Our Mission: To Serve Individuals with Multiple Sclerosis Through their Lives:The mission of the Multiple Sclerosis Service Society (MSSS) is to provide assistance to those diagnosed with Multiple Sclerosis through a variety of rehabilitative services. It is our goal is to help the general public and families of victims to better understand Multiple Sclerosis and the problems associated with the disease. The MSSS has been serving clients with Multiple Sclerosis since 1952.