Antoinette R. Stone, a founding partner in the firm of Brown Stone Nimeroff, died Jan. 30. She had served the Philadelphia community as an attorney for 36 years.

“She will be sorely missed by both the bar and by us,” Brown Stone partner Mary Kay Brown said. “She served as a role model for many young associates.”

Stone, who received her J.D. from Temple University Law School, served as an enforcement attorney for the Environmental Protection Agency and as an assistant U.S. attorney for the Eastern District of Pennsylvania before she entered private practice, according to Brown Stone’s website. While working for the EPA, she served as a prosecutor in the first criminal case enforcing the Clean Water Act that resulted in the incarceration of a corporate officer.

As an attorney with Brown Stone, which Stone founded with Brown and Jami Nimeroff in 2007, she worked with several Fortune 50 clients in cases and settlements involving environmental issues. She also successfully represented former Pennsylvania Gov. Edward G. Rendell and former U.S. Sens. Arlen Specter and Rick Santorum in a litigation case against the secretary of defense, according to the firm’s website.

“She was an incredible lawyer, and she gave a lot to us,” Brown said.

“She was a confident lady,” said Peter Vaira of Vaira & Riley, a former U.S. attorney who hired Stone when she was a young attorney. “She was very successful. She didn’t rely upon any organization to help her, and she did it by herself in a man’s world.”

Stone is survived by her son, Matthew, her daughter, Lily, her sisters, Roslyn and Stephenie, her nieces, Renée and Lauren, and her nephew, Derek.

A memorial service is scheduled from 2 to 4 p.m. Sunday at the Academy of Music, 240 S. Broad St., Philadelphia. Donations can be made to Planned Parenthood of Philadelphia.

Dan McCormick can be contacted at 215-557-2440 or dmccormick@alm.com.