Management Team

Mark Hellstein - President and Chief Executive Officer

Mark started ECS in 1982 out of the basement of his parents' home.  Prior to that, he was part of a team at Hamilton Standard that was working on a project funded by the Environmental Protection Agency (EPA) to develop new industrial pretreatment standards.  When the funding was discontinued, he left Hamilton Standard to "do his own thing."  After a year of struggling, ECS was established with the basics: a shovel, a pickup truck, and a thorough understanding of the new regulations that stipulated what companies were and weren't allowed to release into the air, ground and water.

Three decades later, Mark sits at the helm of an employee-owned company with 12 offices, 200 professionals, divisions focusing on specialized services such as alternative energy and fuel systems management, and true differentiators such as an in-house, 24/7 response management hotline.  

ECS prides itself on being the sort of company that embraces the entrepreneurial spirit and encourages its employees to do the best that they can, and Mark is the true embodiment of this philosophy.

Kevin Sheehan, PE, LSP, LEP - Corporate Operating Officer

Kevin has been an integral part of the ECS team since 1989.  He has 30 years of experience in providing technical expertise and regulatory insight for clients regulated by the Massachusetts Contingency Plan (MCP), the Resource Conservation and Recovery Act (RCRA), and the Comprehensive Environmental Response, Compensation and Liability Act (CERCLA). He played a major role in establishing what is now the Bureau of Waste Site Clean-Up group in the Western Regional Office of the Massachusetts Department of Environmental Protection. He was also involved in the writing of the original MCP that was promulgated in 1988. Kevin has managed hundreds of projects ranging from property transfer site assessments to hydrogeological assessments of large industrial facilities.

Additionally, he provides technical guidance and mentoring for ECS staff, guidance on corporate strategy, and oversees corporate major account relationships.  Kevin is also responsible for the firm's Health and Safety department.

Kevin is a Massachusetts Licensed Site Professional (LSP), a Connecticut Licensed Environmental Professional (LEP), and a Professional Engineer (PE) in Massachusetts, Connecticut, Vermont, Florida, and North Carolina.

Douglas McVey - Chief Financial Officer

While working as an environmental technician on a major petroleum account for a competitor, Doug found himself drawn to the entrepreneurial spirit of ECS and made the move in April 1999. He went to work at ECS’ Brattleboro, Vermont office, which at the time was a rambling red barn situated on acres of farmland. As a project manager, Doug focused on site assessment and brownfield redevelopment services for municipalities, private developers and community development corporations.

Doug transferred to ECS’ headquarters in Agawam, Massachusetts in early 2000 and took on the responsibility of managing the company’s site assessment group. That same year, with the assistance of ECS, he completed his Masters of Business Administration degree.

Upon his return from a two-month sabbatical hiking along the Appalachian Trail from Maine to Massachusetts, Doug began managing ECS’ accounting department and became Controller and Business Manager. The company was growing quickly at the time, and Doug’s shrewd business planning was a key factor in ECS acquiring another environmental firm in late 2002.

Doug’s financial leadership over the next few years led to him becoming ECS’ Chief Financial Officer in January 2008. He continues to manage the company’s accounting group and is also the ESOP trustee on the Board of Directors.  He is also responsible for the firm's Human Resources department.

Michael Fiorini - Treasurer/Senior VP, Business Development

Mike joined ECS in 1989 as Chief Financial Officer (CFO) and was tasked with developing financial systems and reporting mechanisms for a business that was still getting off the ground at the time. “When I came in 1989,” Mike says, “we only had two computers, and people had to take turns writing their field reports.”

As the company began to grow, Mike took on the responsibilities of managing ECS' banking, insurance and human resource functions. When the building that now serves as corporate headquarters was constructed in 1990, he obtained the financing and oversaw all aspects of the development. For the next 17 years, Mike's financial direction and expertise led to the start-up of 11 branch offices and the acquisition of a handful of small businesses.

In late 2007, as part of a senior management transition plan and in conjunction with the implementation of ECS' Employee Stock Ownership Program (ESOP), Mike relinquished the title of CFO to Doug McVey . Mike continues to serve as ECS' Treasurer and in that capacity oversees the company's financing and insurance relationships. As Senior Vice President for Business Development, he is responsible for the firm's Marketing department as well.  He is also a member of the Board of Directors.

Dan Felten, PE, LSP, LEP - Senior VP, Technology

Dan has almost three decades of experience in environmental and energy related consulting, contracting and remediation, and he has been a part of the ECS team since 1999.  As our Senior Vice President for Technology, Dan is primarily responsible for technical program implementation and training, as well as new product development. He also oversees the firm's Information Technologies department.

Dan's project experience includes all facets of environmental assessment and remediation for petroleum and solvent releases, compliance/permitting for petroleum and industrial facilities, inspection of aboveground and underground storage tanks, and the design and installation of ground source geothermal systems. 

He is a Massachusetts Licensed Site Professional (LSP), a Connecticut Licensed Environmental Professional (LEP), and a Professional Engineer (PE) in Massachusetts, Connecticut, New Hampshire, Maine, and North Carolina.

Dan is also an adjunct professor at Greenfield Community College in Greenfield, MA in the Alternative Energy Program.

Jon Berntsen, PG - Senior VP, Regional Manager

Jon is ECS' Senior Vice President in charge of Regional Management for the firm's Florida, North Carolina and Ohio locations. He has 16 years of consulting experience and has completed numerous projects in Florida, Vermont, New Hampshire, New Jersey, New York and Connecticut related to water supply development and rehabilitation and groundwater contamination investigation and remediation.  He has also served as Environmental Professional (EP) on hundreds of Phase I and II Environmental Site Assessments.  Jon also has vast experience with petroleum emergency spill response, insurance claims investigations, and underground storage tank management.

Jon began his career with ECS in 2000 in our northern Vermont office, which was located in Richmond at the time.  He relocated to our Tampa office in 2003.  Jon holds a B.S. degree in Environmental Geology, and he is a registered Professional Geologist (PG) in New Hampshire.

Bill Alpine - Director of Cost Recovery/Internal Counsel

Bill provides corporate legal guidance to ECS' 200+ employees and oversees the firm's state reimbursement claims management program. He is also responsible for all matters pertaining to Real Estate and Facilities.  Prior to joining ECS in 2005, Bill worked for the Commonwealth of Massachusetts for 17 years, the last 12 of which he served as Executive Director of the Massachusetts Underground Storage Tank Cleanup Fund.  He also served as co-chair of the State Fund Administrators Task Force.  Bill earned his Bachelor's degree in Marine Engineering from the Massachusetts Maritime Academy, and his Juris Doctorate from Suffolk University.