If a killer robot doesn't have practical military application it could be used as a chef in the kitchen, fetching vegetables and meats and cutting them to serve, but it would likely be first used in commercial kitchens before it saw service in every kitchen. Also, it would be good to hire a kitchen robot chef after its term of service is up to reintegrate back in to society and boost the local economy. Strange that Infantry is a different MOS than Culinary Specialist.