From 1995 to 1999 he served as the Director of Cytogenetics Services and Associate Clinical Professor with the Departments of Pathology, Pediatrics, OB/GYN, and Genetics at Duke University Medical Center.

Working in conjunction with the Ministry of Health and the Environmental Quality Authority, PMNH is developing new ways to educate and empower women to create a healthier environment that increases local productivity via ecotourism, permaculture, and home-based projects.

Volunteers and grant funding have enabled PMNH to develop educational modules for youth and adults to help them protect endangered ecosystems.

Employing interactive and experiential approaches to learning, the museum organises exhibits, nature-oriented field trips, and botanical and community gardens.

[citation needed] He has been interviewed by The Washington Post, The New York Times, and The Boston Globe, as well the CNBC and ABC news networks.

[citation needed] Since 2003 he has served as Vice President of the Middle East Crisis Committee and in 2000 he cofounded al-Awda, the Palestine Right to Return Coalition, where he was national treasurer and media coordinator until 2004.

Past lecture topics range from human rights, Palestinian resistance and empowerment, the Israeli-Palestinian Struggle, and the one state solution.

In 2020, Qumsiyeh was a laureate of the Paul K. Feyerabend Award, which honors exceptionally successful work for solidarity within or between communities and acknowledges remarkable accomplishments that represent a true source of inspiration.

[citation needed] Arab World Books included him in their March 2008 selection of writers "who have enriched our pages with their creative writings and enlightened us with their progressive thinking".