This document summarizes a study on ethical decision making in user experience (UX) design practice. It documents three case studies of UX designers with different levels of experience and organizational roles. Through observations and interviews, it identifies themes in their individual practices, how organizational factors influence their work, and how they navigate ethical issues. It frames UX designers as "ethical mediators" who must balance multiple constraints and priorities. The study aims to understand designers' roles in ethical decision making and develop methods to strengthen ethical awareness and action in the field.