This is the 1291st most frequent Russian word.
работой
"Работой" means "work" or "job" in the instrumental case in Russian.
In this sentence, 'работой' is the instrumental case of 'работа' and refers to his profession or job.
Он доволен своей работой.
He is satisfied with his job.
Here, 'работой' reflects the activities or tasks associated with her role or responsibilities.
Она всегда увлечена своей работой.
She is always passionate about her work.
In this instance, 'работой' denotes a specific task or project the group is focused on.