Our Team

Meet our executive staff


Frank P. Castellano, PG, President
Frank P Castellano is the Principal and Founder of Castleton Environmental Geologic Services, DPC Inc., an environmental consulting licensed New York State professional services firm that provides high value and high value environmental consulting and risk management services specifically geared to the commercial lending and real estate investment/management industries. Prior to creating Castleton in 2015, Mr. Castellano spent 23 years leading of the region’s most accomplished and diverse environmental consulting firms. He holds a Bachelor’s of Science Degree in Water Resources from State University of New York at Oneonta and a Master’s of Science Degree in Hydrogeology from Adelphi University. Frank is a licensed New York State qualified Professional Geologist and Licensed Real Estate Sales Professional. He is also a member of Long Island Business Development Council and Long Island Real Estate Group. Frank has more than half a dozen publications to his name, with most recent in 2018, on the topic: A Look at Soil Vapor Intrusion Regulations and their Impact on Real Estate Transactions (Society of Chief Appraisers NY Conference). He has been widely acknowledged for his work on Environmental Consultancy and Site Assessment a wide array of environmental projects for various clients.
Donald J. Middleton, Jr., Vice President
Donald J. Middleton Jr. is a versatile entrepreneur and an expert Environmental Consultant. For the last 18 years, Donald has been President at Middleton Environmental, Inc. Under his able leadership and exceptional Managerial guidance Middleton Environmental has prepared thousands of Environmental Site Assessment and Transaction Screen Process Reports on commercial, industrial and multi-family properties for lending institutions. Donald’s experience in the field of Environmental Consultancy far surpasses his association with MEI; he has been in the field for over 27 years. His areas of expertise include Phase 1 Environmental Site Assessment, Transaction Screens and Environmental Due Diligence and Risk Management. Donald holds a Bachelor’s of Science Degree in Finance from Fordham University. He is a Licensed Real Estate Professional and also affiliated with Long Island Business Development Council. With decades of experience in the field, an understanding of the banking and finance industry and entrepreneurial know-how, Donald decided to cash on the opportunity has expanded the breadth of services provided to his clients by and establishing Castleton Environmental, Inc. Geologic Services, DPC with his longtime associate, Mr. Frank P. Castellano. Donald currently serves as a Vice President of Castleton Environmental, Inc. and pursues his dream of providing an even broader range of high quality environmental consultancy services.
Jessica Ferngren, Senior Consultant
Jessica Ferngren is an accomplished Project Manager with over 18 years of experience in the Environmental Consultancy Industry., working with 6 reputable organizations. Her area of expertise includes Environmental Program Management, Hazardous Waste Investigation and Environmental and Regulatory Compliance. She holds a Bachelor’s of Arts Degree in Geological Sciences from State University of New York at Geneseo. Ms. Ferngren is a licensed Professional Geologist and has a certification in RCRA Training and Loss Prevention Systems (LPS). She is also affiliated with Long Island Association of Professional Geologists (Co-President 2014-15) and American Institute of Professional Geologists. Managing the remediation of a Portfolio of 40 Management of Retail Service Station facilities of 40 formal retail service stations and the performance of Phase II Environmental Site Assessments and Investigation for hundreds of properties are some of her distinguished projects accomplishments. She is currently serves as Senior Consultant working for Castleton Environmental Geologic Service, DPC Inc. as Senior Project Manager where she leads the firm’s Phase II Environmental Site Assessment and Risk Management practice areas.
Joseph Chiappetta, Senior Consultant
Joseph Chiappetta enjoys over 19 years of experience in the Environmental Consulting Industry serving in excess of a thousand clients across 22 states and 7 countries and has directed over $2 billion in environmental projects. Joseph has a Bachelor’s of Science Degree in Geological Sciences from Allegheny College and a Master’s of Business Administration Degree in Project Management from Florida University of Technology. Joseph was among the first few to be issued a license by the State of New Jersey under its Licensed Site Remediation Professional (LSRP) program and has a certification from NJDEP certified Subsurface Evaluator and UST Closure. He is also affiliated with Licensed Site Remediation Professional Association and Commerce and Industry Association of New Jersey. His areas of expertise include Environmental Program Management, Hazardous Waste Investigation and Cleanup and Environmental & Regulatory Compliance. Mr. Chiappetta has been widely acknowledged and appreciated for the successful negotiated closure of numerous Superfund, ISRA, BUST, and MOA cases. He has been involved with several USEPA superfund and NJDEP Hazardous Discharge Site Remediation Fund (HDSRF) Sites. Joseph currently serves as Senior Project Manager for Castleton Environmental Geologic Services, DPC Inc. where he leads the firm’s projects in the metropolitan New York region.
Brian Barth, Senior Project Manager
Brian Barth is an Environmental Project Manager with expertise in Site Assessment, Data Management and Environmental and Regulatory Compliance. He has a Bachelor’s Degree in Environmental Science from State University at Albany and a Master’s Degree in Environmental Technology from New York Institute of Technology. Mr. Barth is a member of Long Island Association of Professional Geologists and New York State GIS Association. He is a registered Environmental Professor and also has certifications in Geographic Information Systems and Spatial Analysis. In his 10 years of professional career Brian has worked with three different organizations and numerous clients on diversified environmental projects.. He has been a part of many Site Assessment and Investigation projects and Always with an eye toward advancing the goals of the Client, Brian has made valuable contributions in the management of several remedial actions in support of site re-development. Brian currently works for Castleton Environmental Geologic Services, DPC as Senior Project Manager where he is responsible for the management of a variety of Phase II Environmental Site Assessment and Brownfield Cleanup Program projects.