Roos has a background in both Psychology and Human Computer Interaction, and is passionate about improving sexual health through research and design, using technology. Roos drives the user interaction design, implementation and testing of the SEQUENCE digital e-sexual health clinic web-app, to ensure the end-product will be as usable and inclusive as possible. This includes interviewing people to identify core user experiences and needs for future service users, as well as prototyping user interfaces and evaluating user interactions.