· Chaired Professor of Future Communication Networks, Trinity College Dublin2021–
· Faculty Appointee, Physicist, NIST, Information Technology Lab2020–2021
· Adjunct Senior Faculty, Data Science Institute, Columbia University2018–
· Co-founder and CTO, Palo Verde Networks2016–
· Research Professor in Optical Sciences, University of Arizona2013–2021
· Research Scientist, Bell Labs, Alcatel-Lucent2000–2013
· Assistant Professor in Physics, University of North Carolina at Charlotte1997–2000
· Research Scientist in Physics, Montana State University1996–1997
· Ph.D. in Physics, The University of Michigan1996–
· M.S. in Physics, The University of Michigan1992–
· Research Assistant in Physics, University of Michigan1990–1996
· B.S. in Electrical Engineering, Virginia Polytechnic Institute and State University1990–
· B.S. in Physics, Virginia Polytechnic Institute and State University1990–
· Undergraduate Honors Researcher, Virginia Polytechnic Institute and State University1989–1990
· Internship in Electrical Engineering, IBM, Inc.1987–1989