Dr. Sondheimer is a clinical and metabolic geneticist. He completed his subspecialty training at The Children’s Hospital of Philadelphia. He is an Associate Professor at the University of Ottawa in the Department of Paediatrics and is on the medical staff of The Children’s Hospital of Eastern Ontario (CHEO). His research has focused on therapies for inborn errors, newborn screening, and the impact of mitochondrial DNA sequence variants on common and rare disease. Dr. Sondheimer joined NSO in 2024.

Dr. Tanya Nelson is an FCCMG Clinical Molecular Geneticist and Head of the Division of Genome Diagnostics at BC Children’s and BC Women’s Hospitals. She oversees provincial genetic and genomic diagnostic services supporting pediatric, adult, and maternal‑fetal care. A Clinical Professor in the Department of Pathology and Laboratory Medicine at the University of British Columbia, Dr. Nelson specializes in the translation and implementation of emerging genomic technologies into healthcare system settings, including through the GSBC (Genome‑wide Sequencing BC) and CAUSES initiatives. She has served on multiple committees within the Canadian College of Medical Geneticists and contributes to the development of national guidelines and policies for genomic medicine.

Dr. Tanya Nelson is an FCCMG Clinical Molecular Geneticist and Head of the Division of Genome Diagnostics at BC Children’s and BC Women’s Hospitals. She oversees provincial genetic and genomic diagnostic services supporting pediatric, adult, and maternal‑fetal care. A Clinical Professor in the Department of Pathology and Laboratory Medicine at the University of British Columbia, Dr. Nelson specializes in the translation and implementation of emerging genomic technologies into healthcare system settings, including through the GSBC (Genome‑wide Sequencing BC) and CAUSES initiatives. She has served on multiple committees within the Canadian College of Medical Geneticists and contributes to the development of national guidelines and policies for genomic medicine.

Dr. Anastasio is a clinical and laboratory geneticist at the Sherbrooke University hospital in Quebec, Canada. Following her Medical Genetics residency at McGill University, she pursued a fellowship in Laboratory Molecular Genetics in both Boston (The Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine) and Montreal (McGill University). She began practicing in 2021 and splits her time between clinical and laboratory work. Since October 2025, she is the chief of the Medical Genetics Service, Clinical and Laboratory sectors.