Our Team

Shelby Tyler is the Chief Operating and Financial Officer at KeraLink International, where she has dedicated more than 20 years to advancing the organization’s mission. Inspired by the impact KeraLink has had in expanding access to vision care for countless individuals, she brings extensive financial and operational expertise to strengthen the organization’s programs and long-term sustainability.

Shelby began her career at Johns Hopkins University, where she optimized resource allocation and enhanced cross-departmental collaboration. She went on to support operations at Ford Motor Credit and Sheppard Pratt, broadening her experience in finance and operations before joining KeraLink.

She holds a B.S. in Accounting and an M.S. in Finance from Notre Dame of Maryland University.

Outside of Work

Outside of work, Shelby loves exploring new places, collecting passport stamps, and turning every trip into an adventure.

Mark Clark is the Director of Eyewear at KeraLink, where he leads the launch of an e-commerce eyewear line to financially support the organization’s mission. With over 23 years of experience in the eyecare industry, Mark leverages his expertise to maximize both the impact and profitability of KeraLink’s direct-to-consumer eyewear initiative.

Passionate about global access to eyecare, Mark is dedicated to eliminating eye health deserts in the U.S. and abroad. He was drawn to KeraLink by the opportunity to combine his two greatest passions—eyecare and serving underserved communities—into meaningful, mission-driven work.

Mark holds an MBA in Healthcare Administration and a DBA in Organizational Leadership.

Fun fact: On a road trip, Mark is jamming to 80s Top 40 and 90s pop hits.

Outside of Work

Outside of work I enjoy rescuing wild mustangs, and raising Nigerian Dwarf goats. A good weekend for me is any weekend doing chores and projects around the farm.

David Green has worked with many organizations to make medical technology and health care services sustainable, affordable, and accessible to all. He is a MacArthur Fellow, Ashoka Fellow and is recognized by Schwab Foundation as a leading social entrepreneur. David played a key role in the establishment and development of Aurolab (India), to produce affordable intraocular lenses. Aurolab has 10% of the global market share; over 40 million have had their vision restored via an Aurolab lens. He also developed suture manufacturing at Aurolab.  David is now CTO at KeraLink International, after serving a stint as interim CEO.  KeraLink addresses corneal disease and blindness with technology solutions.  He co-founded Sound World Solutions, a social enterprise to make affordable hearing devices with a novel fitting; LegWorks, which makes high quality prosthetic knees affordable; and the Eye Fund, a $15M social investing fund in collaboration with Deutsche Bank, Ashoka and International Agency for Prevention of Blindness. He worked with Pacific Vision Foundation to establish an eye institute serving all in N. California; and was a vice president at Ashoka for 10 years. He was the chief architect of Medtronic’s Healthy Heart for All initiative in India. He is a consultant to the World Health Organization in eye care and reducing costs of medical products. He cofounded Alina Vision, a social enterprise that develops  affordable eye care in Vietnam.   He is on the faculty of Johns Hopkins Wilmer Eye Institute; is a recipient of 2009 “Spirit of Helen Keller” award for humanitarian efforts in blindness prevention; was awarded 2009 University of Michigan Humanitarian Service Award; and was selected by University of Michigan Engineering students as a leading social entrepreneur alumnus. In 2011 he received the Certificate of Honorary Award of Liaoning Province as a foreign expert who has made great contributions to the economic and social development of Liaoning Province. He is on the boards of the University of Michigan School of Business Social Venture Fund.  He graduated from the University of Michigan with a Bachelor in General Studies (1978) and a Master’s degree in Public Health (1982).

David Green is a MacArthur Fellow, Ashoka Fellow, and Schwab Foundation Social Entrepreneur recognized for making medical technology and health care affordable and accessible globally. He helped establish Aurolab (India), which supplies 10% of the world’s intraocular lenses—restoring sight to over 40 million people—and developed its suture manufacturing line.

As CTO of KeraLink International, he leads technology solutions addressing corneal disease and blindness. David co-founded Sound World Solutions (affordable hearing aids), LegWorks (low-cost prosthetic knees), and the Eye Fund, a $15 million social investment partnership with Deutsche Bank, Ashoka, and IAPB. He also co-founded Alina Vision to expand affordable eye care in Vietnam and helped launch Medtronic’s Healthy Heart for All in India.

He has advised the World Health Organization, served as Vice President at Ashoka, and was instrumental in founding the Pacific Vision Foundation Eye Institute in California. David is on the faculty of the Johns Hopkins Wilmer Eye Institute and the University of Michigan Social Venture Fund board. He holds a BGS (1978) and MPH (1982) from the University of Michigan.

David Green is a MacArthur, Ashoka, and Schwab Foundation Fellow recognized for making medical technology and health care affordable worldwide. He co-founded Aurolab (India), which supplies 10% of global intraocular lenses, restoring sight to over 40 million people. As CTO of KeraLink International, he develops technologies to prevent and treat corneal blindness. David also co-founded Sound World Solutions, LegWorks, Alina Vision, and the Deutsche Bank Eye Fund. A consultant to the World Health Organization and faculty member at Johns Hopkins Wilmer Eye Institute, he holds degrees in Public Health and General Studies from the University of Michigan and was awarded their Humanitarian Service Award.

David Green is a MacArthur, Ashoka, and Schwab Foundation Fellow dedicated to making medical technology and health care accessible to all. He pioneered sustainable social enterprise models that combine affordability, innovation, and impact—most notably through Aurolab (India), which produces 10% of the world’s intraocular lenses and has restored sight to over 40 million people. As CTO of KeraLink International, he leads technologies to prevent and cure corneal blindness. David also co-founded Sound World Solutions, LegWorks, Alina Vision, and the Deutsche Bank Eye Fund, and advises the World Health Organization on strategies to reduce global blindness and health-care costs.

David Green is a MacArthur and Ashoka Fellow recognized for making medical technology affordable and accessible worldwide. As CTO of KeraLink International, he advances solutions for corneal blindness and has founded multiple social enterprises, including Aurolab, Sound World Solutions, and LegWorks, transforming millions of lives through compassionate innovation.

David Green is a social entrepreneur dedicated to ensuring everyone can see, hear, and walk with dignity. A MacArthur and Ashoka Fellow, he has created affordable innovations like Aurolab, LegWorks, and Sound World Solutions. As CTO of KeraLink International, he develops technologies to restore vision and transform lives worldwide.

Aaron Chang is the Director of Product Development at KeraLink, where he focuses on the discovery, development, and deployment of technologies that prevent, early detect, and provide novel treatments for corneal diseases. With over 10 years of experience in medtech hardware and software, he has worked across seed to acquired Series C startups and consulted for major multinational medical device manufacturers.

Aaron was drawn to KeraLink by his personal mission to raise global standards in healthcare, education, and human rights. Witnessing the disparity in access to prompt, sight-saving corneal care—where even a pet in the U.S. can receive treatment in a day—motivated him to contribute to solutions for people in low- and middle-income countries.

He holds a BS in Biomedical Engineering, an MSE in Bioengineering Innovation and Design, and a Global Executive MBA from Duke University’s Fuqua School of Business.

Fun fact: On a road trip, Aaron is jamming to lo-fi covers, NF, and Michael Bublé.

Outside of Work

Outside of work, Aaron cheers on Duke basketball and captures the world through his camera lens.

Jeff Soulliere is the Director of Strategic Partnerships and Initiatives at KeraLink International, where he leads high-impact programs to combat corneal blindness in underserved communities. With over a decade of experience in global health, strategy, and partnerships, he drives innovative, data-informed collaborations that strengthen local health systems and advance vision equity.

Jeff previously held senior roles at OneSight EssilorLuxottica Foundation, building global procurement frameworks and expanding access to care. Recognized as an Eye Health Hero by IAPB, he excels in cross-sector leadership, program design, and scaling sustainable solutions.

He was drawn to KeraLink by the opportunity to combine his passion for strategic partnerships with meaningful impact in eye health. After more than a decade in vision care, Jeff wanted to join an organization willing to challenge the status quo and invest in bold, scalable solutions for the world’s most vulnerable.

Jeff holds a B.B.A. in Marketing from Saginaw Valley State University and is an Eye Health Hero – Innovation Category.

Fun fact: On a road trip, Jeff’s playlist spans late ’90s rap, alternative rock, pop, country, and now plenty of Disney classics and cartoon theme songs—dad life is in full effect.

Outside of Work

Outside of work, nothing brings me more joy than spending time with my girls—my wife Ashley and our two daughters, Reagan and Riley. Whether we’re out exploring trails in the Jeep, off-roading through Michigan’s backroads, or just enjoying the outdoors together, those are the moments that make me feel most alive. Family is everything to me, and getting to share adventures with them—big or small—is what keeps me grounded and grateful every day.

Chelsea Andrews serves as the Programs & Partnerships Manager at KeraLink International, where she collaborates with direct-service providers around the world to document impact and drive program growth. With a background in nonprofit leadership, civic engagement, and international partnerships across Israel, Palestine, and the U.S., she brings a collaborative, equity-centered approach to her work.

A passionate advocate for the prevention of violence against women and community-led solutions, Chelsea plays a vital role in advancing KeraLink’s mission to scale innovative eye health initiatives across low- and middle-income countries.

Chelsea was drawn to KeraLink by a personal connection: her maternal grandparents were both blind. Growing up, she respected blind culture—the resilience, challenges, and community—but her grandmother’s blindness was preventable, a reality that continues to inspire her work.

Fun fact: On a road trip, Chelsea is jamming to Taylor Swift. #TTPD

Outside of Work

Outside of work, I love working on a crafty project, often around my home or repainting a room. I’m also a huge fan of intergroup work which merges differing viewpoints.

Hollie Oney is the Marketing Associate at KeraLink, where she brings creativity and passion to communication, marketing, and graphic design. She enjoys connecting with people through innovative campaigns that share KeraLink’s mission and impact with a wider audience.

Hollie was drawn to KeraLink by the opportunity to use her skills to make a tangible difference in global eye health and to help bring sustainable solutions to communities in need.

She holds a BS in Corporate Communication with a focus in Marketing from the University of Texas at Austin.

Fun fact: On a road trip, Hollie is jamming to Noah Kahan and worship music.

Outside of Work

Outside of work, Hollie loves discovering new coffee shops and capturing life’s little moments through her camera lens.

Carolyn is a Development Associate at KeraLink, supporting the team in creating a future where no individual is denied the right to sight. She brings experience from her previous roles with Clean Water Action and the National Council for Adoption, where she honed her skills in prospect management, donor database maintenance, and creating compelling development materials.

Carolyn is passionate about connecting people to the causes they care about to drive meaningful change. She was drawn to KeraLink by the organization’s mission to end preventable corneal blindness and ensure that sight is accessible to all, regardless of where they were born.

A proud alumna of Columbia University, Carolyn graduated cum laude with a BA in History. During her time on campus, she was active with the Columbia Turkish Students Association and Phi Theta Kappa Honor Society, and could often be found cheering on Columbia’s hockey team.

Fun fact: On a road trip, Carolyn’s playlist mixes nostalgic favorites from the ’70s and ’80s with ’90s and 2000s country—and every trip must include some ABBA.

Outside of Work

Outside of work, Carolyn is a Florida native who feels most at home near the water, soaking up the sunshine and spending quality time with friends and family rooting for the Tampa Bay Bucs & the Lighting!

Allie Sibole is the Principal Engineer at KeraLink, where she designs, builds, and evaluates new technologies to prevent and treat corneal blindness. With ten years of experience in the medical device field, she has developed innovative products for Medtronic, Johnson & Johnson, and PATH, including minimally invasive surgical devices, orthopedic implants, vaccine carriers, and newborn vital signs monitors.

Allie is passionate about making health technologies—and STEM careers—accessible to all. She was drawn to KeraLink by the organization’s focus on innovation in cornea care and a technology team with a proven track record of implementing successful healthcare solutions worldwide.

She holds an MSE in Bioengineering Innovation and Design from Johns Hopkins University and a BS in Bioengineering from Santa Clara University.

Fun fact: On a road trip, if her toddler is in the car, Allie is jamming to Disney hits and endless renditions of The Wheels on the Bus; otherwise, her playlist mixes rock and pop hits from the 2010s.

Outside of Work

Outside of work, I enjoy running, reading, baking, trivia, and exploring the outdoors with my family.

Donna Smith is the Executive Assistant at KeraLink, bringing over 30 years of experience in nonprofit executive and administrative support. She has been with KeraLink for 24 years, starting in 2001 as a secretary and certified Office Administrator. Donna is also a Notary Public in the state of Maryland.

She has dedicated more than two decades to KeraLink because she believes deeply in the mission to eliminate preventable blindness.

Education & Certifications: Business School graduate | Notary Public

Fun fact: In the summer, Donna can be found by the ocean with her grandson Zion, jamming to Heather Hedley and Ledisi.

Outside of Work

Outside of work, I love talking to people about our Creator, exploring nature and being by the ocean in the summertime.