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Our Team

Our Team

The Yunara Life was brought together by a shared vision – to create a place where every patient feels truly supported, understood, and cared for. Each of us comes from different areas of medicine, wellness, and innovation, but we’re united by one priority: you. We believe safety and compassion go hand in hand. That’s why every treatment, protocol, and decision is guided by providers who genuinely care about both our individual patients as well as the community around us. Together, we’re building a new kind of healthcare experience – one grounded in trust, integrity, and a genuine commitment to helping you live your healthiest, happiest life.

Erika Chen, FNP-BC

Founder

Chief Executive Officer,
Chief Alignment Officer

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Marcus Dillavou

Co-Founder

Chief Technology Officer

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Craig Zebuda, MD

Chief Medical Officer

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Esther Han, DO, FACS, FACOS

Head of Hormone Optimization and Pelvic Health

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Dan Frogel, MD

Board Co-Chair

Clinical & Operations Advisor

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Mamei Sun, JD

Board Co-Chair

Fundraising, Marketing, & GTM Advisor

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Lily Page

Sales & Strategic Advisor

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Rex Chou

Brand & Consumer Strategy Advisor

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Sebastijan Orlić, PhD

Scientific Advisor

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Ruth Ku

Financial Strategy & Fundraising Advisor

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Michael Wolfeld, MD

Medical Aesthetics Advisor

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Erika Chen, FNP-BC

Founder

Chief Executive Officer, Chief Alignment Officer

Erika Chen, a board-certified nurse practitioner, combines clinical expertise with exceptional business acumen in her role as CEO of Yunara Life. She earned her BBA in Marketing from Texas A&M, her BSN and MSN in Nursing from Columbia University, and completed a fellowship in emergency medicine.

Prior to founding Yunara Life, Erika held administrative and clinical roles during the growth phase of One Medical (pre-IPO/Amazon acquisition) and worked closely with engineers and product managers to streamline the company’s digital products, gaining firsthand experience in scaling tech-enabled, patient-centered care. Her earlier career as a brand manager and makeup artist for the skincare company Philosophy sharpened her ability to merge science and sales, while her experience as an educator in music, academics, and nursing cultivated her talent for inspiring and engaging people across disciplines.

Erika’s lifelong dedication to guiding people on their journey of self-actualization is the foundation of Yunara Life. As Chief Executive Officer, she leads the company’s strategic growth with entrepreneurial vision and a deep understanding of both healthcare and consumer markets. In her role as Chief Alignment Officer, she ensures that Yunara’s culture, mission, and community remain deeply connected and rooted in balance, fulfillment, and authentic living. Having lived in both Colombia and Taiwan, she is fluent in Mandarin and Spanish and brings a global perspective to her work. At the heart of her vision is a company culture grounded in kindness, inclusivity, and genuine care, both within Yunara Life and in the world beyond.

Marcus Dillavou

Co-Founder

Chief Technology Officer

Marcus Dillavou serves as Co-Founder and Chief Technology Officer of Yunara Life, bringing nearly two decades of experience at the intersection of advanced technology and healthcare innovation. He is the founder of VIPAAR (now HelpLightning, valued at $39MM), where he pioneered augmented reality solutions for remote surgery and clinical training and successfully commercialized five patents. With a background in scientific visualization and high-performance computing, Marcus combines technical depth with practical application, consistently bridging emerging technologies with critical clinical needs.

Throughout his career, Marcus has led engineering, system design, and platform development with a focus on AI, healthcare SaaS, and scalable architectures. At HelpLightning, he was responsible for building robust platforms that delivered interoperability and reliability at scale, enabling sustainable growth and widespread adoption in the healthcare sector.

At Yunara Life, Marcus directs the development of the company’s core digital platform and technical strategy. His leadership ensures that our technology not only aligns with clinical and operational goals but also anticipates the next wave of healthcare innovation, turning ambitious ideas into durable, scalable solutions.

Craig Zebuda, MD

Chief Medical Officer

Dr. Craig Zebuda brings nearly two decades of clinical and operational leadership to Yunara Life. After graduating from Albany Medical College and completing his rigorous training at Northwell Health Manhasset, Dr. Zebuda worked as an attending emergency room physician at NYU/Winthrop University Hospital, where he met the visionary team behind CityMD Urgent Care. Recruited to be one of its founding partners, Dr. Zebuda played a pivotal role in CityMD’s journey to becoming one of the nation’s leading urgent care networks. During his tenure as one of the first medical directors, he managed a substantial team of physicians and PAs, drove clinical quality, and led expansion efforts, including launching new markets in Seattle.

Upon his return to New York, Dr. Zebuda helped to advance CityMD’s innovation strategy, as he played an instrumental part in establishing its telemedicine division. He later broadened his leadership scope as a medical director at Fidelis Care Insurance, where he championed patient advocacy and comprehensive coverage models. His expertise spans direct patient care, multi-site operations, payer relations, and healthcare innovation – experience perfectly aligned with Yunara Life’s mission to transform preventive and lifestyle medicine.

Dr. Zebuda was appointed as Chief Medical Officer not only as a true ambassador for the Yunara Lifestyle, but also for his unwavering integrity and deep respect for the trust that patients place in their healthcare providers. As the head of clinical operations, he ensures Yunara Life’s protocols remain on cutting-edge of longevity health, yet ethically grounded in the principle of “do no harm.” Beyond medicine, he is an avid outdoorsman and traveler, passionate about hiking, skiing, and diving, and has explored more than 60 countries, with a particular affinity for South America and Scandinavia.

Esther Han, DO, FACS, FACOS

Head of Hormone Optimization and Pelvic Health

Dr. Esther Han is a board-certified urologic surgeon with fellowship training in Pelvic Medicine and Reconstructive Surgery. She earned her Doctor of Osteopathic Medicine with honors from the University of North Texas Health Science Center and completed her residency in urological surgery at Detroit Medical Center. She is currently the Director of Pelvic Health at the Bladder & Bowel Institute and most recently was the Director of Pelvic Health at Texas Urology Specialists.

Dr. Han’s commitment to patient advocacy extends beyond her clinical practice. As both a Fulbright and Fogarty Scholar, she has participated extensively in global research and medical missions, providing surgical and medical care in underserved communities across Uganda, Malawi, Jamaica, China, and Guatemala. Dr. Han is recognized as both a Texas Top Doc and Top Woman in Medicine; as a well-published Key Opinion Leader in her field, she is frequently spotlighted on multiple TV, radio and podcast interviews.

As the Head of Hormone Optimization and Pelvic Health at Yunara Life, Dr. Han integrates her expertise in pelvic medicine, hormone management, and sexual wellness to deliver comprehensive, evidence-based care. She is dedicated to improving quality of life through advanced diagnostics, personalized treatment plans, and minimally invasive therapies.

Dan Frogel, MD

Board Co-Chair

Clinical & Operations Advisor

Dr. Dan Frogel brings over 20 years of healthcare leadership to Yunara Life, with a deep background in scaling innovative care models. He currently serves as CEO of Thriveworks, one of the largest outpatient behavioral health providers in the U.S., with over 400 locations across 49 states and a rapidly growing virtual care platform.

Prior to Thriveworks, Dr. Frogel was the co-founder and president of CityMD, where he led the company’s expansion to more than 180 urgent care locations across the New York and New Jersey metro areas. His leadership helped define a new standard for accessible, high-quality care and was instrumental in CityMD’s merger with Summit Health and subsequent $8.9 billion acquisition by Walgreens and Cigna-backed VillageMD, one of the largest transactions in U.S. healthcare services.

At Yunara Life, Dr. Frogel brings unparalleled expertise in healthcare operations, growth strategy, and value creation. His experience building and scaling successful, multi-site healthcare platforms is helping Yunara establish a new category at the intersection of preventive medicine, AI-powered health optimization, and luxury wellness.

Mamei Sun, JD

Board Co-Chair

Fundraising, Marketing, & GTM Advisor

Mamei Sun is a recognized leader in AI strategy, enterprise technology, and healthcare innovation. Most recently, she served as Head of AI Go-to-Market Strategy at ServiceNow, where she led global efforts to bring transformative AI products to market across multiple industries.

Previously, Mamei served as Chief of Staff to Oracle founder Larry Ellison and led marketing and brand at Oracle, where she helped drive the company’s modernization roadmap. She played a key leadership role in Oracle’s $28.3 billion acquisition of Cerner Health, overseeing product marketing and strategy for one of the largest deals in health tech history.

In addition to her executive roles, Mamei is an active advisor and investor in early-stage technology companies, with a focus on AI, digital health, and enterprise SaaS. At Yunara Life, she brings unmatched expertise at the intersection of cutting-edge technology and healthcare delivery, helping shape a scalable, intelligent wellness platform designed for the future.

Lily Page

Sales & Strategic Advisor

Lily is a seasoned fintech executive with deep expertise in venture banking and embedded payments. As Head of Embedded Payments at SVB, a division of First Citizens Bank, she leads efforts to build scalable financial infrastructure for high-growth startups. Her work empowers companies to integrate payments seamlessly into their platforms.

Lily specializes in helping founders navigate complex payments ecosystems and brings insight into banking, payments architecture, and revenue enablement, ensuring early-stage companies are set up for long-term success. Her experience spans multiple industries and funding stages.

At Yunara Life, Lily advises on payments strategy and financial operations, aligning infrastructure with product and business goals. Her guidance supports secure, scalable systems that drive user trust and growth. She brings a practical lens to innovation, grounded in years of hands-on industry leadership.

Rex Chou

Brand & Consumer Strategy Advisor

Rex is a brand visionary with deep expertise in modern consumer engagement and direct-to-consumer (DTC) strategy. He currently serves as Director of Brand at e.l.f. Cosmetics, where he drives innovative campaigns and omni-channel growth. His approach blends creative excellence with data-driven brand performance.

Previously, Rex was the Global Marketing Director at L’Oréal, leading international brand initiatives across diverse markets. He later founded Ghost Democracy, a clean skincare brand built for the modern consumer, where he applied his passion for transparency and digital-first storytelling. His work spans legacy brands and disruptive startups alike.

At Yunara Life, Rex provides strategic guidance on brand positioning, consumer engagement, and go-to-market execution. His insight helps craft a cohesive, authentic brand experience across digital and physical touchpoints. With Rex’s leadership, Yunara is building a brand that resonates and endures.

Sebastijan Orlić, PhD

Scientific Advisor

Sebastijan is the founder of Quality of Life (QoL), a consulting firm specializing in evidence-based longevity and performance medicine. With a strong foundation in sports nutrition, he has served as the nutritionist for the Croatian Olympics Committee, supporting elite athletes with science-backed strategies. His expertise combines rigorous research with practical health optimization.

At Yunara Life, Sebastijan brings a data-driven approach to enhancing wellness through personalized protocols. He focuses on integrating biological age testing and other advanced metrics into daily health routines, enabling measurable improvements. His work helps translate complex science into actionable, sustainable lifestyle changes.

As a trusted advisor, Sebastijan guides Yunara’s health optimization framework, ensuring it aligns with cutting-edge longevity research. His perspective bridges athletic performance and long-term wellbeing, creating a holistic path to vitality. Through his leadership, Yunara advances personalized, evidence-based care for every user.

Ruth Ku

Financial Strategy & Fundraising Advisor

Ruth Ku is an accomplished finance executive and exited founder with more than two decades of experience in strategic finance, entrepreneurship, and operational leadership. She co-founded Bookkeep, an automated accounting platform that streamlined financial workflows for modern businesses, and helped lead the company through two successful venture fundraises. Prior to that, she held senior finance roles at ShopKeep (acquired by Lightspeed for $440 million), Ellevest, and Signpost, where she oversaw financial operations and planning during Ellevest’s rapid expansion to managing more than $2 billion in assets and serving hundreds of thousands of clients nationwide. Throughout her career, Ruth has guided multiple companies through fundraising, rapid growth, and successful exits.

At Yunara Life, Ruth serves as the Financial Strategy & Fundraising Advisor, bringing her deep expertise to help position the company for fundraising, growth, and scale. She continues to mentor founders and champion financial literacy within the wellness and longevity economy.

Michael Wolfeld, MD

Medical Aesthetics Advisor

Dr. Michael B. Wolfeld is a double board-certified plastic surgeon and nationally recognized leader in aesthetic and regenerative hair restoration. He serves as Aesthetics Advisor to Yunara Life, guiding our integrative approach to beauty, wellness, and longevity through evidence-based and ethical aesthetic care.

Dr. Wolfeld is an Assistant Clinical Professor of Plastic Surgery at the Icahn School of Medicine at Mount Sinai and the first physician in the United States to be certified by both the American Board of Plastic Surgery and the American Board of Hair Restoration Surgery. In his Park Avenue practice, he specializes in cutting-edge hair restoration techniques, including robotic FUE, PRP therapy, and regenerative modalities.

Known for his patient-centered philosophy, Dr. Wolfeld has appeared on major media outlets including The Today Show, Good Morning America, and The Dr. Oz Show, and is widely regarded as one of the most trusted aesthetic surgeons in New York City. His collaboration with Yunara Life reflects a shared vision: merging science, artistry, and compassion to elevate human well-being.