noun, masculine/ɡi.ʃə.tje/plural: guichetiers
guichetier is masculine in French.
turnkey; counter clerk
“Cette fois il ne suffit point du pas lourd et des souliers ferrés du guichetier, du cliquetis de son nœud de clefs, du grincement rauque des verrous ; il fallut pour me tirer de ma léthargie sa rude voix à mon oreille et sa main rude sur mon bras.” — This time, the loud steps and iron shoes of the turnkey, the jingling of his bunch of keys, the sharp squeaking of the lock wasn't enough; to yank me from my lethargy they had his booming voice in my ear and his rugged hand on my arm.
From guichet + -ier.