I like to understand how things work. That's why I studied science and gravitated toward computers. I have always sought work that challenges me to learn and I enjoy sharing what I learn. When I learn something new or help another person understand something it often deepens my understanding of what I thought I already knew.

• University of Washington, Seattle, WA. Ph.D., Physiology-Psychology.
  
  
• Massachusetts Institute of Technology, Cambridge, MA. S.B., Life Sciences.
  
  

April 2007-present -- Greenfield Public Schools, Greenfield, MA.
Network Technician, supporting a Windows-based network of several hundred computers in classrooms, labs, and offices at nine locations in the Town of Greenfield.

January-April 2007 -- H & R Block, Hadley, MA.
Tax Preparer.

2006 -- Pax Analytics, Hiesburg, VT ( http://www.paxana.com/).
Consultant, developed GPS interface and flash card file system support for data logger (C programming).

Spring 2006 -- University of Massachusetts, Amherst, MA.
Lecturer, Department of Computer Science. Taught CMPSCI 201, Architecture and Assembly Language Programming.

2003-2005 -- Co-authored (with Andrew S. Tanenbaum) Operating Systems Design and Implementation, 3rd edition (Prentice-Hall, 2006). I had primary responsibility for revising the book, drawing upon and updating material contributed by my co-author. I had sole responsibility for a detailed explication of the source code of the central components of the Minix 3 operating system, almost 400 pages of C and assembly language source code, included as an appendix to the text.

2001-2005 University of Massachusetts, Amherst, MA.
Computer Systems Specialist, Department of Biology. I administered Unix (Solaris) server systems and assisted with network maintenance. I also supported networked Windows and MacIntosh client systems in classrooms, offices, and research laboratories of the Biology and Geosciences departments.

1998-2001 University of Massachusetts, Amherst, MA.
PC Support Specialist, PC Classroom Operations, Office of Information Technologies. I was in charge of technical support for computer classrooms and labs in many locations on the Amherst campus. Client systems used Windows NT, Mac OS, and Linux and were supported by Windows NT and MacIntosh servers.

1994-1996 -- Co-authored (with Andrew S. Tanenbaum) Operating Systems Design and Implementation, 2nd edition (Prentice-Hall, 1997). My major responsibility was the detailed explanation of 27,000 lines of C source code for the Minix operating system (a Unix clone).

• January 2002: Sun,Inc. Solaris System Administration course.
  
  
• Various times, 2000-2002: Numerous short courses on various system administration topics at Usenix and LISA conferences.
  
  
• Various times, 1998-2001: Several short courses on various work-related topics provided on-campus by UMass Office of Information Technologies.
  
  
• Summer 1986: Completed Institute for Retraining in Computer Science (IFRICS) at Clarkson University, Potsdam NY, a summer program for science and mathematics faculty transitioning into computer science teaching duties. Sponsored by the Mathematics Association of America, this course put participants through the equivalent of a Computer Science degree program in two summers. I was given advanced placement credit for the first year.
  
  

• Foreign Languages: proficient in Spanish and French. I have taught university level computer science courses in Spanish, and have given presentations in Spanish at universities in Cuba, El Salvador, and Nicaragua. With colleagues from Nicaragua I reviewed the Spanish translation of my own Operating Systems Design and Implementation, 2nd edition for Prentice-Hall Mexico.
  
  
• Computer Languages: BASIC, C, Forth, FORTRAN, Pascal; assembly languages for many different CPUs, Unix shell scripting, many others. I have written disassemblers, assemblers, cross-assemblers, and compilers, as well as application programs.
  
  
• Computer System Administration: for ten years I maintained minix1.hampshire.edu, providing information and software for users of the Minix operating system via web pages and an ftp server. I wrote and formatted content and remotely maintained the server. The content has now been transferred to minix1.woodhull.com on a commercial server.
  
  
• Mailing List Administrator:  MINIX-L mailing list.
  
  
• Publications: I have written many articles and reviews for computer and electronics publications, as well as encyclopedia articles and instructional materials.
  
  
• U.S. Peace Corps Volunteer, Nigeria, West Africa. Taught high school biology, physics, and French.
  
  
• Licensed Amateur Radio Operator (Extra Class license N1AW).
  
  

Upon request I can provide a list of publications and references.