Named to Staffing Industry Analysts Largest Staffing Firms in the US (2017), Fastest Growing Staffing Firms in the US (2016), Largest Travel Nurse Staffing Firms (2015-2017), Largest Allied Staffing Firms (2016, 2017), and Largest Healthcare Staffing Firms (2016, 2017). PICU RNs provide intensive nursing care and continuous monitoring of breathing, heart rate, and blood pressure, so you must have strong clinical knowledge in addition to a caring bedside manner.