How many movies have Bob Ivy and Jeff Shiffman collaborated on?

They have worked on 4 movies together! Their first movie together was Armed Response (1986) while their highest rated movie together was Hell Comes to Frogtown (1988). They have not worked together since Phantasm IV: Oblivion (1998).

Role
Demon Trooper
Crew
First Assistant Director
Crew
Stunt Coordinator
Crew
Second Unit Director
Crew
Second Assistant Director
Crew
Stunt Coordinator
Crew
Stunts
Crew
Second Second Assistant Director