 In 1999 he obtained a Ph.D. degree in psychology from Babeș-Bolyai University with thesis "Mecanisme inconștiente de reactualizare a informațiilor," under the direction of Ioan Radu.David created the first school of cognitive-behavioral therapy (CBT) in Romania, based on international principles, recognized as such by the founders of this field such as Albert Ellis and Aaron T. Beck; he and his trainee also extended the application of CBT in education (e.g., rational-emotive & cognitive-behavioral education) and organizational fields (e.g., cognitive-behavioral coaching).He is a Fellow in the Academy of Cognitive Therapy, U.S.A. and the national representative in the Social Sciences Standing Committee at the European Science Foundation.