Graduate research assistant (Department of Wildlife and Fisheries Science, University of Arizona). Aug 2003 – present. Ph.D. program.

Graduate research assistant (Department of Biological Sciences, Northern Arizona University) Aug. 2002 – Aug. 2003. Ph.D. program.

Database management (United States Geologic Survey, Biological Resources Division, Colorado Plateau Field station) Feb.-August 2002.

Research Aid (Sierra Nevada Aquatic Research Lab, Marine Science Center, University of California Santa Barbara) June-August 2001.

Research specialist I (Classified Staff, Department of Biological Sciences, Northern Arizona University) April 2000-Jan 2001.

Field Research Assistant (United States Geologic Survey, Biological Resources Division, Colorado Plateau Field Station) March-Oct. 1998 and March-Dec. 1999.

Research Assistant (Department of Biological Sciences, Northern Arizona University) Nov. 1998-Jan. 1999.

Research Assistant (Department of Biological Sciences, Northern Arizona University) Feb 1999.

Research Specialist I (Classified Staff, Department of Biological Sciences, Northern Arizona University) March, April 1996 and Sept. 1996-Dec. 1997.

Laboratory Technician (Department of Biological Sciences, Northern Arizona University) May 1995-Feb. 1996

Research Assistant (Northern Arizona University, Department of Forestry) May-Aug. 1994.

Biological Research Aid (Museum of Northern Arizona) Sept. 1993-April 1994 and Sept.

Experimental Biological Aid (Oregon Department of Fish and Wildlife) May-Sept. 1992 and June-Aug 1993.

Biological Field Research Technician (Oregon Cooperative Fisheries Research Unit, Oregon State University) May-Aug. 1991.

PEER REVIEWED ARTICLES:

Shannon, Joseph P, D. W. Blinn, T. McKinney, E. P. Benenati, K. P. Wilson and C. O'Brien. 2001. Aquatic food base response to the 1996 test flood below Glen Canyon Dam, Colorado River, Arizona. Ecological Applications 11: 672-685.

Blinn, D.W., J.P. Shannon, K.P. Wilson, C. O’Brien, and P.L. Benenati. 1999. Response of benthos and organic drift to a controlled flood. In, The Controlled Flood in Grand Canyon, Geophysical Monographs 110: 257-291.

O’Brien, C. and D.W. Blinn. 1999. The endemic springsnail, Pyrgulopsis montezumensis, in a high CO2 environment: Importance of extreme chemical habitats as refugia. Freshwater Biology. 42: 1-10.