punctuist
/ˈpʌŋktuɪst/ or /ˈpʌŋktʃɪst/Definitions
1. noun
A person skilled in punctuation, especially in correcting or advising on punctuation in written texts.
“She was a professional punctuist who helped authors perfect their manuscripts.”
2. noun
A person who punctuates, especially in music, by striking a mark or beat.
“The drummer acted as a punctuist to keep the rhythm of the band.”