Lisa Greene, MS, has more than 37 years of broad-based experience in management of accredited laboratories. She manages a team engaged in proficiency testing, analytical method development, and characterization of natural and manmade materials. Ms. Greene provided key technical support to the National Environmental Laboratory Accreditation Conference in developing the National Environmental Laboratory Accreditation Program (NELAP) and has partnered with both federal and commercial clients to develop bodies of knowledge for competent professional practice in sample collection and analysis. She can be reached at lcg@rti.org.