Interior design PhD programs offer the best form of education available. Individuals who complete these programs typically aspire to work in research, post-secondary teaching, or advanced business functions. In addition to completing a series of highly specialized courses, students also conduct research and write a comprehensive dissertation on a niche topic in the discipline.Most programs take 3-5 years to complete on a full-time basis, although part-time options also exist. These programs go beyond masters courses and equip students with the skills they need to serve as leaders and educators.Below are three potential career paths you can take with a PhD.