We require two letters of recommendation and prefer that at least one come from a current employer. Select individuals with whom you have had considerable professional interaction, such as your supervisor or a major client. The title or status of those you select is not important. What does matter is how closely your letter writers have worked with you and whether they can attest to your value as an employee, your professional accomplishments, and your personal qualities and interpersonal skills in an organizational context. For this reason, we strongly discourage academic references. Letters of recommendation from co-workers, someone you have supervised, relatives, or personal and family friends are inappropriate and can be detrimental to the review of your application. Please do not submit more than two letters, and if you choose not to obtain a letter from your current supervisor, be certain to explain why.