After we have agreed to work together, the first thing I am going to ask you for is a description of the job. The rule of thumb here is: “the more I know about what you want, the better chance I have of finding the person you will hire.” That seems easy enough, but many times you may not know exactly what you want. Strangely enough, that happens quite often so I have learned to deal with it. Usually when this happens you will start to form an idea of what you want after you have interviewed a few people.
Naturally there are some obvious sources that can be used for defining the job; namely a formal job description. That’s best, but not always available. If not available, it is best if I can speak directly to the person(s) the job answers to. Typically, I can ask the right questions and piece together the information I need to get started.