Rinker is a principal in Rinker Enterprises, Inc., a firm specializing in providing consulting, editorial, educational, photographic, research, and writing services in the antiques and collectibles field. The company’s headquarters is located in the former Vera Cruz (Pennsylvania) elementary school. In addition to a staff of qualified researchers, Rinker Enterprises draws regularly on the expertise of advisors located throughout the United States and Canada.

Rinker now hosts Pop Nation on HGTV and hosted Collector Inspector, a weekly show devoted to seeking out antiques and collectibles in private homes, on Home & Garden Television (HGTV).  The show debuted on October 4, 2002.  Collector Inspector began its third season on April 3, 2004.  Rinker also is featured in two HGTV specials—2003 Endless Yard Sale (first aired on September 21, 2003) and Collectibles: Coast to Coast (aired on March 20, 2004).