Dr. Ortiz is Chief Clinical Officer for Marker Learning and Professor of Psychology at St. John's University, New York. He has served as Visiting Professor and Research Fellow at Nagoya University, Japan, as Vice President for Professional Affairs of APA Division 16 (School Psychology), as member and Chair of APA’s, Committee on Psychological Tests and Assessment, as member of the Coalition for Psychology in Schools and Education, as representative on the New York State Committee of Practitioners on ELL and LEP Students, and as member of APA Presidential Task Force on Educational Disparities. Dr. Ortiz has published widely on a range of topics and is a frequent presenter at professional conferences as well as an internationally recognized expert on issues involving nondiscriminatory assessment, evaluation of English learners, Cross-Battery Assessment (XBA), and specific learning disabilities. He is author of the Ortiz Picture Vocabulary Acquisition Test (Ortiz PVAT)—the first test with dual norms designed specifically for English learners and English speakers. He is also primary co-author of the Cross-Battery Assessment Software System (X-BASS v3.0), Culture-Language Interpretive Matrix (C-LIM), C-LIM+Achievement Test Extensions (C-LIM+ATE), True Peer Estimator (TPE), and co-author of the Intervention Library: Finding Resources for Students and Teachers (IL:FIRST v1.0). His books include “Assessment of Culturally and Linguistically Diverse Students: A practical guide,” and “Essentials of Cross-Battery Assessment, 3rd Edition”. Dr. Ortiz is bilingual (Spanish) and bicultural (Puerto Rican).