Lewis Greer Zirkle Jr.

Lewis Greer Zirkle Jr (born July 23, 1940) is a board-certified orthopaedic surgeon known for developing surgical implants and curriculum for fracture care in low- and middle-income countries, or LMICs. Born in Pittsfield, Massachusetts, Zirkle attended Davidson College and Duke University School of Medicine. During his time in Medical School, he was drafted into the United States Army and served as an orthopaedic surgeon during the Vietnam War.

On January 29th, 1999, Zirkle founded SIGN Fracture Care International (SIGN), a 501(c)(3) non- profit organization, aimed at aiding orthopaedic surgeons and patients in LMICs. Between 1972 and 2019, he traveled to 35 countries to teach surgery and orthopaedic care. In 2018 he was awarded the Department of Defense Medal for Distinguished Public Service for his work with the injured poor.