Why is it der Amtsleiter?

Amtsleiter ends in -er, and most nouns ending in -er are masculine: in a German dictionary, 86% of them take der.

All nouns ending in -er
Sense 1
der

Meaning

[1] Head of an office

[1] Leiter eines Amtes

Examples

[1] Mr. Redau was the head of the regulatory office in Bargstedte for many years

[1] Herr Redau war lange Jahr Amtsleiter des Ordnungsamtes in Bargstedt.

Declension

1 Singular Plural
Nominativ der Amtsleiter die Amtsleiter
Genitiv des Amtsleiters der Amtsleiter
Dativ dem Amtsleiter den Amtsleitern
Akkusativ den Amtsleiter die Amtsleiter

Pronunciation

Dictionary entries include material from Wiktionary. Wiktionary