Ms. Collier was appointed Executive Director of the Delaware River Basin Commission (DRBC) on August 31, 1998. The DRBC is an interstate/federal commission that provides a unified approach to water resource management without regard to political boundaries. Before joining DRBC Ms. Collier was Executive Director of Pennsylvania's 21^st Century Environment Commission. Governor Tom Ridge formed the Environment Commission in 1997 to establish the Commonwealth's environmental priorities and to recommend a course of action for the next century.

At the time Governor Ridge asked Ms. Collier to serve as executive director for the 21^st Century Environment Commission, she was Regional Director of the Pennsylvania Department of Environmental Protection (PADEP) Southeast Region. Prior to PADEP, Ms. Collier served 19 years with BCM Environmental Engineers, Inc., Plymouth Meeting, Pa., beginning as a student intern and ultimately becoming Vice President of Environmental Planning, Science, and Risk.

Ms. Collier has a B.A. in Biology from Smith College and a Masters in Regional Planning from the University of Pennsylvania. She is a Professional Planner licensed in the State of New Jersey, a member of the American Institute of Certified Planners (AICP), and a Certified Senior Ecologist. In 1997 she was presented the Touchstone Award from the Society of Women Environmental Professionals and in 1998 the Woman of Distinction Award from the Philadelphia Business Journal. In 2007 the American Water Resources Association (AWRA) presented her with the Mary H. Marsh Medal for exemplary contributions to the protection and wise use of the nation’s water resources.

She is a member of her township's environmental protection advisory board, on the Boards of the American Water Resources Association (AWRA) (President - 2013), the U.S. Water Alliance, and recent past chair of the Board for the Pinchot Institute for Conservation. She also teaches environmental management courses at the University of Pennsylvania and has published on environmental and water-related topics. She has testified before the House of Representatives and the Pennsylvania Legislature. In 2004 she was a member of a nine person U.S./China/Japan team to assist the Peoples Republic of China with river basin management. (Additional information about this project can be found on the Woodrow Wilson International Center for Scholars' web site; click here to view her paper [2.3 MB; free Adobe reader required].) She has also participated in water management and sustainable forest practice events along the Yangtze River in China and in the rain forests of Ecuador which involved building sustainable communities. She believes proper management of water resources is the key to our economic and environmental future.