You may think it's an employee's responsibility to apply for jobs that fit their personality. However, people rarely think about whether or not they would enjoy a particular job. They look at the salary, education requirements, location, or benefits package. As an employer, you may have to fit your employees to jobs in which they are most likely to excel.
Job Fit™ refers to the behaviors and interests needed to succeed in a job. We are who we are. Our "mental DNA" is influenced both by our genes and our early life experiences, and it is almost completely formed by the time we are 20 years old. Rather than trying to understand themselves so that they can choose a calling that builds on their strengths and aligns with their interests, employees often choose jobs because of peer pressure and societal influences.
"Skills can be taught, but behaviors are much more difficult to change."
You probably know a medical doctor who trained at a prestigious school and worked for several years at a modern hospital. Despite adequate skills, tools, and experience, he is aloof, insensitive, and has a terrible bedside manner — and you only see him if no one else is available. He might have been better suited as a lawyer so that he could cross-examine a witness on trial. In short, he really doesn't possess the innate compassion that would make him a great doctor. He is a poor fit for his job.
It is important to understand a person's innate behaviors and interests when trying to match him with the right job. Know the job, know what type of person is successful in that job, and then hire others who have the behavioral traits that fit that job. This is easier said than done because it is difficult to gauge behaviors in a job interview, but behavioral assessments can be extremely helpful in guiding hiring managers to the right decision.
A doctor can improve his bedside manner through training and mentoring, but it takes tremendous effort and motivation to change natural behavior. If an individual isn't motivated to change, then he probably won't.