This is the 4793rd most frequent German word.
as
"As" in German means "ace" (e.g., a playing card or someone excellent at something).
In this sentence, 'als' is used to indicate the role or capacity someone is in.
Er arbeitet als Arzt.
He works as a doctor.
Here, 'als' is used for comparison in a manner similar to 'than' in English.
Es ist nicht so warm als gestern.
It is not as warm as yesterday.
'Als' in this context signifies the perception or identifying someone in a specific way.