(nautical, literally) Steering a vessel.
(idiomatic) In charge of a company or project.
Source: en.wiktionary.orgEnlightened statesmen will not always be at the helm. James Madison
It is only natural that for any statesman at the helm of any government the question of his country's security should be a concern of the utmost importance. Eisaku Sato
We are at the helm of not only our own physicality but our environment and other species, too, as sentient, conscious beings who can think of future and affect consequence, and create progeny with our minds as well as our bodies. Vanna Bonta
The United States needs a man at the helm who knows some psychology, who would know that you can't try to dictate to a people from abroad without stiffening their resistance. Pieter Willem Botha
It is easy to sit at the helm in fine weather. Danish Proverb
Don't speak to the man at the helm. French Proverb