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Most likely, the person should be able to use a CRM Tool. e.g. Sales Force. A proper database ( Search Engine like google, but also should know the keywords to be used to identify his needs) to identify his prospects. And now a days most important is to know how to use a Smartphone and various apps which will be very handy for his Job.
A phone ofcourse :) A CRM system it helps a lot.A Search engine related to his sales field.Any resources available in order to make his job easier