fellow servant

(under the fellow-servant rule) an employee working with another employee for the same employer.

Origin of fellow servant

First recorded in 1525–35

However weary her heart might be, she would dance at every wedding,—of fellow-servant or of young mistress.

Feats on the Fiord |Harriet Martineau
This is proved by the words of the fellow-servant: "Have patience with me, and I will pay thee all."

Writings in Connection with the Donatist Controversy |Aurelius Augustine
For Heaven's sake go about your business, for here comes a fellow-servant of mine.

The Widow's Vow |Elizabeth Inchbald
I have already observed that he and his fellow-servant occupied the same apartment in the barn.

Edgar Huntley |Charles Brockden Brown

The witnesses did not understand all this, because the accused seemed to be very good to her fellow-servant.

She Stands Accused |Victor MacClure