by trade
(idiomatic) As a profession; professionally.
Although he was a gifted musician, he was a plumber by trade and never played music professionally.
Perhaps the removal of trade restrictions throughout the world would do more for the cause of universal peace than can any political union of peoples separated by trade barriers. Frank Chodorov
No nation was ever ruined by trade. Benjamin Franklin
I'm an engineer by trade so I've always been interested in engineering and technology but also I've a strong interest in self build and off-grid properties and how it would affect us in terms of lifestyle. Andy Griffiths
Reference to the territory and total disregard for the nationality of the companies is of course the best guarantee that competition assessment remain just that and doesn't get affected by trade or other considerations. Mario Monti
I see myself as a comedian rather than a female comedian. I happen to be a woman, but I am a comedian by trade. Miranda Hart
The whole world is determined by trade - which is really the blood of the world. The driving force is everyone's desire to have a better life. How? By consuming. For countries, the 'Holy Grail' is economic growth. Yann Arthus-Bertrand