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Ph.D., Physics, Polytechnic Institute of Brooklyn, Brooklyn, NY, 1967
M.Sc., Physics, Polytechnic Institute of Brooklyn, Brooklyn, NY, 1962
B.Sc., Mathematics, Brooklyn College, Brooklyn, NY, 1960
2007-present: President, NanoRTD, a small business with emphasis on the operation of THz sources based on quantum tunneling devices
2006-present: Research Professor of Physics, Department of Physics, University of Connecticut
2001-2005: Research Professor of Physics, University of Hartford
1981-2004: Scientific Research Associates, Inc (President 1997-2004)
1966-1981: United Technologies Research Center, Senior Theoretical Physicist
 H.L. Grubin: “Transient Wigner function studies of DMS barrier devices”, in Proc. of CIMTEC, Vol.44, 2006.
 H.L. Grubin: “Wigner function studies of spin transport in dilute magnetic semiconductor barrier structures”, in Proc. of SPIE, Vol.5584, 2004.
 H.L. Grubin, R.C. Buggeln: “RTD Relaxation Oscillations, the Time Dependent Wigner Equation and Phase Noise”, Journal of Computational Electronics, Vol.1, No.1-2, pp.33-37, 2002.
 H.L. Grubin: “Wigner function and density matrices and their application to transport properties of semiconductor devices”, in Proc. of SPIE, Vol.3277, 1998.