· Director of LTI and Full Professor, Carnegie Mellon University2023–
· Lead Responsible AI Research Scientist, Meta2020–2023
· Senior Research Scientist, Amazon AWS AI2017–2020
· Tenured Full Professor, George Washington University2013–2023
· Adjunct Associate Professor, Columbia University2009–2012
· Postdoctoral Research Scientist, Columbia University2005–2005
· Research Scientist (Principal Investigator), Columbia University2005–2012
· Postdoctoral Scholar/Scientist, Stanford University2004–2005
· Research Assistant, University of Colorado at Boulder, CSLR2003–2003
· Ph.D. Linguistics (Computational Linguistics), University of Maryland, College Park2003–
· Systems Analyst, Solutions Consultants International1997–1997
· M.Sc. Computer Science (Artificial Intelligence - Machine Learning), The George Washington University1997–
· Research Assistant, University of Maryland College Park, UMIACS1997–2003
· Graduate Teaching Instructor, The George Washington University1995–1997
· Teaching Assistant, American University in Cairo1993–1995
· Software Engineer, Regional Information Technology Software Engineering Center (RITSEC)1993–1995
· B.Sc. Computer Science & Software Engineering, American University in Cairo1992–
· B.Sc. Tourist Guidance (Egyptology & Archaeology), Helwan University1990–