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At Keegan Werlin, our attorneys bring a wealth of experience and deep legal knowledge to every case. Based in Lexington, MA, our team specializes in energy, environmental, public utility, and governmental law, representing clients in New England. We are committed to providing strategic, results-driven counsel, offering innovative solutions to navigate complex legal challenges in highly regulated industries. Our attorneys are dedicated to achieving successful outcomes tailored to client needs. Our Team Practical advice from a knowledgeable legal team. Cheryl M. Kimball Managing Partner & Chair of Energy & Regulatory Practice Read More David S. Rosenzweig Executive Partner & Chair of Energy Facilities Siting & Permitting Practice Read More Robert J. Keegan Chairman Emeritus Read More Molly K. Agostinelli Associate Read More Barry P. Fogel Partner Read More John K. Habib Partner Read More Robert J. Humm Partner Read More Catherine J. Keuthen Partner Read More Ashley S. Marton Associate Read More Jessica Ralston Partner Read More Danielle Winter Partner Read More Cheryl A. Blaine Partner Read More Steven Frias Associate Read More Erika J. Hafner Partner Read More Elizabeth Jameson Senior Counsel Read More Michael J. Koehler Partner Read More Sarah Pardee Associate Read More Tiffany N. Tisler Associate Read More Matthew Campbell Of Counsel Read More Jonathan A. Goldberg Senior Counsel Read More Michael B. Hershberg Associate Read More Joseph F. Kelley Associate Read More Peter E. Madsen Senior Associate Read More Kevin F. Penders Partner | Practice Manager Read More Brendan P. Vaughan Partner Read More Practice Areas Energy & Regulatory Law Energy Facilities Siting & Permitting Governmental & Legislative Relations Environmental, Municipal, & Land Use Learn More

Ms. Winter’s representation of electric and gas utilities before the Department of Public Utilities includes advocacy on issues relating to distribution rates, energy supply, renewable energy, grid modernization, system reliability, and service quality. Specifically, she has represented electric utilities in proceedings regulating the procurement of long-term renewable power, time varying rates, their continued modernization of the electric grid and the interconnection of distributed generation. Energy & Regulatory Law; Public Utilities Danielle (Rathbun) Winter is a partner at Keegan Werlin LLP specializing in energy and regulatory and public utility law. She represents a number of electric and gas utilities on issues concerning rates, planning, and energy procurement. Danielle Winter Phone: 617-951-1400 Email: dwinter@keeganwerlin.com ● Regulatory Law ● Energy Law ● Public Utilities Bar Admissions Massachusetts New York Ms. Winter’s representation of electric and gas utilities before the Department of Public Utilities includes advocacy on issues relating to distribution rates, energy supply, renewable energy, grid modernization, system reliability, and service quality. Specifically, Ms. Winter has represented electric utilities in proceedings regulating the procurement of long-term renewable power, time varying rates, their continued modernization of the electric grid and the interconnection of distributed generation. She has represented gas utilities in proceedings before the DPU regarding base distribution rates, cyber security and gas procurement and related issues. Prior to joining Keegan Werlin, Ms. Winter was an Assistant Attorney General in the Massachusetts Attorney General’s Office, Office of Ratepayer Advocacy. She was also an Assistant Counsel at the New York State Department of Public Service. Education Albany Law School, J.D. Binghamton University B.A. in Creative Writing, Comparative Literature and English Literature, minor in Spanish.

Matthew (“Matt”) Campbell focuses on energy and administrative law, with particular experience advising clients on complex regulatory and policy matters. He represents regulated entities in proceedings before state agencies, where he assists clients in navigating evolving regulatory frameworks, compliance obligations, and enforcement issues. Energy & Regulatory Law Matthew ("Matt") Campbell focuses on energy and administrative law, with particular experience advising clients on complex regulatory and policy matters. Matthew Campbell Phone: 617-951-1400 Email: mcampbell@keeganwerlin.com ● Energy Law ● Regulatory Law Bar Admissions Massachusetts New Hampshire Washington, D.C. He represents regulated entities in proceedings before state agencies, where he assists clients in navigating evolving regulatory frameworks, compliance obligations, and enforcement issues. Before joining Keegan Werlin, Matt served as Senior Legal Counsel at Unitil, where he advised leadership on regulatory strategy, compliance, and contract matters across Maine, Massachusetts, and New Hampshire. Matt also brings significant public-sector insight from his tenure as Chief of Staff at the Massachusetts Department of Public Utilities, where he advised the Commission on policy, legislation, and agency operations, and served as a primary liaison to state leadership and industry stakeholders. Earlier in his career, Matt worked extensively in the energy industry in strategic, analytical, and consulting roles, supporting major transactions, privatization efforts, and regulatory filings across the utility sector. Matt earned his J.D., magna cum laude, from New England School of Law, where he served as Technical Editor of the New England Law Review and received multiple academic honors. He holds a B.A. in English from the University of Massachusetts Amherst. He is admitted to practice in New Hampshire, Massachusetts, and Washington, D.C. Education New England School of Law, Boston, Massachusetts, J.D. University of Massachusetts Amherst, Massachusetts, B.A. English

Keegan Werlin LLP is a premier greater Boston-based law firm now headquartered in historic Lexington, Massachusetts. Specializing in energy, environmental, and public utility law, we serve clients across Boston and throughout New England with trusted legal counsel on complex regulatory matters. Practical advice from a knowledgeable and dedicated legal team. We take great pride in our ability to understand our client businesses, the environments in which they operate and their priorities for achieving success. We commit to client objectives at all stages of representation and know that, ultimately, there is no success without client success. If you would like to discuss a matter of interest, please contact us today. About Our Firm At Keegan Werlin LLP, we specialize in developing creative solutions to the complex challenges our clients encounter in their business environments. Keegan Werlin attorneys are industry leaders in energy and regulatory issues, project siting, licensing and permitting, environmental compliance and permitting, land use, government and legislative relations, municipal law and real estate. From start to finish, Keegan Werlin has unrivaled experience and knowledge of energy-related regulatory and policy matters and the project-development and permitting landscape. Experience & Expertise Keegan Werlin has a team of attorneys with unparalleled experience dealing with complex energy, real estate and regulatory issues. The firm combines its legal and regulatory expertise with a thorough understanding of the technical, strategic and financial challenges in emerging industries to provide successful and cost-effective representation of client interests. Learn More Practice Areas Energy & Regulatory Law Read more Governmental & Legislative Relations Read more Energy Facilities Siting & Permitting Read more Environmental, Municipal & Land Use Read more Partnerships

Prior to joining the firm, Mr. Frias served as Senior Legal Counsel to the Rhode Island Public Utilities Commission for two years. He then served as Executive Counsel of the Rhode Island Public Utilities Commission and Legal Counsel to the Rhode Island Energy Facility Siting Board for six years. Public Utility, Energy, & Administrative Law; Telecommunication Steven Frias is an associate at Keegan Werlin LLP. He specializes in public utility, energy and regulatory, telecommunications, and administrative law. Steven Frias Phone: 617-951-1400 Email: sfrias@keeganwerlin.com ● Administrative Law ● Energy Law ● Public Utilities ● Telecommunication Bar Admissions Massachusetts U.S. District Court District of RI Rhode Island Prior to joining the firm, Mr. Frias served as Senior Legal Counsel to the Rhode Island Public Utilities Commission for two years. He then served as Executive Counsel of the Rhode Island Public Utilities Commission and Legal Counsel to the Rhode Island Energy Facility Siting Board for six years. During his employment as Executive Counsel, he authored “Beyond 271 – From an Open Market to a Fully Competitive Market: A Roadmap for State Commissions,” for the NRRI Journal of Applied Regulation. Before entering public service, Mr. Frias served as an associate at Zizik, LaSalle & Power, P.C., specializing in litigation. Since 1999, Mr. Frias has taught Paralegals and the Litigation Team in Rhode Island, a seminar at the Institute for Paralegal Education. Memberships & Associations Rhode Island Bar Association R.I. Representative and Member of the RNC Budget Committee, Republican National Committee 2012 - 2024 Board Member, Cranston Historical Society 2009 - 2017 Contributing Opinion Columnist, Cranston Herald 2012 - 2013, 2019 - 2021 Contributing Opinion Columnist, Providence Journal 2013 - 2016 Commissioner, and President of Cranston City Planning Commission, 2021 - Present Treasurer, R.I. Semiquincentennial (250th) Commission, 2021 - Present Chairman, Cranston Charter Review Commission, 2019 - 2020 Published Works Cranston and Its Mayors: A History, The History Press, Charleston SC, 2011 Beyond 271 - From an Open Market to a Fully Competitive Market, NRRI Journal of Applied Regulation, 1, 2003 Flagrant Disregard for Tradition, Suffolk University Law Review, 30, 1997 Education Suffolk University Law School, Boston, Massachusetts, , J.D., cum laude, 1997 Law Review: Suffolk University Law Review, 1996 - 1997 Awards: Dean’s List 1995-97; Best Case Comment, Law Review Staff Competition, 1996; Semi-Finalist, Clark Appellate Advocacy Competition, 1996; Best Brief Writer, First Year Moot Court Section Competition 1995; Best Oral Advocate, First Year Moot Court Section Competition, 1995 Brown University, Providence, RI, B.A. Political Science and International Relations, 1993 Representative Cases NSTAR Electric Company, D.P.U. 17-05 NSTAR Gas Company, D.P.U. 19-120 NSTAR Gas Company, D.P.U. 20-76 Brookline, Case No. 9752 Classes & Seminars Paralegals and the Litigation Team in Rhode Island, Institute for Paralegal Education, 1999 - Present Recognitions Coolidge Prize for Journalism, 2015

Ms. Jameson’s other experience includes working at the Federal Energy Regulatory Commission as Attorney-Advisor to several administrative law judges, counseling on substantive legal and administrative issues in contested adjudicatory proceedings related to regulated electric transmission and natural gas pipeline companies. Administrative, Climate, & Energy Law; Public Utilities; Government Relations Elizabeth Jameson is senior counsel at Keegan Werlin LLP, specializing in energy facilities siting and permitting and government relations. Elizabeth Jameson Phone: 617-951-1400 Email: ejameson@keeganwerlin.com ● Public Utilities ● Energy Law ● Climate Law ● Administrative Law ● Government Relations Bar Admissions Massachusetts Before joining the firm in 2025, Ms. Jameson served as the Director of Climate Policy and Planning at the City of Boston, leading the development of climate policies and counseling senior officials on changes to energy siting and permitting laws and regulations, overseeing consultant work on energy transformation issues, and advocating for legislative changes related to energy affordability, competitive suppliers, and other energy-related issues. Prior to her role with the City of Boston, Ms. Jameson was the Deputy General Counsel for Energy and Climate at the Massachusetts Executive Office of Energy and Environmental Affairs where she directly advised three different Secretaries on substantive energy- and climate-related legal and regulatory issues, including advising the Secretaries in their capacity as Chair of the Energy Facilities Sitting Board on various energy infrastructure siting cases. Ms. Jameson's other experience includes working at the Federal Energy Regulatory Commission as Attorney-Advisor to several administrative law judges, counseling on substantive legal and administrative issues in contested adjudicatory proceedings related to regulated electric transmission and natural gas pipeline companies. Education Vermont Law and Graduate School Juris Doctor, 2018 Master's in Energy Regulation and Law, 2018 Symposium Editor, Vermont Journal of Environmental Law Advanced Energy Clinician, Institute for Energy and Environment University of Massachusetts, Amherst B.S. Environmental Science, 2015 Memberships Energy Bar Association New England Women in Energy and Environment

A major portion of Mr. Fogel's practice involves working with clients and their consultants to guide proposals for new or modified projects through all levels of environmental impact review and permitting including industrial and commercial facilities; energy and infrastructure projects; and other land uses and developments that require approvals for waste-site remediation, site review planning, waste discharges, air emissions, and resolution of liability disputes. Environmental, Land Use & Administrative Law; Litigation and Appeals Barry P. Fogel is a partner at Keegan Werlin LLP and became the initial member of its Environmental, Municipal and Land Use Practice. Barry P. Fogel Phone: 617-951-1400 Email: bfogel@keeganwerlin.com ● Environmental Law ● Land Use Law ● Administrative Law ● Litigation & Appeals Bar Admissions Massachusetts District of Columbia U.S. Court of Appeals First Circuit U.S. District Court District of MA Mr. Fogel's Clients include a wide variety of businesses, institutions, municipalities, individuals, and citizen groups engaged in land use development, real estate transactions, and permit and enforcement proceedings involving compliance with federal, state, and local environmental and land use regulations. A major portion of Mr. Fogel's practice involves working with clients and their consultants to guide proposals for new or modified projects through all levels of environmental impact review and permitting including industrial and commercial facilities; energy and infrastructure projects; and other land uses and developments that require approvals for waste-site remediation, site review planning, waste discharges, air emissions, and resolution of liability disputes. Mr. Fogel has extensive experience with projects that require permits and licenses for activities in and near inland and coastal wetlands and other protected resource areas. He also regularly manages cases involving administrative appeals, resolution of enforcement notices, and civil disputes involving litigation and mediation. Prior to joining the firm in 1991, Mr. Fogel worked for six years as a Deputy General Counsel and Regional Director with the Massachusetts Department of Environmental Protection. Before that, he served as Counsel to the District of Columbia City Council's Committee on Transportation and Environmental Affairs, and as counsel to the Chairman of the Washington Metropolitan Area Transit Authority. Representative Cases Verrill Farms, LLC v. Farm Family Casualty Insurance Company, 86 Mass.App.Ct. 577 (2014) Ten Persons of the Commonwealth et al. v. Fellsway Development LLC et als., 460 Mass. 366 (2011) Brockton Power Company LLC vs. City of Brockton & others, Appeals Court Docket No. 2012-P-214, Memorandum and Order Pursuant to Rule 1:28; by the Court (Kantrowitz, Sikora & Sullivan, JJ.), November 21, 2012 Education American University, Washington College of Law, Washington, D.C., J.D., 1982 Wesleyan University, Middletown, Connecticut, B.A., Geology and Earth Sciences, 1976 Conservation Commission of Brockton vs. Department of Environmental Protection & another, Appeals Court Docket No. 2011-P-766 (April 19, 2012) Brockton Power Company, LLC v. Planning Bd. of City of Brockton, 2011 WL 3655178 (Mass.Land Ct.), August 19, 2011

Ms. Tisler received her Juris Doctor from The University of Toledo College of Law with a Certificate in Environmental Law. While in law school, Ms. Tisler participated in Moot Court and was the Assistant Managing Editor of The University of Toledo Law Review.  Ms. Tisler authored and co-authored two environmental law articles published in The University of Toledo Law Review. Administrative & Energy Law; Public Utilities Ms. Tisler advises public utilities on legal and regulatory issues related to energy procurements, renewable energy, grid modernization, energy efficiency, and rate cases. Tiffany N. Tisler Phone: 617-951-1400 Email: ttisler@keeganwerlin.com ● Administrative Law ● Energy Law ● Public Utilities Bar Admissions Connecticut U.S. District Court of Connecticut Prior to joining the firm, Ms. Tisler worked as a Staff Attorney at the Connecticut Public Utilities Regulatory Authority, advising on proceedings related to renewable energy, electric vehicles, energy affordability, reliability and resilience, grid modernization, rate adjustments, annual reconciliations, revenue requirements, company restructuring, and investigations. Ms. Tisler completed a Certificate in Financing and Deploying Clean Energy from Yale University. Ms. Tisler also has experience in civil litigation and court operations. Ms. Tisler received her Juris Doctor from The University of Toledo College of Law with a Certificate in Environmental Law. While in law school, Ms. Tisler participated in Moot Court and was the Assistant Managing Editor of The University of Toledo Law Review. Ms. Tisler authored and co-authored two environmental law articles published in The University of Toledo Law Review. Ms. Tisler received her Bachelor of Arts in political science, zoology, and environmental science from Miami University in Oxford, Ohio. In addition to her professional accomplishments, Ms. Tisler maintains an interest in international travel and experiences after living and working abroad for several years. Education Yale University, Certificate in Financing and Deploying Clean Energy, 2022 The University of Toledo College of Law, J.D., 2011, cum laude Miami University, B.A. in Political Science, Zoology, and Environmental Science, 2008, magna cum laude

Ms. Ralston’s representation of utilities includes advocacy on issues related to energy supply, system reliability, and renewable energy. She has rejoined the firm after spending two years as regulatory counsel for Pacific Power where she represented the company before the utility commissions in California, Oregon and Washington on matters related to resource planning and procurement. Administrative, Energy, & Regulatory Law Jessica (Buno) Ralston is a partner at Keegan Werlin LLP, specializing in energy, regulatory and public utility law. Jessica (Buno) Ralston Phone: 617-951-1400 Email: jralston@keeganwerlin.com ● Administrative Law ● Energy Law ● Regulatory Law Bar Admissions Illinois New York Massachusetts Rhode Island New Hampshire Oregon Ms. Ralston’s representation of utilities includes advocacy on issues related to energy supply, system reliability, and renewable energy. She has rejoined the firm after spending two years as regulatory counsel for Pacific Power where she represented the company before the utility commissions in California, Oregon and Washington on matters related to resource planning and procurement. Prior to joining the Keegan Werlin in 2012, Ms. Ralston was a Hearing Officer at the Massachusetts Department of Public Utilities overseeing proceedings related to natural gas and renewable energy contracts. Previously, she was an associate at the Steinverzel & Levy Law Group P.C. in White Plains, New York where she practiced environmental law, construction law, and litigation. Ms. Ralston received her Juris Doctor from the Elisabeth Haub School of Law at Pace University with a Certificate in Environmental Law. While in law school, Ms. Ralston interned with the U.S. Environmental Protection Agency and New York State Department of Environmental Conservation. Prior to law school, Ms. Ralston received her Bachelor of Arts degree in Environmental Studies and Psychology from Wellesley College. Ms. Ralston is a co-author of Municipalities and Natural Gas Extraction... What the Frack?, New York Law Journal (2012). Education Pace University School of Law, White Plains, New York, J.D.,2008, Certificate in Environmental Law Wellesley College, Wellesley, MA, B.A. Environmental Studies and Psychology, 2005 Memberships Boston Bar Association

Mr. Vaughan received his Juris Doctor from Boston College Law School. While attending Boston College Law School, he worked as a Judicial Intern for The Honorable F. Dennis Saylor, IV, of the United States District Court for the District of Massachusetts. After his first and second years of law school, Mr. Vaughan worked for the Middlesex District Attorney’s Office and as a summer associate for Keegan Werlin. Administrative & Energy Law; Public Utilities Brendan P. Vaughan is a partner at Keegan Werlin LLP specializing in energy, regulatory, and public utility law. He represents energy and utility clients before administrative agencies such as the Massachusetts Department of Public Utilities and the Connecticut Public Utilities Regulatory Authority. Brendan P. Vaughan Phone: 617-951-1400 Email: bvaughan@keeganwerlin.com ● Administrative Law ● Energy Law ● Public Utilities Bar Admissions U.S. District Court District of MA Connecticut Massachusetts Mr. Vaughan received his Juris Doctor from Boston College Law School. While attending Boston College Law School, he worked as a Judicial Intern for The Honorable F. Dennis Saylor, IV, of the United States District Court for the District of Massachusetts. After his first and second years of law school, Mr. Vaughan worked for the Middlesex District Attorney’s Office and as a summer associate for Keegan Werlin. Mr. Vaughan received his Bachelor of Arts in political science, cum laude, from Salve Regina University in Rhode Island. At Salve Regina University, he was a member of the Pi Sigma Alpha National Political Science Honor Society and a Chi Alpha Sigma National College Athlete Honor Society Honoree. He brings a wide berth of experience to the firm; before joining the firm in 2016, Mr. Vaughan practiced law at Campbell Campbell Edwards & Conroy, handling civil litigation matters, and Northern LNG LLC, a small energy start-up. Education Boston College Law School, Boston, Massachusetts, J.D., 2014 Salve Regina University, Newport, Rhode Island, B.A. Political Science, 2011 Member, Pi Sigma Alpha National Political Honor Society; Honoree, Chi Alpha Sigma National College Athlete Honor Society

Ms. Marton served as Articles Editor for the International Law Journal at Boston University School of Law. Ms. Marton’s note, The Failure of Corporate Social Responsibility Provisions within International Trade Agreements and Export Credit Agencies as a Solution, 35 B.U. INT’L L.J. (2017), was published by the International Law Journal. Energy Law & Public Utilities Ashley S. (Wagner) Marton is an associate in Keegan Werlin LLP’s energy & regulatory practice, specializing in energy and public utility law. Ashley S. Marton Phone: 617-951-1400 Email: amarton@keeganwerlin.com ● Energy Law ● Public Utilities Bar Admissions Massachusetts Ms. Marton received her Juris Doctor from Boston University School of Law. After completing her first year of law school, Ms. Marton worked at the Irish International Immigrant Center in Boston, Massachusetts. While attending law school, Ms. Marton worked as a law clerk for Keegan Werlin. Ms. Marton served as Articles Editor for the International Law Journal at Boston University School of Law. Ms. Marton’s note, The Failure of Corporate Social Responsibility Provisions within International Trade Agreements and Export Credit Agencies as a Solution, 35 B.U. INT’L L.J. (2017), was published by the International Law Journal. Ms. Marton received her Bachelor of Arts in International Studies and Latin American Studies from the University of San Francisco. Education University of San Francisco, San Francisco, California, B.A., 2013 Boston University School of Law, Boston, Massachusetts, J.D., 2017

Joseph Kelley received his Juris Doctor from the University of Massachusetts School of Law. Following his second year of law school, he worked at Keegan Werlin as a Law Clerk helping on numerous matters, primarily aiding with monitoring hearings conducted by the Joint Committee on Telecommunications, Utilities and Energy. During his third year of law school, he interned at Pateakos & Poulin, where he assisted with civil litigation, real estate transactions, and estate planning. Administrative & Energy Law; Public Utilities Joseph F. Kelley joined the practice in September of 2024 as an associate attorney, specializing in administrative, energy, and public utility law. Joseph F. Kelley Phone: 617-951-1400 Email: jkelley @keeganwerlin.com ● Administrative Law ● Energy Law ● Public Utilities Bar Admissions Massachusetts Joseph Kelley received his Juris Doctor from the University of Massachusetts School of Law. Following his second year of law school, he worked at Keegan Werlin as a Law Clerk helping on numerous matters, primarily aiding with monitoring hearings conducted by the Joint Committee on Telecommunications, Utilities and Energy. During his third year of law school, he interned at Pateakos & Poulin, where he assisted with civil litigation, real estate transactions, and estate planning. Education Worcester State University, B.A., May 2020 University of Massachusetts School of Law, J.D., 2024