Wikipedia
The term information scientist developed in the latter part of the twentieth century to describe an individual, usually with a relevant subject degree (such as one in CIS) or high level of subject knowledge, providing focused information to scientific and technical research staff in industry, a role quite distinct from and complementary to that of a librarian. Developments in end-user searching, together with some convergence between the roles of librarian and information scientist, have led to a diminution in its use in this context, and the term information officer or information professional are also now used.
The term was, and is, also used for an individual carrying out research in information science.
Brian C. Vickery mentions that the Institute of Information Scientists (IIS) was established in London during 1958 and lists the criteria put forward by this institute "Criteria for Information Science" (appendix 1) as well as his own "Areas of study in information science" (appendix 2). The IIS merged with the Library Association in 2002 to form the Chartered Institute of Library and Information Professionals (CILIP).
Usage examples of "information scientist".
Lee Spetner, a former MIT physicist and information scientist who has studied the mathematics of evolution for forty years, calculates that the number of possible variations that could occur in a typical mammalian genome to be in the order of one followed by 24 million zeros.
Every information scientist recognizes that some of these strategies may, indeed, be necessary in overload situations.