Answer : To become an interior and exterior designer, you will need to complete a four-year bachelor's degree in either interior design or a closely related field such as architecture. In addition to completing a rigorous course of study, you will also need to become proficient in computer-aided design (CAD) software and have strong drawing skills. After graduation, many designers choose to pursue voluntary certification through the National Council for Interior Design Qualification (NCIDQ). Once certified, designers can work in a variety of settings including residential, corporate, healthcare, hospitality, and retail environments. Some designers also choose to open their own design firms.