The DSM-IV-TR manual (American Psychiatric Association 2000) uses ‘anxiety’ as a general term for a range of more specific anxiety disorders, which includes panic attacks, generalized anxiety disorder, specific phobias, social phobias, obsessive compulsive disorder and post traumatic stress disorder. However there is currently no literature applying these criteria to work and career anxiety, and nothing in the DSM-IV-TR which relates these disorders specifically to the work situation. Thus, the present chapter extrapolates the existing classifications of anxiety to the workplace from other settings.