I am on long term disability (4 yrs). Can my employer terminate my employment with out a severance package? I am concerned about losing my group medical benefits.

Generally speaking, an employer can terminate on the basis of frustration (i.e., impossibility) if there becomes no prospect of the employment relationship continuing. However, the severance entitlements in this particular scenario vary from province to province. In this regard, please note that we can only advise with respect to matters in Ontario, Alberta, & B.C.