Janet Weinberg, an advocate for people with disabilities who found her calling as a top executive and fund-raiser at social service organizations like the Gay Men’s Health Crisis, died on Sept. 1 in the Bronx. She was 63.

Her spouse, Rosalyn H. Richter, an associate justice of the Appellate Division of the New York State Supreme Court, said the cause was a chronic heart condition.

Ms. Weinberg had been an occupational therapist for a decade when she accepted an offer to join the board of the Lesbian & Gay Community Services Center in Manhattan in the mid-1990s. It was a career transition she had been preparing for after building a reputation as a politically savvy activist for people with disabilities and hoping one day to help a population still affected by the AIDS epidemic.

She had never forgotten an incident in 1985, when she was working as an occupational therapist at a nursing home in Rockaway Beach, Queens, and the community erupted in protest against a city proposal to transfer dying AIDS patients there from hospitals.