Area of Practice: Commercial Litigation Jeffrey M. Eilender is the co-managing partner of the firm and co-chair of the civil litigation group. His commercial litigation practice focuses on intra-corporate disputes and business separations, often when the future of the company or an owner’s net assets are at risk. These cases are usually hotly contested and, unfortunately, often involve adult siblings or heirs warring with each other over family businesses when the founder is no longer on the scene. Jeff has represented all of the players in a business divorce; the companies, majority owners, and dissenting or oppressed minority owners. He has also prosecuted and defended derivative actions. Many of his business divorce matters have resulted in groundbreaking court rulings that are often cited by other courts and are the subject of articles and blogs by other lawyers. Jeff also frequently writes and speaks on these issues. Moreover, the scope of Jeff’s practice extends beyond intra-corporate disputes. With nearly 30 years of litigation experience, Jeff helps clients resolve virtually any kind of business conflict. He litigates all manner of real estate, contract, intellectual property, trade secrets, employment, fraud, and other business tort cases. Jeff represents large public entities, family businesses, and high net-worth individuals and celebrities such as AXA, Verizon, Oath (formerly AOL), ALP, Inc. (the company founded by artist Peter Max that owns and commercializes all of his art), Judith Regan, Perez Hilton, the Chetrit real estate family, the Lighthouse Group, Albert Einstein Medical School, Canon, and Ashkenazy Acquisition Corp. A master of procedure, Jeff is noted for devising innovative solutions that other lawyers often don’t think of, which is why clients turn to Jeff for their most significant business matters. Jeff regularly serves as lead counsel in trials and hearings in federal court, the commercial divisions of New York’s state courts, arbitral forums, and other venues around the nation, including in the Delaware Chancery Court. As Jonathan Etra, a Partner at Nelson Mullins describes him, “Jeff Eilender, is a litigation powerhouse unto himself.” Jeff has chaired the New York State Judiciary Committee for the Commercial and Federal Litigation Section of the New York State Bar Association. He also served on the Commercial Division (New York County) Advisory Committee, which advises the Bar Association’s Commercial Division on its practices. A frequent lecturer at the New York State Bar’s Commercial Litigation Academy and a panelist on commercial litigation issues, Jeff regularly edits and writes the firm’s New York Commercial Division Blog and has contributed to Bloomberg BNA’s 2017 Supplement to Litigating the Business Divorce.

Jason G. Eisenberg is an associate attorney at the Law Offices of Gary C. Eisenberg. Prior to joining his father Gary in his law practice in 2015, Jason attended Indiana University where he studied political science and business, graduating with honors. He then followed his father’s footsteps by attending Southwestern Law School in Los Angeles, where he received a full tuition scholarship and earned the highest grade in his class in civil procedure and privacy law. Jason practices in the areas of personal injury. He has second-chaired trials in Ventura County and Lancaster, obtaining successful verdicts in both. In addition, he has negotiated settlements is cases in which the other party disputed liability and initially refused to pay. In his free time, Jason enjoys playing golf and hockey, bicycling up and down the Pacific Coast, and reading books and articles about current events, politics, and foreign affairs.

Attorney Seth Elin, a Partner in the firm and Director of the Workers’ Compensation Department joined Altman Nussbaum Shunnarah in 2025. Prior to joining Altman Nussbaum Shunnarah Attorney Elin was a Partner at Keches Law Group for over twenty years specializing in Workers’ Compensation. Attorney Elin began his career at a prominent employment litigation law firm where he practiced in the field of employment and discrimination law. From 2007 to 2008, Attorney Elin was the Co-Chair of the Massachusetts Bar Association subcommittee on Worker’s Compensation, a member of the Massachusetts Academy of Trial Attorneys subcommittee on Worker’s Compensation and a member of the Employees Rights and Responsibilities Practice Group. He helped draft the Massachusetts Commission Against Discrimination’s Sexual Harassment in the Workplace Guidelines. From 2005 through 2008, Attorney Elin was named in Boston Magazine’s Super Lawyers edition as one of Massachusetts’ “Rising Stars.” Attorney Elin grew up in Brookline, Massachusetts and received his bachelor’s degree from Indiana University and both a law degree and Master’s degree in Public Administration from the University of Pittsburgh. While in law school, Attorney Elin was an Editor of the Journal of Law and Commerce, a quarter-finalist of the Wagner National Labor Law Moot Court Competition in New York City, and a quarter-finalist in the Craven National Constitutional Law Moot Court Competition in Chapel Hill, North Carolina. Attorney Elin was awarded the Faculty Award for Excellence in Legal Scholarship and was admitted into the prestigious Order of the Barristers. Attorney Elin has dedicated his 28-year legal career to protecting the rights of employees who have been hurt on the job, guiding thousands of clients through the complex Workers’ Compensation system with skill, compassion, and unwavering commitment. Known for his thorough understanding of the law and strategic approach to litigation, Attorney Elin has earned a reputation among clients, colleagues, and judges alike as a trusted advocate who gets results. Attorney Elin regularly handles claims involving workplace injuries, repetitive stress conditions, industrial accidents, and disputes over medical benefits and wage loss, and he has successfully represented clients at every level of the Massachusetts Department of Industrial Accidents. Attorney Elin believes in a hands-on, personalized approach to each case, and his clients benefit from both his deep legal experience and his commitment to clear, honest communication throughout the claims process.