This is the 16049th most frequent Russian word.
работающего
"Работающего" means "working" (as in someone who is currently employed or performing work).
'работающего' is used as a participle describing 'человека'. It specifies that the person is engaged in the action of working.
Я видел работающего человека в парке.
I saw a working person in the park.
'работающих' is used as a participle agreed in case and number with 'сотрудников'. It describes the employees doing the work.
Директор заметил сотрудников, работающих поздно вечером.
The director noticed the employees working late in the evening.
'работающими' is used as a participle in instrumental case with 'авторами', describing the manner in which they write (working diligently).