He left after only a year 'at the helm' [='in charge'] of the corporation.
The ship's captain was 'at the helm'. [=steering the ship]
The ship's captain 'took the helm'. [=steered the ship]
(..) Will make the Piece of Resistance found From its hiding refuge underground And with a noble army at the helm This MasterBuilder will thwart The Kragle and save the realm And be the greatest Most interesting Most important (..)2014 The Lego Movie