Daniel Preoțiuc-Pietro is a postdoctoral researcher in Natural Language Processing working for the World Well-Being Project in the Positive Psychology Center of the University of Pennsylvania. His research aims to leverage large-scale social media text to aid with psychology and health problems and has received extensive media coverage

Previously, Daniel completed his PhD studies on temporal models for social media as part of the Natural Language Processing Research Group at the University of Sheffield. During his time in Sheffield, he was also a part-time research associate for the TrendMiner EU FP7 project where he worked on predicting real world outcomes (e.g. political voting intention) and uncovering spatio-temporal patterns in large user-generated content.

He contributes to the 'Small Studies, Big Data' blog maintained by the World Well-Being Project.