RN Instructor - Home Care We have PER DIEM RN Instructor Positions available in Yonkers. X-TREME CARE has service offices located in each borough of New York City as well as Nassau, and Westchester counties. We offer free DOH Approved HHA & PCA Certification course. We are looking for KOREAN speaking Registered Nurse to be the HHA Instructor. Responsibilities. Manage the orientation, teaching and evaluating of DOH Approved HHA and PCA Certificati...