EC Infosystems will continue to provide New York based ESCO with integrated Electronic Data Interchange and CIS/Billing solution   UNIONDALE, N.Y. –September 22, 2015  – EC Infosystems, a leader in Electronic Data Interchange (EDI) and Billing/Customer Information Solutions (CIS) for clients in the deregulated energy industry, today announced that Chief Energy has renewed its contract with… Keep reading →