Design of custom interactive computer visualization and data analysis software, IT security, web design, graphics, IT solutions
Positions and Appointments
1978-1982 Linguist, Electronic Security Command, United States Air Force
1984 Geotechnical Inspector, Pittsburgh Testing Laboratory - Baltimore, Maryland
1984-1987 Research Assistant, University Of Maryland, Geology Program at NASA Goddard Space Flight Center
1987-1993 Research Assistant, University Of Maryland, Astronomy Program at NASA Goddard Space Flight Center
1993-2009 Sr. Systems Administrator and Software Engineer for Science Systems and Applications, Inc. at NASA Goddard Space Flight Center
2009-Present Sr. Systems Administrator and Software Engineer for ADNET Systems, Inc. at NASA Goddard Space Flight Center
2007 - MS (Information Technology / Information Assurance) University of Maryland University College
1996 - BS (Computer and Information Science) University of Maryland University College
1987 - BS (Geology) University of Maryland
2005 Buczkowski, D. L., Frey, H. V., Roark, J. H. and McGill, G. E. Buried impact craters: A Topographic Analysis of Quasi-Circular Depressions, Utopia Basin, Mars. Journal of Geophysical Research, 110.
2004 Roark, J.H., Masuoka, C.M., and Frey, H.V. Gridview: Recent Improvements in Research and Education Software for Exploring Mars Topography. Lunar and Planetary Science conference, XXXV, Houston, TX. 1833.
2003 Roark, J. H., J. W. Keller, F. Niepold, S. E. H. Sakimoto, S. Stockman and H. V. Frey. 3-Dimensional Topographic Models of Geologic Features for the Classroom. GSA Annual Meeting, Seattle WA., abstract 66476.
2002 Roark, J. H., Mitchell, D., Biter, E., Keller, N., Polit, A. T., Chase, Z., Riedel-Bash, S., Sarid, A., Weiler, A., Hanson, D. Students Study Mars with Interactive Analysis Tools Designed at NASA's GSFC Geodynamics Branch. GSA Annual Meeting, Denver, CO, abstract 45092.
2002 Frey, H.V., J.H. Roark, K.M. Shockey, E.L. Frey, and S.E.H Sakimoto. Ancient Lowlands on Mars. Geophys. Res. Lett., 29, No. 10, 10.1029/2001GL013832.
2002 Frey, H.V., J. H. Roark, G .J. Hohner, A. Wernecke and S. E. H. Sakimoto. Buried Impact Basins as Constraints on the Thickness of Ridged Plains and Northern Lowland Plains on Mars. , LPSC XXXIV.
2001 Roark, J. H. and H. V. Frey. GRIDVIEW: Recent Improvements in Research and Education Software for Exploring Mars Topography. LPSC XXXIII, abstract 1618.
2000 Roark, J. H., H. V. Frey, S. E. H. Sakimoto. Interactive graphics tools for analysis of MOLA and other data. LPSC XXXI, Houston, TX, Abstract 2026.
1999 Frey, H., S. E. H. Sakimoto, J. H. Roark. Discovery of a 450 km diameter, multi-ring basin on Mars through analysis of MOLA topographic data. Geophys. Res. Lett. 26, 1657-1660.
1999 Frey, H. L. Hutchison, J. H. Roark and S.E.H. Sakimoto. New candidate ancient impact basins on Mars found through analysis of MOLA profile and gridded data. GSA Annual Meeting, Denver, CO, October 25-28.