Some people are brilliant writers when expressing their own opinions or narrative. However, if you ask them to write for a specialized manufacturing facility, for example, they may struggle to alter their personal styles to fit the more technical perspectives required by the company. Ask to see samples of work your candidate has written and examine the voice and tone of the pieces. If there are various clients or topics he or she has written for, do they all sound the same? Or was the writing style adapted to accomodate how various clients wanted to come across?