The American Institute of Physics website is the most relevant site for US physicists, containing forums, links and a wealth of statistics, survey data and job advertisements, as well as a section in which to post your resumé. Other useful URLs are those of the American Physical Society and the American Association for the Advancement of Science.

In Europe, start with the European Physical Society site. This connects you with the physics societies in Europe and gives access to sites like that of the non-profit group Association Barnard Gregory in France, a resource for job-hunting scientists. The UK Institute of Physics is the best funded European organization, and offers the most extensive resources and information about education and careers of the European sites.

For electronic searches, remember the bulletin boards and USENET. If you send unsolicited CVs, remember that they may be scanned into a database. Make sure the layout is clean and unfussy with no fancy typefaces. Make sure the CV contains the crucial search words that you would want to be identified to pull your CV to the fore. Good luck!

http://www.aip.org http://www.aps.org http://www.aaas.org http://www.iop.org http://epswww.epfl.ch/dir/ http://www.physlink.com http://invest-faq.com