Yaser S. Abu-Mostafa is a Co-founder of Esperto Medical. He is Professor of Electrical Engineering and Computer Science at the California Institute of Technology, and Chairman of Machine Learning Consultants LLC. His main field of expertise is Artificial Intelligence (AI) and Machine Learning (ML). He is the author of Amazon's ML bestseller "Learning from Data". His ML online course (MOOC) has attracted more than 7 million views.
Dr. Abu-Mostafa has served on the Scientific Advisory Board and as a technical consultant on ML for several start-up and established companies, including Citibank for 9 years. He has numerous technical publications including 3 articles in Scientific American, as well as keynote lectures at various international conferences.
Lynne Rollins
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Lynne R. Rollins has over 40 years' experience in the healthcare industry in the areas of finance and business development.
Currently Ms. Rollins is the CFO for numerous start-up pharmaceutical, medical device, and agricultural companies. Prior to that, she was with Baxter Healthcare Corporation for 19 years. Her positions there included Vice President of Business Development for the Cardiopulmonary Business, Vice President of Finance for the Cardiopulmonary Business (Bentley Division) and numerous finance positions within the Hospital Products Group of the Corporation. Ms. Rollins received her Bachelor of Science degree in Finance from California State University and her MBA from Pepperdine University.
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Chief Financial Officer
Raymond Jimenez
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Raymond Jimenez is the Chief Technology Officer for Esperto Medical, where he specializes in rapid iteration and technology development. Before Esperto, Raymond led several efforts at SpaceX (where he operated Dragon missions to the International Space Station, commanded a satellite test fleet, and redesigned Falcon & Dragon navigation sensors), Boeing (where he designed power supplies for geostationary communications satellites), and Phase Four (where he led electronics development for the company's first flight-ready plasma thrusters).
Mr. Jimenez specializes in full-stack electrical engineering, spanning system design through firmware devlopment and product test. By leveraging the ever-marching trend of miniaturization in consumer and industrial electronics, he aims to bring ever more efficient and compact designs to previously untapped fields.
Raymond Jimenez received his BS in Electrical Engineering from Caltech.
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Chief Technology Officer
Jeff Stoll
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Dr. Jeff Stoll is the Chief Product Officer at Esperto. He brings 20+ years of senior leadership experience in medical device product management, clinical trials management, regulatory affairs, and R&D. He has led the successful development, launch, and commercialization of multiple award winning products in medical ultrasound, diagnostics, and rehabilitation. Before joining Esperto he led global product marketing for premium ultrasound products at Siemens Healthineers, global product management at Ekso Bionics, innovations at Hound Labs, and market development and access at NephroSant. Jeff has a B.S. in Engineering from Harvey Mudd College and a Ph.D. from Boston University focusing on robotics and controls in surgery.
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Chief Product Officer
Brett Brown
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Brett Brown brings over 20 years of experience in finance, corporate management, and human resources, with a track record across diverse industries and company stages. He is passionate about helping companies with transformative technologies scale their teams strategically. At Luxtera—a pioneer in optical and electronic integration—he played a key role in guiding the company from early R&D through to its initial revenue phase. Most recently, as VP of Finance at ChromaCode, Brett led finance and HR over a seven-year span, helping grow the company from an early R&D concept to over $30 million in annual revenue.
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SVP Operations and Finance
Elizabeth Gress
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Elizabeth Gress is Head of Clinical Operations at Esperto Medical. She comes to Esperto from a 15-year career running medical device innovation and entrepreneurship programs at UC San Francisco, where she advised and supported startups and faculty innovators with their FDA interactions, clinical trials, business planning, grant writing, and finance and operations. At UCSF she served as the founding Program Director of the FDA-sponsored UCSF Pediatric Device Consortium and the Department of Surgery’s Surgical Innovations initiative, which she grew from unfunded concepts into fully staffed programs with a combined operating budget of $3 million/year. Ms. Gress is a co-founder of next-generation renal replacement startup Silicon Kidney and holds an MPA from UC Berkeley and a BA from Williams College.
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Head of Clinical Operations
William Dempsey
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Dr. William Dempsey is the Head of Research at Esperto Medical. William obtained his BS and MS from Johns Hopkins University in Biomedical Engineering, where he modeled cancer-relevant biochemical reaction systems in silico. Subsequently, he obtained his PhD in Bioengineering at Caltech, developing a set of nanoparticle and non-invasive transgenic-based imaging tools to tackle fundamental questions in early development and wound repair in vivo. After refining his skills in nonlinear imaging at Caltech, Dr. Dempsey examined novel fluorescence and harmonic imaging phenomena at ETH Zürich in Switzerland, uncovered foundational structural correlates in the brain during memory formation at the University of Southern California, and returned to Caltech to track early stage mammalian development with high spatiotemporal resolution. Before joining Esperto Medical, Dr. Dempsey developed assays and analytical methods for spatial multi-omic sequencing applications at Singular Genomics.
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Head of Research
Virginia Lin
Senior Mechanical Engineer
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Virginia Lin is a mechanical engineer with over 10 years of experience developing medical devices across ophthalmology, cardiovascular, orthopedic, and patient monitoring. She has guided multiple products from early concept through clinical trials and is listed on several patents. Before joining a VC-backed ophthalmology startup as an early R&D team member, Virginia held engineering roles at Edwards Lifesciences and OrthAlign, where she worked on wearable sensors and orthopedic navigation tools. At Edwards, she contributed to the Clearsight system, helping refine its volume clamping technology and gaining a strong foundation in continuous blood pressure monitoring—a challenge she’s now revisiting with renewed excitement. She earned her B.S. in Biomedical Engineering from Georgia Tech and focuses on building practical, hands-on solutions.
Daniel Cellucci
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Dr. Daniel Cellucci is a Senior Electrical Engineer for Esperto Medical, where he specializes in the design of the sensing and data collection pipeline. Prior to joining Esperto, Dr. Cellucci was an Aerospace Technologist at NASA Ames Research Center, focusing on projects involving distributed sensing and autonomous decision making in both spaceflight and aeronautics. There, he developed and led the demonstration concept for the Distributed Spacecraft Autonomy project and worked with the Convergent Aeronautics Systems' program to implement a distributed pressure sensing platform for characterizing the behavior of aeroelastic wings made from discrete cellular solids. After leaving NASA, he co-founded an NSF-funded startup, Metavoxel, that sought to commercialize the discrete cellular solids technology. Daniel received his Ph.D. from Cornell University in 2019, and his B.S. in Physics from the University of Georgia in 2012.
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Senior Electrical Engineer
Anna Nadtochiy
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Dr. Anna Nadtochiy is an Algorithm Engineer II at Esperto Medical. She received her BS and MS in Biophysics from Lomonosov Moscow State University, exploring the use of semiconductor membranes for nanoparticle filtering and DNA translocation control. Anna then pursued her Ph.D. in Computational Biology at the University of Southern California, where she integrated biology, software engineering, and artificial intelligence to advance bioimage analysis. Her doctoral research focused on analyzing extensive four-dimensional imaging datasets using modalities like Confocal, Light-Sheet, and Light-Field Microscopy to investigate synaptic changes and neural activity at the single-cell level. At Esperto, Anna applies her expertise to develop computational pipelines, enhancing the analysis and interpretation of complex imaging data.
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Senior Algorithm Engineer
Mimi Lan
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Dr. Mimi Lan is an Industry Postdoctoral Fellow at Esperto Medical. She studied at UC Berkeley for her BS in Bioengineering and conducted her PhD research at Dartmouth. She brings expertise spanning medical device design, human physiology, and advanced sensing modalities. Her doctoral research focused on two parallel areas: the effects of microgravity on human physiology and electrical impedance tomography (EIT). As PI on two NASA grants, she developed a compact urinary calcium measurement device and investigated nebulized scopolamine for space motion sickness. She also participated in orbital and suborbital payload missions on SpaceX and Blue Origin vehicles. In parallel, she applied EIT to tissue engineering, designing an EIT-instrumented bioreactor for continuous monitoring of cell growth.
Before her PhD, Mimi spent eight years in industry designing orthopedic implant systems and consulting in aerospace engineering with SpaceX, Virgin Orbit, and Rockwell Collins. She holds a patent on radial head prosthesis design and has extensive experience translating physiological understanding into practical medical technologies.
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Industry Postdoctoral Fellow
Vern Norviel
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Vern has four decades counseling innovative life sciences companies and working closely with them to develop successful business and IP strategies. In his legal practice, he has represented a wide variety of companies, as well as venture capital firms, in areas such as therapeutics, diagnostics, nanotechnology, genomics, proteomics, and personalized medicine. He has also served as a founder, and business counselor to a range of life science companies, including Affymetrix, which he took public (IPO lead to $10B market cap). Vern is recognized among the country's top life sciences attorneys in Chambers USA: America's Leading Lawyers for Business. A fun fact about Vern: his interest in the field of personalized medicine prompted him to become the first attorney to have had his/her entire genome sequenced and made available in a public database. He has served on a number of boards of academic institutions and life science institutions in neurology, oncology, and related human and animal health organizations. In academics, he has served as an adjunct professor in biotechnology for over 14 years.
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Legal Counsel
Investors.
Helen McBride
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Helen McBride, PhD, is a Partner at Bold Capital Partners, investing at the intersection of technology and life sciences to advance human healthspan. McBride previously held senior roles at TORL Biotherapeutics, Caltech, and Amgen—leading projects from early discovery through commercial launch.
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Partner at Bold Capital.
Medical Advisory.
Ranndy Kellogg
Member of Board of Directors at AliveCor.
Former CEO at Omron Healthcare. Inc.
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Ranndy Kellogg has built a distinguished career in healthcare as an executive leader, innovator and catalyst for change in the transformative evolution of technology, data and services. Recognized among the Most Notable Leaders in Health Care by Crain’s Chicago Business, he has served as a keynote speaker at major events from CES to the Harvard Business School Health Care Conference.
Mr. Kellogg is the founder of the Take Care of Your Heart Initiative, a venture dedicated to addressing urgent health disparities in cardiovascular care through the development of breakthrough new medical technologies. Under his leadership, Take Care of Your Heart is prioritizing the heart health crisis in maternal care, which has become a leading cause of pregnancy complications for mothers and infants globally. Ranndy advises digital health companies and founders on the path to bring new innovations to market, including navigating the regulatory environment, advancing through FDA review, and fostering adoption across medical professional and patient constituencies.
He serves on the board of directors for AliveCor, a leading innovator in EKG technology and artificial intelligence and is a board member of HealthCorps, a non-profit which promotes health and wellness for our nation’s youth. He is a recent board member of the Consumer Technology Association’s Health and Fitness Technology Division and the American Heart Association.
Previously, as president and CEO of Omron Healthcare, Mr. Kellogg led the company’s presence across the U.S., Canada and Latin America and guided the business to new levels of growth and recognition as America’s number one doctor and pharmacist recommended blood pressure monitor brand. Ranndy spearheaded Omron’s Going for Zero mission to eliminate heart attack and stroke and reinvented the company through the introduction of groundbreaking medical technologies and partnerships to bridge health gaps.
Prior to OMRON, Ranndy held executive positions in marketing at Baxter International and CR Bard where he led global teams in driving growth, expansion and innovation. He holds a Master’s in Business Administration from Northwestern University’s Kellogg School of Management.
His specialties include Portfolio Management, Connected Health, Health Equity, Business Development, Social Marketing, Web Marketing and Partnerships.
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Chris Fox
Professor and Chair of Emergency Medicine at University of California, Irvine.
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A professor and chair of emergency medicine and current director of ultrasound in medical education, Dr. Fox’s clinical research interests lie in emergency ultrasound. He is dedicated to promulgating the use of ultrasound at the point-of-care through research, teaching, leadership and clinical expertise, mirroring UCI's mantra, Discover, Teach, Heal. Dr. Fox earned his MD from Tufts University School of Medicine. He did his residency in emergency medicine at UCI. He also completed a fellowship at the University of Illinois at Chicago in emergency ultrasound. Dr. Fox serves on the board of directors for both the Society of Ultrasound in Medical Education and the Catalina Island Medical Center. Dr. Fox joined UCI School of Medicine in 2001. Prior to his role in the Department of Emergency Medicine, he served as assistant dean for Student Affairs at the UCI School of Medicine, and as Director of the ultrasound fellowship in emergency medicine. He became the Chair of Emergency Medicine in 2019. In addition, Dr. Fox has published over 100 peer-reviewed papers and contributed to three textbooks, two of them as sole editor. He has been invited to lecture more than 450 times in 49 states and 15 countries, including a TEDx UCI talk titled, “The Point of Care Revolution; Ultrasound,” watched 34,000 times.
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Neil Ray
Founder, Raydiant Oximetry Inc.
Staff Anesthesiologist for Kaiser Permanente.
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Dr. Neil P. Ray, MD is a board-certified pediatric anesthesiologist who founded Raydiant Oximetry, Inc – a medical device corporation in the women’s healthcare space with a mission to improve outcomes for mothers & babies during childbirth.
Dr. Ray was the founding CEO from 2017-2025 and during his tenure, he raised over $20M in private investments and awarded nearly $10M in non-dilutive funding. He was able to achieve FDA Breakthrough Designation for expedited review and achieved FDA IDE approval to initiate a clinical study in pregnant women during labor. Furthermore, Raydiant Oximetry announced a strategic partnership with GE Healthcare while he was CEO.
Dr. Ray remains clinically active in pediatric and obstetrical anesthesiology. He is also an oral board examiner for the American Board of Anesthesiology.
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Jessica Mega
Cardiologist at Stanford Health Care.
Co-founder at Verily.
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Jessica L. Mega, MD, MPH is a leader at the intersection of technology, life science, and health. She is a Cardiologist at Stanford and serves on the Advisory Board for Stanford's Center for Digital Health. She is a Co-Founder of Alphabet's Verily and former Chief Medical Officer of Google Life Sciences. She is on the Board of Directors at Boston Scientific and Danaher Corporation, as well as the Board of Advisors for Research!America and the Duke-Margolis Center for Health Policy.
As a faculty member at Harvard Medical School, a Senior Investigator with the TIMI Study Group, and a Cardiologist at Brigham and Women’s Hospital, Dr. Mega led large, international, randomized trials evaluating novel therapies and new medical technologies. She directed the TIMI Study Group’s Genomics Program, demonstrating and testing the role of CYP2C19 genetic variants on antiplatelet medications, a key pharmacogenetic finding. She has published manuscripts in the New England Journal of Medicine, Lancet, and JAMA. She served as an Advisor for the California Governor’s Precision Medicine Initiative.
Dr. Mega is a graduate of Stanford University, Yale University School of Medicine, and Harvard School of Public Health. She completed Internal Medicine Residency at Brigham and Women’s Hospital and Cardiovascular Fellowship at Massachusetts General Hospital. She is board certified in Internal Medicine and Cardiology. She has won the Laennec Society, Samuel A. Levine, and Douglas P. Zipes Awards, and she is a Fellow of the American Heart Association (AHA) and the American College of Cardiology (ACC). -