Pilgrim's - - Responsibilities: Must be certified in ammonia refrigeration or related field; Must have technical training in ammonia refrigeration with documentation or one-year experience in the operation of industrial ammonia refrigeration systems; Must have a good understanding of the basic refrigeration cycle; Must be able to read and understand Piping and Instrument diagrams; Must become familiar with and adhere to all general plant and refrigeration safety policies within the first 6 months of employment