Leslie's work is shaped by both formal training and lived experience. She studied biology, philosophy, and medicine at Johns Hopkins University, King's College London, and Temple University School of Medicine, drawn early on to questions about how people make meaning when life becomes uncertain.

After the birth of her three children, Leslie was diagnosed with triple-negative breast cancer. Two years later, she became a caregiver to her daughter during a brain cancer diagnosis. Moving through cancer as a physician, a patient, and a caregiver gave her a rare and holistic perspective on the emotional, relational, and psychosocial impact of a diagnosis, not only on the individual but on families and entire support systems.

Today Leslie works with people navigating cancer at any stage, creating a safe, steady container where emotions can be felt, stories can be told, and meaning can take shape. Her work is grounded, spacious, and deeply human. It is about helping people live well on their own terms, even in the midst of uncertainty, change, and loss.