Timekeeper

n.	1.	A clock, watch, or other chronometer; a timepiece.
	2.	A person who keeps, marks, regulates, or determines the time.
	3.	A person who keeps a record of the time spent by workmen at their work.
	4.	One who gives the time for the departure of conveyances.
	5.	One who marks the time in musical performances.
	6.	One appointed to mark and declare the time of participants in races or other contests.

Noun	1.	timekeeper - (sports) an official who keeps track of the time elapsed Synonyms: timer
	2.	timekeeper - a clerk who keeps track of the hours worked by employees
	3.	timekeeper - a measuring instrument or device for keeping time Synonyms: timepiece

Big Ben, accountant, amanuensis, annalist, archivist, bookkeeper, calendar maker, calendarist, chronicler, chronographer, chronologer, chronologist, chronometer, clerk, clock, clock movement, clockmaker, clockworks, diarist, documentalist, engraver, filing clerk, horologe, horologist, horologium, librarian, marker, notary, notary public, prothonotary, record clerk, recorder, recordist, register, registrar, scorekeeper, scorer, scribe, scrivener, secretary, stenographer, stonecutter, ticker, timepiece, timer, turnip, watch, watchmaker, watchworks