First began interning as an appraiser in 1975 under the direction of Donald Vogel of Valley House Gallery in Dallas, Texas. In May 1980, she formed Corinne Cain & Associates, incorporating in May, 1982 to become Corinne Cain, Ltd, a nationally recognized firm affording expert appraisal and consulting services on Fine Art and American Indian Art.

Ms. Cain is only the second Arizonan to be admitted as a Senior Member of the American Society of Appraisers in Fine Arts and the fifteenth individual internationally to earn a second designation. She wrote the examination for appraising American Indian Art in 1987, rewriting it along with Maryann L'Heureux in 1993. Since 1987 Ms. Cain has served on the International Board of Examiners of the American Society of Appraisers. In 1992 she became a Certified Appraiser of Personal Property, tested in the specialty of Limited Edition Prints through the International Society of Appraisers. She was elected to the prestigious national ASA Personal Property Committee from June 1993 to June 1996. In 1999 she helped construct the new Fine Arts exams for the American Society of Appraisers.

Ms. Cain's background in art includes a Bachelor of Fine Arts (Painting & Drawing) and a unique double Masters in Fine Arts (Arts Administration) and Business Administration (Finance) from Southern Methodist University. Ms. Cain has completed additional postgraduate work in art history at Arizona State University.

Ms. Cain's background also includes extensive study in museums throughout Great Britain, Europe and the Russian Bloc countries. She was the original director of Gallery 10, Inc. of Scottsdale, known for museum-quality American Indian art. Her appraisal apprenticeship took place at Valley House Gallery in Dallas, Texas, a gallery specializing in nineteenth and twentieth century paintings, drawings and sculpture. While in graduate school, she developed a marketing campaign for Sotheby's New York, later utilized by Sotheby’s New York.

She is listed as a qualified appraiser for the Southwest Region's Source List for the Internal Revenue Service and for the Resolution Trust Corporation. Ms. Cain has served as an expert witness in court and provides professional consultation to both individuals and to corporations. For over twenty years, Ms. Cain functioned as curator for the AP Fenderson collection of primarily American Indian art. The year 2000 marked her first year as a member of the prestigious national women's art group known as Art Table.