Complex sentence: Friendly's first research project in the field of psychometrics and cognitive psychology had started at the Educational Testing Service and Princeton University, and was made possible by a Psychometric Fellowship awarded by the Educational Testing Service.
Split into simpler sentences: Friendly's first research project in the field of psychometrics and cognitive psychology had started at the Educational Testing Service and Princeton University, and were made possible by a Psychometric Fellowship. There he held a Psychometric Fellowship awarded by the Educational Testing Service.