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.


Consumer Services

Certified Guaranty Company

Matt Nelson

Erin Lavarello

Grayson Kirkham

Joe Martin

Matt Corrado

Summer Slowik

Sterling Gadd

Kris Kudenholdt

Jonathan Snyder

Joelle Gordon

Jim M.

Alex Domsky

Nick Conti

Joshua Gray

Susan Lulgjuraj

Mike Greenwood

Amber Grissom

Jonathan Khan

CGC Marketing

Grading and Verification

Marketing and Communications

CGC Marketing

Team members

Other teams at Certified Guaranty Company

Grading and Verification

Marketing and Communications