internal auditor(n = noun.person) - an auditor who is an employee of the company whose records are audited and who provides information to the management and board of directors;
is a kind of auditor

auditor, collector of internal revenue, female internal reproductive organ, internal, internal angle, internal auditory artery, internal auditory vein, internal carotid artery, internal cerebral vein, internal combustion, internal control, internal drive, internal ear, internal iliac artery, internal iliac vein, internal jugular vein, internal maxillary artery, internal medicine, internal organ, internal representation, internal respiration, internal revenue, internal revenue agent, internal revenue service, internal rhyme, internal secretion, internal spermatic artery, male internal reproductive organ