A distinguished Anthropologist specializing in the Philippines, Southeast Asia, America, and the Pacific, He has made significant contributions to the field through his research, presentations, and publications. Fluent in English, Tagalog, and Spanish, his linguistic skills have been instrumental in his cross-cultural examinations. Marcum has affiliations with the University of San Francisco, University of Wisconsin, Universidad de Leon, Cal Poly Humboldt, and Santa Rosa Junior College.