Thomas A. Mackie

        Counsel

        Thomas is one of the preeminent attorneys in the field of environmental law, having spent more than four decades representing clients facing complex environmental issues. His work has focused on permitting and siting of solid waste, recycling, and renewable energy facilities; cleaning up hazardous waste; acquiring brownfields properties; drafting and contracting for private and public environmental projects; recovering costs under CERCLA and M.G.L. c. 21E; pursuing insurance claims for environmental damages; and litigating permit appeals.

        Tom helps clients develop strategies to address regulators’ and the public’s concerns about the siting or expansion of controversial facilities. Purchasers and developers of renewable energy facilities, such as solar, landfill gas, biomass, anaerobic digestion, and biofuel manufacturers, rely on Tom to advise on required permits and approvals. In addition to handling the state and local permitting required for these and other projects, he assists clients with renewable energy credits, contracting, financing, and public procurement issues.

        For national clients, he has led environmental due diligence for several major corporate acquisitions and divestitures in the environmental industry. Recently, Tom and colleague Gail Hire spearheaded environmental due diligence for a client’s acquisition of the tax equity interest in over $100M of solar projects in Massachusetts. Together with Peter Durning and Peter Vetere, Tom assisted a national solid waste client in expanding its operations through a series of acquisitions in Massachusetts. Tom also assisted a major client in evaluating its Superfund liabilities prior to its $1.25 billion acquisition of a national hazardous waste and oil re-refining business. In another transaction, he led his former firm’s participation in environmental due diligence and permit transfers for more than 50 licensed hazardous waste facilities across 31 states and Canada.

        Many of Tom’s clients are sophisticated national players in their respective industries. In those cases, Tom’s role is to advise the client on the specifics of Massachusetts law and policy, as well as the regulatory agencies with which the client will interact. He also represents smaller local clients, unfamiliar with the lay of the land in environmental law. Tom begins his client engagements by understanding the client’s legal and business needs. He helps clients understand both the broader dynamics and the more granular details of their situations. Together, Tom and his client will identify a range of options and solutions, timelines, potentialities, and realistic outcomes – including end dates, risks, and costs. After a course has been set, Tom tenaciously pursues his client’s goals.

        Tom serves on the Commonwealth’s MassDEP Solid Waste Advisory Committee. As part of his pro-bono work, he serves as Chairman of the Board of Directors of Keep Massachusetts Beautiful. He has also done pro bono work for Greenwood Memorial United Methodist Church and won an award for his work on the Boston Marathon Victim Assistance Project.

        Services/Industries

        Education

        • Suffolk University Law School  (J.D., cum laude)
        • Hobart College  (B.S.)

        Public Service

        • Commonwealth of Massachusetts MassDEP, Solid Waste Advisory Committee
        • Keep Massachusetts Beautiful, President of the Board of Directors

        Bar Admissions

        • Massachusetts
        • New York

        Memberships

        • Solid Waste Association of North America (Southern New England)
        • MassRecycle

        Honors

        • Recognized in Chambers USA: America’s Leading Lawyers for Business under Massachusetts Environmental Law
        • The Best Lawyers in America®  under Environmental Law and Litigation – Environmental (2006-2027)
        • Lawdragon Green 500: Leaders in Environmental Law (2023–2026)
        • Steven G. Lewis Award for Service to the Environmental Industry, Environmental Business Council
        • Massachusetts Super Lawyers (2004-2023)

        Learn more about the third-party ratings, rankings, and selection processes used for inclusion.

        Firm Highlights

        Published Works

        Four Verrill Attorneys Co-Author Massachusetts Trends and Developments Chapter for Chambers and Partners Child Relocation 2026 Guide

        Verrill attorneys Mary H. Schmidt, Rachel A. Deering, Hannah R. Zukoff, and Mariah G. Tappan co-authored the “Trends and Developments” chapter...
        Blog

        A New Protected Class in Maine: Holders of Final Protection Orders

        In the lead-up to Domestic Violence Awareness Month in October, employers may be taking a closer look at how their policies and practices respond to...
        Alerts and Newsletters

        Verrill Secures SJC Victory for Boston Legacy FC in White Stadium Litigation

        Verrill has secured a significant appellate victory for Boston Legacy FC in the litigation challenging the redevelopment of White Stadium in...
        Blog

        Hurry Up and Wait

        This is the third in a series of Verrill blog posts on Maine’s packaging extended producer responsibility (“EPR”) law[1]. In July we reported...
        Media Mentions

        Robert Keach Discusses First Brands Chapter 11 Case in Law360

        Verrill attorney Robert Keach was recently quoted in a Law360 article examining the rejection of First Brands Group's Chapter 11 plan and the...
        Media Mentions

        Cybersecurity and AI Governance: Scott Anderson Featured in Massachusetts Lawyers Weekly

        Verrill Managing Partner Scott Anderson was recently featured in Massachusetts Lawyers Weekly discussing how law firms can build attorney buy-in for...
        Blog

        Section 530A Account Update: ERISA Status of Trump Accounts

        The Department of Labor has issued important guidance addressing whether employer programs that permit contributions to Section 530A accounts (and...
        Press Releases

        97 Verrill Attorneys Recognized by Best Lawyers® 2027, Including Four Named Lawyers of the Year

        AUGUSTA, Maine, BANGOR, Maine, BOSTON, Mass., PORTLAND, Maine, and WESTPORT, Conn., (August 20, 2026) – Verrill is proud to announce that 97...
        Alerts and Newsletters

        SEC’s Proposed “Reg Crypto”: What Founders Need to Know

        Startup founders and emerging-growth companies have a number of options for raising capital under the federal securities laws, including Regulation D...
        Blog

        After 45 Years, the IRS Speaks on DCAP Nondiscrimination Testing – And It’s Good News

        Employers that provide a Dependent Care Assistance Program will be pleased to learn that for the first time in 45 years, the IRS has issued guidance...
        Media Mentions

        U.S. Courts Highlights Annabel Rodriguez’s Journey from Fellow to Mentor

        Verrill attorney Annabel Rodriguez was featured in a recent U.S. Courts article titled “From Fellows to Mentors: Alumni Share Lasting Lessons from...
        Media Mentions

        Robert Keach Discusses Bankruptcy Auction Strategy in Law360

        Verrill attorney Robert Keach spoke with Law360 article examining the complex bankruptcy auction process that resulted in the sale of 23 summer...