This is the 6004th most frequent Russian word.
служащим
"служащим" means "employee" or "staff member."
In this sentence, 'служащим' is used as a noun referring to a person employed in a particular service or institution.
Он работает служащим в банке.
He works as an employee in a bank.
Here, 'служащего' is the genitive case singular form of 'служащий', implying possession or relation to the employee's duties.
Его обязанности как служащего включают обслуживание клиентов.
His responsibilities as an employee include customer service.
In this sentence, 'служащим' is an instrumental case singular form, used to describe a state or role.