CID stand for Certified Interior Designer. Each state maintains its own set of criteria for awarding the CID designation. To become a certified interior designer in the Commonwealth of Virginia, the applicant must 1.) Hold a four-year degree interior design degree from an institution accredited by The Council for Interior Design Accreditation 2.) Have two years of monitored experience 3.) Have passed the examination for certification as an interior designer administered by the National Council for Interior Design Qualification (NCIDQ)