Education

	Ph.D. Mathematics, City University of New York, Graduate Center, October 2003. Advisor: Alexei Miasnikov Thesis: Algorithmic problems on automorphic conjugacy in the free group of rank 2.
	M.Sc. Computer Science, Johns Hopkins University, December, 1997. Advisor: Baruch Awerbuch Thesis: Algorithms for topology aggregation and competitive on-line routing.
	B. Sc. Math and Computer Science, Massachusetts Institute of Technology, May 1993.

Employment

	Sept. 2022-Present, Professor of Data Science Departments of Population Health and Computer Science, Lehigh University.
	Sept. 2022-Present, Director of the Health Data Science
	Sept. 2016-2021, Happold Professor of Sociology and Computer Science Departments of Sociology and Computer Science, University of Nebraska-Lincoln.
	Co-Director, Longitudinal Networks Core, Rural Drug Addiction Center (COBRE) Sept 2019-2021.
	Sept. 2009-2016, Professor of Mathematics and Computer Science Department of Mathematics & Computer Science, City University of New York, John Jay College. Doctoral Faculty CUNY Graduate Center, in Computer Science, 2005-2016; Doctoral Faculty CUNY Graduate Center, in Criminal Justice, 2008-2016. Graduate Faculty of Digital Forensics and Cybersecurity at John Jay College
	Sept. 2004-Aug. 2009, Associate Professor Department of Mathematics & Computer Science, City University of New York, John Jay College.
	Oct. 2000-Sept. 2004. Principal Research Scientist January 1996-Sept. 2000. Research Scientist Center for Computational Sciences, U.S. Naval Research Laboratory (NRL), Washington, DC.
	Co-Director, Social Networks Research Group (www.snrg-nyc.org). Jan 2009-2016.
	Research Affiliate. Center for Drug Use & HIV Research (NIH sponsored Center for Excellence) New York University & National Development Research Institute (August 2011-2018).
	Organizer for New York City Forensics and Security Group (NYC4SEC), a group of area professionals addressing industry needs in computer security and forensics 2009-2016.
	Director of John Jay College Laboratory for Digital Forensics and Cybersecurity (2004-2016).
	Research Affiliate at several public policy research institutes, including the Center for Court Innovation (NYC) and the Urban Institute (Washington DC).

Member of IEEE, ACM, AMS, SIAM