Expert guidance, tailored for you.

Quality Representation, Personal Attention

Since 1988, John S. Cossum has provided exceptional legal service to clients in a variety of legal areas, with a concentration in criminal defense, family law and complex commercial litigation. Mr. Cossum provides each client who hires him quality representation and personal attention. As a client, you will take comfort in the knowledge that Mr. Cossum, an AV Preeminent rated attorney for almost 30 years, will personally handle every phase of your case, and that you will never be handed off to a less experienced attorney at any phase of the proceeding.

Admission Details

  • State Bar of Texas
  • State Bar of Arizona
  • U.S. District Court for the Southern and Eastern Districts of Texas
  • U.S. District Court for the District of Arizona
  • U.S. Court of Appeals for the Fifth Circuit
  • U.S. Court of Appeals for the Ninth Circuit

Education

  • University of Texas at Austin, Class of 1981, J.D.
  • Vanderbilt University, Class of 1978, B.A. History, Cum Laude Graduate
Martindale hubbell has been peer rated for highest level of professional excellence
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Championing Your Rights

At The Law Offices of John S. Cossum, our mission is to provide exceptional legal representation with a commitment to integrity, justice, and personalized service. We strive to protect the rights of our clients and achieve the best possible outcomes through diligent preparation, strategic thinking, and unwavering advocacy. Our goal is to not only navigate the complexities of the legal system on your behalf but to also ensure that you feel supported and informed every step of the way. Whether defending against serious criminal charges, guiding you through family law matters, or resolving business disputes, we are dedicated to being the steadfast advocates you can rely on in your time of need.

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Erin T. Fontana - Attorney at Law

Erin T. Fontana is an empathetic and experienced Attorney at Law whose passion lies in helping individuals and families navigate the complexities of planning for the future. With a background in Business and Bankruptcy Restructuring, Erin discovered her true calling in guiding clients through life's tough legal discussions. Her commitment to client well-being is evident in her belief that she is always just a call away for any question or concern. Erin's dedication extends beyond her legal expertise, as she actively participates in community organizations. With seven years of experience at Warren & Fontana, LLC, Erin's journey reflects her swift ascent to partner status, showcasing her comprehensive and personalized approach to legal services. Erin Fontana is not just an attorney; she is a trusted advocate and resource for those seeking guidance in securing a thoughtful and secure future for their loved ones.

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Professional Development

Education

Graduated magna cum laude from Washington and Lee University with a dual degree in Economics and Romance Languages. Earned her Juris Doctorate from Boston College Law School, graduating summa cum laude while acting as a Senior Editor of the Boston College Law Review.

Experience

Erin has practiced estate planning, probate administration, long-term care planning and residential real estate for the past 7 years. She clerked for the Honorable Peter J. Walsh Chief Judge of the United States Bankruptcy Court for the District of Delaware. And was an Associate in the Bankruptcy and Business Restructuring Group of Ropes & Gray, LLP.

Community

Erin is an active participant in the Medfield Community and has spent numerous years serving on the Executive Boards of the New ‘N Towne Club of Medfield, Inc., the Ralph Wheelock and Dale Street School PTOs, and the Medfield Coalition for Pubic Education.

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