Paris Geogallis
Executive Advisor & Investments
WHO WE ARE
Built on a passion for
personalized health.
The Nexus Health team believes people deserve to understand what’s happening in their bodies and have a clear plan for what to do next.
“Your labs are normal” should never end the conversation.
When you still don’t feel well, being told your labs are normal can leave you unsure of what to do next. Those questions deserve time and a closer look at your symptoms, intake data, and results.
Your body is connected. Your health data should be, too.
You may have blood work from your regular doctor and more tests from your functional medicine provider. Then there’s your DNA report and the data from your watch. You have all this information about your health, but it’s spread out, and you’re left trying to understand how it all fits together.
The Nexus Health team started with DNA and blood work because each gives us different clues. We wanted to help people and their doctors understand what those clues might mean when viewed together.
Everyone deserves to understand their health.
The Nexus Health team built this platform for you and the doctors who care for you. We wanted to make it easier to understand your health and give functional medicine doctors a better way to see how your results fit together. Making that help affordable for more people is a big part of why we’re doing this.
WHAT WE BELIEVE
Nexus Health team values
These are the things we want people to be able to count on when they work with us.
Look at the whole picture.
A single result can only tell us so much. We look at how the clues fit together.
No kickbacks.
No data sold, no pharmaceutical relationships, no reason to suggest anything but what’s right for you.
Show the work.
You should be able to see why a finding was raised and ask questions about it.
Keep learning
Your health changes over time. We believe understanding it should be an ongoing conversation.
MEET THE FOUNDERS
Nexus Health founders.
Two people who lived the problem.
They built Nexus because they needed answers, too.
For Steven and John, this work is personal. One lost his father before learning about a genetic trait they shared. The other spent 20 years living with a chronic condition, with treatments that never fully explained his symptoms.
They built Nexus for people still looking for answers, and for the doctors trying to help them.
MEET THE HUMANS
Meet the Nexus Health team.
The Nexus Health team brings together experience in healthcare technology, design and compliance. We’re working to make health information easier to understand and more useful for the people who rely on it.
Jono Grimes
Head of User Experience
Nas Zahar
Media Content Strategist
OUR PARTNERS
Working together to make better care possible.
Meet the organizations helping us bring Nexus to more people and practices.
REGENERATIVE MEDICINE
Matrix Biologics
Connects clinicians with biologic therapies. Nexus adds patient-specific insights to help its network build more informed care plans.
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PERFORMANCE & LONGEVITY
Never Peak
An Austin medical practice for active adults and athletes. Nexus helps its clinicians connect lab and genetic findings with each person’s health and performance goals.
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PRIMARY CARE & LONGEVITY
BodyTime
A virtual primary care and longevity practice. Nexus adds genetic and biomarker insights to help its clinicians understand the person behind the lab results.
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FUNCTIONAL MEDICINE
Gila Valley Premier Care
A functional medicine and longevity practice in Safford, Arizona. Its team uses Nexus to bring more context to each person’s results and care plan.
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DNA TESTING
GeneMetrics
A DNA testing partner that supports the genetic side of Nexus, helping bring genetic findings into the same picture as labs and intake data.
Visit website1–3 of 5 partners
Want to know more about Nexus?
Whether you’re looking for help understanding your health or exploring Nexus for your practice, we’d be glad to talk.
Talk with our teamJohn Whitman
Co-Founder & CIO
John Whitman has spent over a decade designing systems where failure was not an option. Pharma-grade data centers. Federal compliance environments. 1,500+ hypervisors, 25,000+ servers. VCDX #226. Principal Systems Engineer at SpaceX, where he built infrastructure for launch systems, Starlink, and Star Base.
He came to healthcare the same way he came to every other domain: as an engineer who wanted to understand the requirements before writing a line of code. What he found was a field with more raw data than almost any other, and almost no infrastructure for making it reason across systems. Labs siloed from genetics. Genetics siloed from clinical history. Clinicians synthesizing manually what a well-built system should be able to structure.
He built it for clinicians who already understand the complexity of what they’re managing. They don’t need a system that simplifies their work. They need one that structures it well enough to trust.
Steven Taylor
Co-Founder & CEO
Steven Taylor spent nine years at VMware, held VP of Solutions Engineering at Riverbed, and served as Executive Director at Wells Fargo overseeing cloud product adoption at scale. His career has been built on one skill: taking complex systems and making them legible to the humans who have to trust them enough to act.
He came to Nexus not as an investor or a technologist with a healthcare hypothesis. He came as a patient. For 20 years he managed an autoimmune condition that at its worst left him unable to walk without help. He tried every approach available, conventional and functional, and worked with clinicians who were excellent within their domain and had no visibility beyond it. The consistent failure was not a lack of care or competence. It was a lack of structure.
Labs in one place, genetics in another, clinical history scattered across providers, and no system that could read all of it together.
When his co-founder John Whitman brought him the BioMatrix concept, Steven did not evaluate it as a co-founder first. He tested it on himself, on 20 years of his own clinical data. What came back was not new data. The data had always existed. What was new was seeing it prioritized, sequenced, and read across systems in a way that finally made clinical sense.
That is why he is building Nexus. Not to replace the clinicians who spent those 20 years working through his case. To give them a better tool for doing what only they can do.
Paris Geogallis
Executive Advisor & Investments
Paris Geogallis is an Executive Advisor and Investments professional known for his strategic financial leadership. He excels at identifying and capitalizing on complex investment opportunities, using his deep understanding of global economics to drive growth and profitability for the organizations he works with.
As a trusted advisor, he provides strategic counsel that goes beyond financial matters. Paris is valued for his ability to translate financial data into clear, actionable strategies, helping his clients make confident, informed decisions.
Dr. Michael Hasegawa
Medical Advisor
Dr. Michael Hasegawa, MD, is a seasoned board-certified Emergency Medicine physician who most recently served as Medical Director at SignatureCare Emergency Center in Texas. His clinical practice has focused on high-acuity emergency care, guiding operational and quality-assurance initiatives while maintaining a hands-on presence in complex patient care.
His work with SignatureCare and affiliated hospital systems makes him deeply familiar with the systems, metrics and workflow demands of acute care medicine.
As a Medical Advisor for Nexus Health, Dr. Hasegawa will bring his acute-care perspective to our technology ecosystem, collaborating on clinician-workflow refinement within our BaselineONE platform and helping shape the protocol logic embedded in our BioMatrix™ engine. His goal is to ensure that our AI-driven solutions maintain clinical relevance, operational scalability, and the kind of rapid decision support required in emergency-care settings.
Dr. Steve Elsbecker
Medical Advisor
Dr. Steve Elsbecker, DO, FACEP, is a board-certified Emergency Medicine physician and the Regional Medical Director for SignatureCare Emergency Center. With more than a decade of frontline experience across high-acuity emergency departments, he brings deep clinical insight, operational leadership, and real-world decision-making expertise.
His background spans multi-site medical oversight, quality-of-care optimization, and the development of scalable clinical workflows — experience that directly strengthens Nexus Health’s clinician-focused systems.
As a Medical Advisor to Nexus Health, Dr. Elsbecker helps guide the evolution of our AI-powered clinical platforms, including BaselineONE and the BioMatrix™ Intelligence Engine. His role centers on aligning our technology with evidence-based medical practice, enhancing safety layers, and ensuring our solutions reflect the precision, clarity, and workflow efficiency physicians need.
Dr. Elsbecker’s combination of clinical credibility and systems-level perspective supports Nexus Health’s mission to empower doctors with intelligent, human-centered AI.
Chris Brogan, NP
Medical Advisor
Christopher Brogan is a dual-certified nurse practitioner in Family Practice and Adult-Gerontology Acute Care, bringing deep clinical expertise in primary care, gastroenterology, and wellness.
As Nexus Health’s Medical Advisor, he provides clinical oversight across our AI platforms including BaselineONE, BioMatrix™, and the CSE (Couples Simulation Engine), ensuring every recommendation is safe, evidence-based, and patient-centered. With experience as both a provider and the founder of 5C Wellness, Christopher bridges frontline care with innovation, helping Nexus Health deliver technology that empowers clinicians and patients alike.
Beyond the clinic, Christopher is passionate about the future of AI-driven health. His work with Nexus Health reflects his belief that technology should amplify compassion, not replace it, so clinicians can deliver care that’s precise, personalized, and deeply human.
Tasha Whitman
Head of Business Development
Tasha has been building things on the internet since 2003, long before anyone called it digital marketing. After a decade at a San Francisco marketing firm, she stepped away in 2020 to homeschool her kids. When Nexus Health came along, she dusted off her skills to join something she genuinely believed in.
She is not a healthcare person by training. She is a researcher and a builder who fell in love with a problem worth solving. At Nexus Health, that problem is a personal one: real people with real answers finally within reach.
Today she leads digital strategy, campaigns, social media, and the vendor and partner relationships that keep the company moving. What drives her is the intersection of new ideas and real outcomes. She would rather test something and learn than wait until it is perfect.
Jennifer Duran
Compliance Officer
Jennifer leads our compliance efforts, ensuring Nexus achieves and maintains the certifications needed for HSA/FSA eligibility and insurance partnerships. She drives our expansion into the healthcare ecosystem by strengthening credibility and trust. With over 10 years of experience in healthcare sales, compliance, and copywriting, Jennifer guides organizations through complex regulatory environments while supporting growth.
At Nexus Health, she ensures we not only meet regulatory standards but also deepen trust with clients, partners, and patients.