Roeslan is an Assistant Professor in Psychodiagnostics at Open Universiteit, where he has been actively involved in course development, study material composition, and student supervision for over 9 years. Previously, he served as an Assistant Professor in Life Span Psychology, contributing to advanced research activities. With a background in research, including a PhD thesis on depression care programs in nursing homes, Roeslan has made notable contributions to the field of psychology during his academic career.