Certified Guaranty Company
Justin Unterwagner is a skilled professional in the field of grading and authentication, currently serving as a Trading Card Grader and eBay Authenticator at Certified Guaranty Company since March 2021, and as a Sports Cards Authenticator for eBay since January 2022. Prior experience includes roles as a Field Archaeologist for both government and private entities between April 2014 and March 2021, fulfilling contracts under the National Historic Preservation Act, and managing historical records and collections for Fairfax County Park Authority from September 2018 to December 2019. Justin holds a Bachelor of Science degree in Anthropology from the University of West Georgia, completed from 2010 to 2014.
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Certified Guaranty Company
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CGC is the world's largest third-party grading service for comics, magazines, concert posters and related collectibles. CGC was founded in 2000 and is a member of the Certified Collectibles Group (CCG). CGC is a fast-growing company that leads the collectibles industry through innovation, service and quality.