Sam Jeng Mun is a clinical psychologist, who is currently a member of the Malaysian Society of Clinical Psychology. She mainly does psychological assessments, diagnosis, and treatment of mental disorders. Her professional experiences include practicing as a clinical psychologist in private and government hospitals. She has also been lecturing in a private medical university since year 2013.

Jeng Mun has worked with a variety of populations including children with neurodevelopmental disorders, children and adolescent with emotional and behavioral issues as well as adults who experiences emotional difficulties such as depression and anxiety. She has conducted various talks to corporate companies and the public targeting mental health awareness. Jeng Mun is currently pursuing her Ph.D in UPM, focusing on depression and anxiety among the primary care level attendees.