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Mark Drollinger, M.Eng, CSP, CHMM is a seasoned professional in engineering and environmental sciences with extensive experience in leadership and project management. Currently serving as Principal of the Engineering and Environmental Sciences Division at Citadel Environmental Services, Inc. since February 2011, Mark oversees daily operations, staff development, and client relationship management. Previous roles include Safety Manager at KEAR Civil Corporation, Project Engineer at Environmental Engineering & Contracting, Owner/Program Manager at Wolverine Environmental, Senior Staff Engineer at Ninyo & Moore, Environmental Engineer at RESNA Industries, and Staff Engineer at Kennedy/Jenks Consultants. Mark holds a Master’s degree in Advanced Safety Engineering and Management from the University of Alabama at Birmingham and a Bachelor’s degree in Applied and Natural Sciences from The University of Alabama.