| Year | Position | Institution |
| 1987 | Undergraduate Student | Boston University 4 |
| 1992 | California Institute Of Technology 4 | |
| 1993 | California Institute Of Technology 4 | |
| 1994 | California Institute Of Technology 4 | |
| 1997 | University Of California San Diego 4 | |
| 1998 | University Of California San Diego 4 | |
| 1999 | University Of California San Diego 4 | |
| 2000 | University Of California San Diego 4 | |
| 2001 | San Diego State University 4 | |
| 2002 | San Diego State University 4 | |
| 2003 | San Diego State University 4 | |
| 2004 | San Diego State University 4 | |
| 2005 | San Diego State University 4 | |
| 2006 | San Diego State University 4 | |
| 2007 | San Diego State University 4 | |
| 2008 | San Diego State University 4 | |
| 2009 | San Diego State University 4 | |
| 2010 | San Diego State University 4 | |
| 2011 | San Diego State University 4 | |
| 2012 | San Diego State University 4 | |
| 2013 | San Diego State University 4 | |
| 2014 | San Diego State University | |
| 2016 | San Diego State University |