June 1996: Communicating Mathematics with Hypertext. Helped organize this workshop for teachers; Geometry Center, University of Minnesota.
See http://www.geom.umn.edu/events/courses/1996/cmwh for details.

December 1994: Workshop on Systems Administration: The Mathematician's Perspective. Helped organize, and gave several presentations at this workshop for computer systems administrators of mathematics departments; Geometry Center, University of Minnesota.

July 1994: Software Tools for Visualization at the Geometry Center. Presentation; SIAM Annual Meeting, San Diego, CA.

October 1993: Interactive Real-Time Software for Mathematical Visualization. Co-organized this special session, with George Francis and Norbert Quien. Joint Meeting of the AMS and DMV (German Mathematical Society), Heidelberg, Germany.

October 1993: Geomview: An Interactive Geometry Viewer. Experimental Mathematics Seminar; University of Bonn, Germany.

March 1992: Visualizing Hyperbolic Space. Presentation; ACM SIGGRAPH Symposium on Interactive Computer Graphics; Boston, MA.

(with Silvio Levy and Tamara Munzner) "Geomview: An Interactive Geometry Viewer", Notices of the American Mathematical Society, October 1993, pp 985-988.

"Dirichlet Polyhedra for Cyclic Groups in Complex Hyperbolic Space", Proceedings of the American Mathematical Society, Volume 115, Number 1, May 1992.

(with Charles Gunn) "Visualizing Hyperbolic Space: Unusual Uses of 4 x 4 Matrices", Proceedings of the 1992 Symposium on Interactive 3D Graphics, ACM SIGGRAPH, March 1992.

"Mathematica as an Interface to an Interactive Mathematical Graphics Program", The Mathematica Journal, Vol. 1 No 2, Fall 1990.

(with G. M. Odell) ``An Algorithm for Locating and Displaying the Intersection of Two Arbitrary Surfaces,'' IEEE Computer Graphics and Applications, Vol. 4 No. 9, September 1984,
pp 48--56.

2001-present: Developed Java applets to accompany units on technical applications for high school mathematics classes; see http://www.comap.com/highschool/projects/techmap for details.

1999-2001: Led team of 3 people in development of http://www.comap.com, web site for the Consortium for Mathematics and its Applications (COMAP). Site includes access to a database of teaching materials; e-commerce on site allows visitors to sign up for annual membership which gives access to download the materials.

1998-2000: Worked on the team that developed WebEQ (http://www.dessci.com/webmath/webeq), a Java based suite of tools for authoring and displaying math equations in web pages.

1998: Led a team of 8 people in development of http://www.ScienceU.com, an interactive online science and mathematics museum.

1996: Supervised a team of 2 programmers to develop JGV, an interactive 3D viewing program written in Java; see http://www.geomtech.com/products/JGV for more information.

1992-1995: Led a team of 5 programmers to design and develop Geomview, an interactive 3D visualization package at the University of Minnesota's Geometry Center. Specific tasks included: overall management of the team, design and implementation of the package's internal parser and lisp-like language, scheduling and management of software releases, writing users guide and documentation, and designing a process for incorporating user feedback into the development cycle. Geomview is distributed on the internet as free software under the GNU Public License; see http://www.geomview.org for more information.

1995: Worked on the team to design and produce The Shape of Space, a computer-generated animation illustrating concepts from geometry and topology as they relate to cosmology and theories of the universe. Key Curriculum Press distributes The Shape of Space; see http://www.keypress.com/catalog/products/supplementals/Prod_ShapeOfSpace.html for details.

1994: Worked on the team to design and produce Outside In, a computer-generated animation illustrating a recent mathematics theorem related to turning a sphere inside out. Outside In won numerous awards, including first prize at Nicograph (Japan), first prize at the London Effects and Animation Festival, and selection into SIGGRAPH's Electronic Theater. A.K. Peters distributes Outside In; see http://www.geom.umn.edu/docs/outreach/oi for details.

1991: Helped arrange an exhibition of the art of mathematical sculptor Helaman Ferguson at the Marsh Art Gallery at the University of Richmond (see http://www.helasculpt.com).

Served for 5 years as the manager of the technical staff of approximately seven people at the University of Minnesota's Geometry Center. Responsibilities included hiring and supervision of staff, equipment purchasing and management, supervising software development projects, and aiding in the preparation of funding proposals and presentations.

English, German, some Spanish.

Basic, C, C++, CGI, Cobol, Fortran, GNU Development Tools, HTML, Java, JavaScript, Lisp, OpenGL, PHP, Pascal, Perl, Postscript, SQL, Tcl/Tk, ...