Phillips joins the firm from Haven Power, where he was head of industrial and commercial sales and helped the business grow significantly over the last three years.
Dong hopes that Phillips’ substantial experience in the electricity market will help the company’s own growth.
Phillips said: “Customer focus is key to the success of any company but for today’s energy industry, adaptability is absolutely crucial.
“This is where Dong Energy’s forward thinking vision really leads the way. DONG Energy truly believes in working in partnership with customers, with a passion for building new energy solutions for the future.”
Earlier this year the business supplier committed to invest in sustainability by providing premium-free green electricity to customers from April 2016.