U.S. Geological Survey, Lakewood, CO

Research Hydrologist, Senior Staff and South Platte River Basin Team, Water Resource Discipline, 6/01 – 12/04

U.S. Geological Survey, Champaign, IL

Supervisory Hydrologist, Senior Management and Upper Illinois River Basin Team, Water Resource Discipline, 1/97 – 6/01

U.S. Bureau of Mines, Minneapolis, MN

Research Geophysicist, Geotechnology Team, 6/1986 – 5/96

Other Governments

Technical assistance to Brazil
Visiting Scientist, Geological Survey of Brazil, Fortaleza, Brazil, 2008

Technical assistance to Finland
Visiting Scientist, Geological Survey of Finland, Kuopio, Finland, 2007

Technical assistance to the Republic of Kyrgyzstan, 2008 

Technical assistance to the European Union, 2007

Technical assistance to the Republic of Georgia, 2007

Technical Assistance to the Government of Finland, 2006-2008

Technical Assistance to the Government of Mauritania, 2006-2008

Technical Assistance to the Government of Romania, 2005-2007

Technical Assistance to the Government of Haiti, 2005-2006

Technical Assistance to the Government of El Salvador, 2003-2004

University

Colorado School of Mines, Golden, CO
Adjunct Professor, Geophysics Department, 2006 - present

University of Colorado, Denver, CO
Adjunct Professor, Dept of Geog. and Envir. Sciences, 2004 – present

Universidade de Brasilia, Brasilia, Brazil
Visiting Professor, Instituto de geociencias, Laboratorio de Geofisica Aplicada, 2008

Universidade Estadual de Campinas, Campinas, Brazil
Visiting Professor, Instituto de geociencias, 2008

University of Kuopio, Kuopio, Finland
Visiting Professor, Environmental Science, 2007

Universidad Centroamericana, San Salvador, El Salvador
Visiting Professor, Energy and Fluids, 2003, 2004, 2005, 2006, 2007

Hohai University, Nanjing, China
Visiting Professor, Water Resources and Hydraulic Engineering, 2005

Colorado College, Colorado Springs, Colorado
Visiting Professor, Geology Department, 2003

University of Minnesota, Minneapolis, Minnesota
Researcher – U.S. Army High Performance Computing Center, unsaturated zone modeling group, 1995-1996

University of Wisconsin, Milwaukee, Wisconsin
Geophysical consultant, Department of Geosciences, 1985–1986

University of Wisconsin, Milwaukee, Wisconsin
Research Assistant, Department of Geosciences, 1984–1985