Grid One Solutions (formerly VSI Meter Services, Inc.) specializes in AMI deployments for electric, gas and water utilities. In addition to smart grid implementation services for in-home displays and load control devices, Grid One performs meter reading, customer call center operations, field service work, joint use attachment surveys, storm support services, NESC clearance audits and utility asset inspections, construction and contractor management services and back office services including secure data transfer and storage. In February 2012, Utility Meter Services, Inc. merged with Grid One, almost doubling the size of its operations in North America.

With headquarters in Aston, Pennsylvania, Grid One has deployment facilities across the United States and parts of Canada. Grid One is part of UtiliCon Solutions, a wholly-owned subsidiary of the Asplundh, a major supplier of outsourced field services to utilities and municipalities. Asplundh is a privately-held company, founded in 1928, which currently employs over 30,000 people in the U.S., Canada, Australia and New Zealand.