He focused on its curatorial activities and was influential in establishing the reputation of its exhibition program nationally and internationally.
[6] Critic J. Hoberman described his work from this period as "extraordinarily subtle and elusive, even in the context of other reductionist filmmakers.
As he made the transition from film to video, he began working with superimpositions, dissolves, and dense soundtracks.
After Grenier settled in Ithaca, his films captured his home there, as well as the local community.
Michael Sicinski compared Grenier's work to Objectivist poetry, in that it "both describes and reconfigures its subject.