There are several companies specializing in employee examinations of all types. The larger firms are licensed to administer skill, intelligence, and personality tests. More than two million exams are administered by employers annually in the United States. I object to any form of intelligence testing, but view skills-based and personality exams as acceptable tools when used with other measures, such as work portfolios and peer reviews. Degrees and certifications are not substitutes for knowledge, either.
Creativity solves problems.
Knowledge requires the application of skills and information. I do not recommend basing personnel decisions solely on personality profiles. While professional psychologists and psychiatrists can gather information indicative of an individual's current personality, they cannot predict how the person might adapt to new challenges. I have seen introverts from a development department succeed in sales, when given the chance. Personality tests should only be used as a small portion of the hiring or transferring process.