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Our Team

A Team United by Care

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 around how we handle your personal data is guided by people 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, DipACLM
Marcus Dillavou, MEng
Craig Zebuda, MD, DipABLM
Esther Han, DO, FACS, FACOS
Bernard Chang, MD, PhD, MBA
Harry Pino, PhD
Ana Catalina Guzmán
Lina Soley Rocha, RN, LE
Junhak Pae, LMT
Thunyatorn Ng, LC
Erika Chen, FNP-BC, DipACLM
Marcus Dillavou, MEng
Craig Zebuda, MD, DipABLM
Esther Han, DO, FACS, FACOS

Dan Frogel, MD

Board Co-Chair

Clinical & Operations Advisor

Read Bio
Erika Chen, FNP-BC

Board of Advisors

We are so grateful to be working closely with our incredibly accomplished and brilliant board of  advisors who have successfully founded, scaled, managed, and exited companies in the health,  tech, and consumer product industries.

Dan Frogel, MD
Mamei Sun, JD
Lily Page
Rex Chou
Sebastijan Orlic, PhD
Ruth Ku
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Erika Chen

Founder, Chief Executive Officer, Chief Alignment Officer

Erika Chen, FNP-BC, DipACLM is the founder of Yunara Life, a technology-driven lifestyle medicine and longevity ecosystem designed to bridge the gap between healthcare and self-care. A double board-certified nurse practitioner and Diplomate of the American College of Lifestyle Medicine, she combines deep clinical expertise with strong business and consumer strategy experience.  Erika spent 15 years working across the ICU, emergency medicine, and primary care, witnessing firsthand the limitations of a healthcare system built primarily to treat disease rather than prevent it.

Prior to founding Yunara Life, Erika launched LIC Lifestyle & Beauty, a lifestyle medicine and aesthetics clinic that quickly grew into a thriving practice serving hundreds of patients seeking both aesthetic and wellness services. She also held administrative and clinical roles during the growth phase of One Medical prior to its IPO and acquisition by Amazon, where she worked closely with engineers and product managers to streamline digital health products and scale technology-enabled, patient-centered care.

Erika earned her BBA in Marketing from Texas A&M University and her BSN and MSN in Nursing from Columbia University, and completed a fellowship in emergency medicine. As Chief Executive Officer of Yunara Life, Erika leads the company’s strategic growth with an entrepreneurial vision shaped by her experience across medicine, consumer health, and technology. In her role as Chief Alignment Officer, she ensures 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, MEng

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 co-founded VIPAAR (now HelpLightning, with over 70,000 users in 80+ countries), where he pioneered augmented reality solutions for remote surgery and clinical training and holds five patents related to these innovations. 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 T. Zebuda, MD, DipABLM

Chief Medical Officer

Dr. Craig Zebuda is a double board-certified physician and Diplomate of the American Board of Lifestyle Medicine who brings nearly two decades of clinical, academic, and operational leadership to Yunara Life.

After earning his medical degree from Albany Medical College and completing his emergency medicine residency at Northwell Health Manhasset, Dr. Zebuda served as an attending emergency physician at NYU Winthrop University Hospital before becoming one of the founding physicians at CityMD. As one of the organization’s first Medical Directors, he helped build CityMD into one of the nation’s largest urgent care networks, leading physicians and physician assistants, driving clinical quality, and supporting rapid expansion across multiple markets.

He later led CityMD’s Seattle expansion before returning to New York to help launch the organization’s telemedicine division. He subsequently served as Medical Director at Fidelis Care, where he advanced patient-centered, value-based care initiatives. His experience spans clinical leadership, healthcare innovation, multi-site operations, and payer strategy. He has also served as Assistant Professor of Emergency Medicine at Stony Brook University and Assistant Professor of Medicine at Weill Cornell Medicine, mentoring future physicians while advancing evidence-based care.

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.

Bernard Chang, MD, PhD, MBA

Chief Scientific Officer

Dr. Bernard Chang is a physician-scientist, entrepreneur, and nationally recognized leader in clinical research and behavioral medicine. He serves as Vice Chair of Research in the Department of Emergency Medicine at Columbia University Irving Medical Center and Associate Dean of Faculty Health and Research Career Development at Columbia University Vagelos College of Physicians and Surgeons, where he helps lead research strategy and translational innovation across one of the nation’s top academic medical institutions.

Dr. Chang’s work focuses on improving prediction and prevention of major health risks, including stroke, mental health disorders, and suicidal behaviors, through behavioral science, epidemiology, and emerging technologies such as machine learning. He has authored more than 70 peer-reviewed publications and led multiple studies funded by the National Institutes of Health, placing him among the top NIH-funded scientists in emergency medicine.

In addition to his academic leadership, Dr. Chang is a digital health entrepreneur and previously co-founded Mighty Health, a personalized nutrition, exercise, and daily health platform backed by Y Combinator and leading venture investors. He earned degrees from Cornell University, Harvard University, and Stanford University School of Medicine, completed his residency at Brigham and Women’s Hospital and Massachusetts General Hospital, and later earned an Executive MBA from Saïd Business School. At Yunara Life, he helps guide the company’s scientific and research strategy as it develops evidence-based lifestyle medicine programs to improve long-term health outcomes.

Harry Pino, PhD

Director of Human Performance and Exercise Physiology

With more than 33 years of experience in exercise physiology, sports performance, and preventive health, Dr. Harry Pino leads Yunara Life’s Human Performance program, helping patients optimize strength, longevity, and quality of life through precision exercise science and lifestyle medicine. Before joining Yunara Life, Dr. Pino served as Manager of Exercise Physiology at Princeton Longevity Center, where he developed the center’s Human Performance program. Board certified by both the American Society of Exercise Physiology and the American College of Sports Medicine, he is recognized for his expertise in cardiopulmonary exercise testing, VO₂ max assessment, metabolic performance, and personalized exercise prescription.

Throughout his career, Dr. Pino has served as Director of Clinical Exercise Physiology at Tufts Medical Center, Senior Exercise Physiologist at NYU Langone Health’s Sports Performance Center, and founder of VO₂max Medical, LLC. He has worked with everyone from individuals seeking to improve their long-term health to professional and Olympic athletes pursuing peak performance. A respected voice in exercise physiology and preventive health, Dr. Pino has been featured on The Today Show, Good Morning America, PBS, CBS, CNN, and The Oprah Winfrey Show. His expertise has also appeared in The New York Times, The Wall Street Journal, Men’s Health, and Shape. In 2026, he was recognized in Top Latinos, a prestigious honor celebrating outstanding Latino professionals across the United States.

At Yunara Life, Dr. Pino brings decades of experience and a passion for innovation to building a next-generation human performance program that helps patients build resilience, preserve physical function, and extend their healthspan.

Ana Catalina “Cata” Guzmán

Head of Product

Ana Catalina “Cata” Guzmán serves as Head of Product at Yunara Life, where she leads the design and development of the company’s digital platform. With a background in product design engineering and agile product development, she specializes in transforming complex ideas into intuitive, user-centered digital experiences that align product strategy, design, and technology.

Cata brings a multidisciplinary perspective shaped by her experience as both a startup founder and product leader. Prior to Yunara Life, she founded AINGO Technologies, where she led the development of software products and managed cross-functional teams across international markets. Most recently, she served as Product Owner at Pangi Care Corporation, guiding the development of a digital health platform through agile product strategy, UX/UI design, and user journey optimization.

Originally from Medellín, Colombia, Cata is fluent in both English and Spanish and brings an international perspective to product development and team collaboration. She earned her engineering degree from Universidad EAFIT, one of Colombia’s leading universities for engineering and innovation, where she was recognized for outstanding academic performance and multiple award-winning design projects. She also previously served as an adjunct professor at Universidad Católica de Oriente, teaching creativity, innovation, and business model development.

At Yunara Life, Cata leads product strategy, helping to translate the company’s vision to bridge the gap between healthcare and self-care into a seamless and engaging user experience.

Lina Soley Rocha, RN, LE

Aesthetics & Wellness Manager

Lina Rocha is an experienced aesthetic nurse and licensed esthetician with a passion for helping patients achieve healthy, natural-looking results through evidence-based aesthetic care. Her approach combines clinical precision with an artistic eye, emphasizing personalized treatment plans, patient education, and long-term skin health.

Before her career in aesthetics, Lina worked as both a hospital bedside nurse and nurse manager in a mental health clinic, caring for patients while also leading clinical operations and multidisciplinary teams to ensure the highest standards of safety and quality. Lina is also a healthcare attorney who spent 12 years leading her own law firm in Colombia, specializing in medical law, labor law, and healthcare administration. This uncommon combination of legal and clinical experience has shaped her thoughtful approach to patient advocacy, informed decision-making, and delivering care with integrity.

As Yunara Life’s Aesthetics & Wellness Manager, Lina is committed to creating an elevated patient experience where every treatment is personalized, evidence-based, and centered on the individual’s goals. She is passionate about helping patients look and feel their best while fostering lasting confidence through compassionate, high-quality care.

Junhak Pae, LMT

Lead Therapist, Restorative & Manual Medicine

Junhak Pae serves as Lead Therapist of Restorative & Manual Medicine at Yunara Life, where he combines therapeutic bodywork, traditional East Asian medicine, and decades of movement expertise to help patients recover, restore function, and support lifelong physical well-being.

His path to healthcare is both unique and deeply rooted in holistic wellness. Before entering clinical practice, Junhak spent time as a Daoist monk in Korea and later became a Grandmaster in Taekwondo and Tai Chi, as well as a master of Qigong. In Korea, he practiced acupuncture as well as “Hwal-beob” manual medicine, a traditional Korean system of musculoskeletal manual therapy, developing extensive expertise in movement, pain management, and restorative care.

Rooted in the principles of traditional East Asian medicine, Junhak integrates meridian-based therapies with modern manual techniques, using acupressure and personalized bodywork to relieve pain, restore mobility, improve circulation, and support the body’s natural healing processes. He is an expert in deep tissue massage, cupping therapy, gua sha, lymphatic drainage, and prenatal massage. As one of Yunara Life’s founding clinical team members, Junhak is helping elevate therapeutic bodywork as an essential component of preventive healthcare, empowering patients to recover more effectively, move with greater ease, and perform at their best throughout life.

Thunyatorn Ng, LC

Lead Cosmetologist

Thunyatorn Ng is a licensed cosmetologist with nearly a decade of experience in skincare, beauty, and wellness. She is known for her meticulous attention to detail, calming presence, and personalized approach to care, creating elevated experiences that help clients look and feel their best.

Her expertise includes restorative facials, therapeutic facial massage, facial waxing, advanced skincare treatments, as well as hair and scalp wellness. She is passionate about the connection between relaxation and overall well-being, incorporating techniques that promote circulation, relieve facial tension, and support healthy, radiant skin while creating a deeply restorative experience.

At Yunara Life, Thunyatorn leads our cosmetology services, helping members integrate restorative self-care into a broader longevity-focused lifestyle. She is dedicated to delivering thoughtful, results-driven treatments that support healthy aging, confidence, and lifelong wellness.

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.