Thursday, October 1, 2026
After more than a year of planning, one of Nassau County’s best-known property tax law firms has officially entered a new era.
Maidenbaum & Sternberg LLP has been renamed Maidenbaum & Madmon LLP, recognizing Managing Partner Amy Madmon’s leadership while reaffirming the firm’s commitment to the clients it has served for decades.
The change became official this month after paperwork was filed with New York state. Firm leaders emphasized that while the name is changing, the attorneys, staff and client-focused approach remain the same.
“It’s exciting and nerve-racking at the same time,” Madmon said. “...We’re excited to officially move forward, but we also want our clients to know that their team is still their team.”
Madmon joined the firm in 2006, after spending two summers as a legal intern. She became managing partner six years ago, and oversees day-to-day operations for a staff of nearly 60 employees while helping guide tens of thousands of Nassau County homeowners through the property tax grievance process each year.
Madmon has spearheaded major technological improvements, including electronic client enrollment, online client portals and modernized internal operations. She also developed a streamlined transition program for homebuyers and sellers that helps ensure that property tax savings are properly allocated during real estate transactions.
The firm’s founder, Shalom Maidenbaum, said the name change simply reflects the leadership role Madmon has already been fulfilling. “She’s been responsible for the transition, the growth, our entry into the digital age and even the A.I. age,” Maidenbaum said. “Now it’s time to put her name on the banner.”
He stressed that the firm wants existing clients to feel reassured that the transition will be seamless. “Amy has already been running operations for the past several years,” Maidenbaum said. “We want our clients to know that nothing is changing in terms of the quality of representation they receive.”
Much of the planning over the past year focused on ensuring that clients would understand that the firm’s attorneys and staff remain in place. As part of the transition, longtime Partner Ilyse Gellar Sternberg will remain actively involved with clients, particularly those in the firm’s commercial tax practice, while gradually transitioning internal leadership responsibilities.
“We wanted to make very clear that she’s still part of the firm,” Maidenbaum said of Gellar Sternberg. “She’s still working with clients every day.”
The firm, which has earned a reputation as a leader in Nassau County property tax reduction, has also been at the forefront of taxpayer advocacy through several significant legal victories protecting homeowners’ rights to challenge property tax assessments.
“Our goal is continuing to elevate the status quo,” Madmon said. “Our clients come first, and they should feel comfortable knowing the same attorneys, the same staff and the same commitment to service are here.”
For Maidenbaum, adding Madmon’s name to the firm’s masthead recognizes not only her two decades of dedication but also the future of the business.
“I sleep well at night knowing Amy is at the helm,” he said. “She is a consummate professional who will continue our tradition of aggressively representing taxpayers while maintaining the personal touch our clients have always expected.”
