Signed language interpreters share the same values and aspirations as their spoken language counterparts in relation to norms of behavior (role), standards, ethics, professional associations, regulations, testing, and training. As with the broader interpreting field, signed language interpreting practice is diverse, with wide variation internationally in terms of stages of professionalization, provision of interpreter training, and certification. This entry gives an overview of the SLI profession with examples from around the world, including its development from Deaf community roots and the recognition of signed languages, the establishment of SLI associations and training, and the evolving concept of interpreter role.