1: ὑπηρέτης
(Strong's #5257 — Noun Masculine — huperetes — hoop-ay-ret'-ace )

for the original of which see MINISTER , A, No. 3, is translated "officer," with the following applications, (a) to a magistrate's attendant, Matthew 5:25; (b) to officers of the synagogue, or officers or bailiffs of the Sanhedrin, Matthew 26:58; Mark 14:54,65; John 7:32,45,46; 18:3,12,18,22; 19;6; Acts 5:22,26 . See MINISTER , SERVANT.

2: πράκτωρ
(Strong's #4233 — Noun Masculine — praktor — prak'-tore )

lit., "one who does," or "accomplishes" (akin to prasso, "to do"), was used in Athens of one who exacts payment, a collector (the word is frequently used in the papyri of a public accountant); hence, in general, a court "officer," an attendant in a court of justice (so Deissmann); the word is used in Luke 12:58 (twice). In the Sept., Isaiah 3:12 .