Improve the bracketed part of the sentence.As management we are accountable (to) the Board of Directors.

The adjective "accountable" (meaning responsible for your decisions or actions and expected to explain them) is followed by the preposition "to" when referring to the person or body to whom one is responsible (e.g., accountable to someone).Since the sentence uses "accountable to the Board of Directors," the underlined part is grammatically correct and requires no improvement.