Having him in the accounting department is like having a fox in a henhouse.
Иметь его в бухгалтерии все равно, что лиса в курятнике.
Definitions
A person or thing that poses a threat or danger to a vulnerable group or situation, often by being placed in a position where they can easily exploit or harm others; derived from the idea of a fox (a predator) being inside a henhouse (full of defenseless hens).
