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Paul Callahan is an experienced environmental services leader currently serving as Principal at Burns & McDonnell since June 2013, where responsibilities include national strategy and business development along with managing complex permitting projects. Prior experience includes roles as Strategic Growth Principal at SWCA Environmental Consultants, President of CP Callahan Inc., and Vice President at PBS&J, focusing on business development and project management in various markets. Paul Callahan also founded and led Land & Water Consulting as President/Owner. Educational qualifications include a Master of Science in Hydrology-Watershed Science-Forestry from the University of Montana and a Bachelor of Arts in Chemistry from Gettysburg College.