As CEO of Accenture's North America business, Julie Sweet runs a $16 billion business and oversees a team of more than 50,000 employees. So she knows a thing or two about the most valuable skills in the corporate world.
The best investment a professional can make is to develop one often overlooked skill, the CEO says.
"What's the greatest advice I give?" Sweet tells CNBC. "Develop excellent communication skills." Both in person and in writing, such as when using email.
"I think people underrate the importance of investing in your communication skills as a way to progress in your career," Sweet says.