Mark Callaghan is a Senior Project Manager with CH2M HILL out of the Washington, DC office; and is the project manager for the ongoing site-wide remedial investigation at the former Raritan Arsenal. A former well site geologist who has drilled oil wells throughout the world, Mr. Callaghan has over 17 years of experience managing site characterization and remediation projects through all stages of the CERCLA process. Mr. Callaghan has extensive regulatory experience, and specializes in the management of munitions response and chemical warfare projects for CH2M HILL. Mr. Callaghan holds a BS in Geology from the University of Leicester, and a MS in Geology/Micropaleontology from University College London, England.