Wiktionary
n. (context US Navy English) A non-commissioned officer in the United States Navy and United States Coast Guard, ranking above chief petty officer and below master chief petty officer.
Wikipedia
Senior chief petty officer is an enlisted rank in the navies of some countries.
Usage examples of "senior chief petty officer".
A burly, battered looking man in the uniform of a senior chief petty officer followed him and came to attention to his right and a half pace behind him.
A senior chief petty officer, he was responsible for the complicated repair of the intercept and cipher gear on board.
In the missile-control center - MCC - aft of the cavernous missile room, a senior chief petty officer lit up his panel.
So did Harkness, apparently, and he looked more like an HD writer's concept of a pirate than a senior chief petty officer of Her Majesty's Royal Manticoran Navy—.
So did Harkness, apparently, and he looked more like an HD writers concept of a pirate than a senior chief petty officer of Her Majestys Royal Manticoran Navyespecially with the pulser and bush knife he insisted on carrying everywhere with himas he frowned up into the small, electronics-packed compartment.
Robby identified himself to a senior chief petty officer, and it turned out that they'd both served on the Kennedy a few years before.
It didn't even cross Bass's mind that the bosun of the Fairfax County was a senior chief petty officer, the navy equivalent of a Marine sergeant major.