Essensa partners with American Hockey League 09/2015 NEW YORK/SPRINGFIELD, Mass. ... The American Hockey League (AHL) and Essensa, a national group purchasing organization (GPO), today announced a new, multi-year partnership. Essensa will become a sponsor of the AHL Marketing Meeting and AHL Annual Meeting, and will be the Official GPO of the AHL, providing cost-saving opportunities to the league and its participating AHL member clubs. This agreement was brokered by Denver-based Impression Sports & Entertainment.