QUINCY, Mass.--(BUSINESS WIRE)--Granite Telecommunications, LLC, a provider of voice, data, networking, and other communications services, plans to hire 325 new employees next year at its Quincy headquarters and branch offices in Atlanta, Miami, New York, and Providence, Rhode Island. The company has grown by an average of 100 employees each year over the past decade and plans to increase that growth rate based on projections at the start of this year, with a goal of doubling the company’s work