The phrase 'knack for working' is correct and usable in written English.
You could use it when talking about a person's natural ability or talent at completing tasks. For example: "John has a knack for working with machinery, which is why he's always been able to fix any problem with our cars."
He may have been attracted to Gobbetti's apparent knack for working alongside creative types.
Mr. Cheney has a knack for working with political rivals, colleagues say.
Senior Obama administration officials say these veteran commandos bring to policy making in Washington astute long-range planning skills and a knack for working with disparate federal agencies.
Mr. McClellan grew up practicing martial arts, eventually earning a black belt, and as a college student realized that he had a knack for working with people.
What makes Santana very special is he has a knack for working in and out of traffic and catching quick stuff and making bigger gains out of it.
Most students at Duperré dreamed of being head designers, but Charles-Donatien gravitated toward fabrics and accessories, and he had a knack for working with others.
While working behind the scenes of a production, one of the actors unexpectedly dropped out it was Lenny who stepped up to the plate and quickly realized he had a knack for work in front of the camera.
The article described how the 100-year-old Nitto Seimo still has a knack for innovation, working on a tether that might be used to collect space debris.
The band's knack for openheartedness works well with television's private side, making its big show seem extemporaneous.
Disraeli had a knack for wooing the British working class with his combination of imperialist bombast and patrician reform; Macmillan styled conservatism as nothing other than "paternal socialism" in order to maintain a broad Tory base.
That pharmacist, who had watched me grow up in the neighborhood, said I had a knack for this work and motivated me to go for a pharmacy degree.
