Cell-type specific anti-apoptotic transcription factor required for the sexually dimorphic survival of the male-specific CEM (cephalic male) sensory neurons during sex determination. In hermaphrodites, the homologous cells undergo programmed cell death due to transcriptional repression of ceh-30 by tra-1, the terminal regulator in the sex determination pathway. Expressed transiently in embryonic CEM (cephalic male) sensory neurons. Worms undergo programmed cell death of CEM (cephalic male) sensory neurons in males.