Centralized Customer Service Supervisor National Seating & Mobility, Inc.Centralized Customer Service SupervisorChattanooga, TNPart timeWorks in partnership with Divisional Vice Presidents, Regional Area Directors, Area Funding Directors, Area Managers and Branch Leadership to support customer service outcomes within NSM branches and improving the experience of our clients and callers. The Centralized Customer Service Supervisor position is responsible for maintaining effective customer service for all centralized customer service functions.