(NYSE:DHX) CENTENNIAL, Colo.--(BUSINESS WIRE)--DHI Group, Inc. (NYSE: DHX) announced today that ClearanceJobs Vice President of Content and Engagement Lindy Kyzer recently published her debut book Trust Me, A Guide to Secrets: Who Gets Them and Why We Have Such a Mixed Track Record with Them. Kyzer is a leading voice in national security hiring and clearance policy, and the book arrives at an unprecedented time for the national security workforce. As security clearance news continues to dominate the headl