1
general::
In charge, in command, as in With Charles at the helm, the company is bound to prosper. This phrase transfers the idea of steering a ship to directing other enterprises. [Early 1500s] Also see the synonym AT THE WHEEL.
American Heritage Idioms
2
general::
Phrase(s): at the helm (of something)
Fig. in the position of being in control of something. • The president is at the helm of the company. • Things will go well with Anne at the helm.
McGrawhill's American Idioms And Phrasal Verbs