Led by Dr. April Zambelli-Weiner and Dr. Elizabeth Brooks, the TTi team includes veteran health economists, epidemiologists, biostatisticians, medical writers, reimbursement experts and more. Your projects run like clockwork when your support team is skilled, experienced and focused on your success.

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    April Zambelli-Weiner, PhDPresident / CEO
    I wake up every day excited to do what I love and make a difference. As an epidemiologist, I’m driven to do more by my passion for public health, for challenging work and for people. My decades of experience addressing some of the world’s most challenging health issues – from cancer, to birth defects, to cardiovascular disease - has made me an innovator, willing to think outside of the box to find new, cost-effective solutions for client and societal needs. I’m committed to improving health across the lifespan through application of robust scientific methods to advance prevention and improve healthcare for all people.
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    Elizabeth Brooks, PhDEVP
    To me, nothing is more rewarding professionally than collaborating with interesting, passionate, and talented individuals to advance the Triple Aim of healthcare: improved population health, improved patient experience of care, and lower per capita costs of care. As a health economist for more than 20 years, I’ve had the opportunity to contribute to the market adoption of life-saving and life-altering technologies. I thrive on new challenges and on developing innovative research solutions to demonstrate combined clinical and economic value of healthcare technologies, processes, and systems.
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    Daniel J. Weiner, DCEVP
    Nothing energizes me more than being able to solve a problem - diving into projects and providing efficient and successful solutions for clients is what inspires me on a daily basis. Over 20 years of involvement in clinical health and research has taught me how to comprehensively analyze issues and develop unique and creative solutions across a broad range of health issues. I’ve had extensive experience as a primary care provider, primarily in musculoskeletal conditions, bridging evidence gaps and developing translational tools including analysis and interpretation of the evidence base.
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    Matt Yuen, PhDSenior Scientist
    Dr. Yuen’s technical and administrative experience, including expertise in project coordination and strategic planning, provide effective tools to successfully enter new markets and strategic insight to best position your company. Matt also has a variety of health economics experience, including determining cost-effectiveness of interventions in various populations. Matt holds a Ph.D. in Health Services Policy and Management from the University of South Carolina, and an M.P.H. from Texas A&M.
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    Yolanda CullenVP, Client Services
    I was raised in a family where helping and caring about people was emphasized - community mattered. This upbringing instilled my passion for meaningful relationships and the well-being of others and a career in health care and public health was a natural fit. My 15+ years of client services and marketing experience has allowed me to work with amazing people that share my passion for helping others and improving lives. I thrive on collaborating on projects and programs that ultimately impact public health in a positive and meaningful way.