[1] Later in life, she moved to the Greek island of Skiathos with her husband, actor Richard Romanus, where they resided until their passing.

Following her long period of costume design work, Sylbert took on executive production management roles at the vice president level, first at Warner Borothers, then at United Artists, where she was known, in particular, for her skills at conflict resolution when filmmakers were at odds with the studios.[when?

[4][page needed] Sylbert was affectionately known in that close-working, small group of accomplished filmmakers as Ant for her penchant for "stringently straight" dark skirts and black turtlenecks.

[2] In addition to the 1975 and 1978 Academy Award nominations for best costume design,[5][6] Sylbert won an Emmy for her production of Truman (1995).

[1] In 1999, Sylbert and Richard Romanus were nominated for Best Original Screenplay by the Writers Guild of America for the Christmas film If You Believe.