Maryland Negotiation Service (MNS) is an affiliate of the Public School Superintendents Association of Maryland (PSSAM).

The Maryland Negotiation Service, an extension of the Public School Superintendents Association of Maryland, the state organization for school labor relations practitioners, presents a unified voice on labor relations issues for Maryland public school systems and promotes effective professional practice through leadership, information sharing and data-based decision making, professional activities, and broad-based networking.