Originally from Montreal, Dr. Joos completed her medical school at McGill University where she obtained her M.D.C.M degree. She then underwent general surgery residency at Laval University, in Quebec City, from 2007 to 2012. From 2012 to 2014 she completed a Trauma and Surgical Critical Care fellowship at the University of Southern California/Los Angeles County Hospital. She then joined the group of trauma surgeons at Vancouver General Hospital. She completed a Masters in Global Health Policy at the London School of Hygiene and Tropical Medicine in 2019. She has been working with Médecins Sans Frontières since 2015 and was deployed several times in Sub-Saharan Africa. In 2017 she completed her Emergency Response Unit training with the Canadian Red Cross and is now on the roster for deployment. Dr. Joos is the Associate Director of the UBC Branch for International Surgical Care and the Trauma and Acute Care Surgery Fellowship program director.

Dr. Joos is a fellow of the Royal College of Surgeons of Canada in General Surgery and obtained her Critical Care accreditation from the Royal College in 2014. She is a Fellow of the American Board of Surgery.

Dr. Joos is a course director for the Advanced Surgical Skills for Exposure in Trauma, the Definitive Surgical Trauma Care and the Advanced Trauma Life Support courses. She is the provincial chair for ATLS in British Columbia.

In collaboration with Medecins Sans Frontieres, Dr. Joos has created the VitalSurg training program in 2019, a surgical task-sharing program aiming to upskill medical doctors in essential surgical skills. It has launched in Aweil, South Sudan, with plan to launch in Kajo Keji, Abyei (South Sudan) and, in the future, Central African Republic and DRC. Dr. Joos is passionate about capacity-building in surgery and wishes to collaborate with any surgical provider interested in the delivery of surgical care in low resource settings.