That depends on their occupation. An infantry Sergeant would normally be a fire team leader, but they might also serve as unit armourer, training room NCO, or they could be assigned a staff position. Same with Sergeants in any other MOS.
No, he wasn't. Or maybe he was: a Sargeant-Major in the British Army in 1906.
The rank of Sargeant has the insignia of three downward-pointing chevrons.
It simply Translates to Senior Sargeant. In Russian its like this "ста́рший сержа́нт"
The rank for a non-commissioned officer is "sergeant", and this also applies to police or other ranks. The abbreviation is normally used only as a title with a name, e.g. Sgt. Bill Jones.
Gogi Sargeant is 5' 5".
Rahn Sargeant is 6' 4".
Carl Sargeant was born in 1968.
Livingstone Sargeant was born in 1947.
Adrian Sargeant was born in 1964.
James Sargeant was born in 1936.
Neil Sargeant was born in 1965.
Terry Sargeant was born in 1946.