Lord helped found the
Long Wharf Theatre in New Haven in 1964. She became deeply involved with the theater's founding after
William Sloane Coffin introduce her to other Yale graduates who were interested in starting a local theater (Harlan Kleiman,
Jon Jory, Newt Schenck, and Betty Kubler). Lord served as president of the board of the Long Wharf Theatre from 1964 to 1990. She began working at
Yale New Haven Hospital in 1970. She later became a research associate at the
Yale Child Study Center, where she focused on child custody issues. At Yale, she performed a variety of roles, including co-leading support groups for parents of severely ill children. She also wrote papers on various topics, including a teenage girl's right to refuse dialysis and the effect on patients when their psychoanalysts die. She collaborated with Yale psychiatry professor
Albert J. Solnit and Barbara Nordhaus to author a book on foster child placement issues, which was published by Yale University Press in 1992. Lord wrote a well-received biography of her father that was published in 1999, when she was 77. Reviewers praised her blend of "tart wit, honest introspection and filial concern" and called it "a delightful as well as thoroughly well documented book." At the time of her death, she was working on a biography of her mother. == Winterthur estate ==