Ms. Mary Sharrett has over 30 years of engineering and environmental consulting experience and specializes in bringing projects from concept through final construction. She became sole owner of STONE in 2014, managing all aspects of the firm (environmental, engineering, GIS, ecological, and industrial compliance). She is skilled in Project Management for large-scale projects, possessing excellent leadership, organizational, and project management skills. Mary is responsible for managing a team of professionals, allocating staff resources for STONE, and managing a variety of subconsultants and subcontractors. Since taking over the leadership of STONE, the firm has increased in size, revenue, and profitability through clear communication, enhanced collaboration, commitment to quality, and responsive service to clients. In 2018 STONE was awarded ODOT’s DBE Consultant of the Year for the firm’s professionalism, integrity in work standards, and performance.

Ms. Frances Rourke has more than 29 years of experience in the transportation industry and a deep knowledge of roadway and bridge design and plan preparation.  She leads the Engineering Team at STONE, whose capabilities include a multitude of engineering design services with engineers of diverse backgrounds and decades of experience.

Mr. Scott Ross has over 22 years of environmental consulting experience and is certified as a Professional Wetland Scientist (PWS) and a Certified Professional in Erosion & Sediment Control (CPESC).  As Ecological Services Manager, he leads a team of ecologists and natural resources staff who specialize in natural resource and ecological studies designed to meet the NEPA regulations. This ranges from anti-degradation stream, wetland, and water quality studies to endangered species surveys to cultural resources.

Ms. Samantha Robbins has over nine years of environmental consulting and engineering experience including environmental compliance review and monitoring, waterway permitting, agency coordination, and stormwater inspection and SWPPP review.  In her role as Compliance Services Manager she leads a team of environmental compliance staff who assist our clients with all types of compliance, from stormwater inspections and sampling to management of permit conditions for construction or daily operation.

Dr. Michael Hoggarth, Professor in the Department of Biology and Earth Science at Otterbein University, is joining the STONE team as Principal Ecologist. He received his B.S. in Biology from Seattle Pacific University, his M.S. in Biology from the University of North Alabama, and his Ph.D. in Zoology from The Ohio State University, where he specialized in freshwater mussel ecology and systematics. He was an Environmental Scientist with the Ohio Department of Transportation, Bureau of Environmental Services from 1987-1992. He has published extensively on the life history, ecology, and systematics of mussels in the family Unionidae, including numerous peer-reviewed papers, and he is co-author of a book entitled, The Freshwater Mussels of Ohio (2009). Since leaving ODOT, he has performed thousands of aquatic assessments and mussel surveys in partnership with many ecological, environmental, and engineering firms across the Midwest. He has been a member of the Ohio Academy of Science since 1980, a Fellow of the Academy since 1999, and was President of the Academy from April, 2014 to April, 2016.