Maxwell was an editor for Pergamon Press Publishers, in the early 1970s. According to Tatler, Maxwell spent most of the 1970s and 1980s working for her father, which included running the West Coast office of Pergamon Press and involvement in one of his software acquisitions. From September 1974 to June 1976, Maxwell worked as a middle-school teacher at Shepherd's Hill Middle School in Blackbird Leys, Oxford. In the late 1970s, she became a school editor for A. Wheaton & Company in Exeter, England. Maxwell is the author of The Pergamon Dictionary of Perfect Spelling, first published by Pergamon Press Ltd. in 1977. The book became an international bestseller, proving valuable for dyslexic learners. Maxwell rewrote and updated the book in 2005. Her book has been republished several times: in 2005 under the title Dictionary of Perfect Spelling by Barrington Stoke Publishers, in 2007 under the title Spell it Right by Berlitz, and most recently as the School Spelling Dictionary in 2012 by Barrington Stoke.
Information technology
Maxwell became a resident of the San Francisco Bay Area in 1979. In 1982 Maxwell acquired Information on Demand, one of the earliest information brokers, which was later renamed Research on Demand. Maxwell is the creator and co-founder of Magellan, one of the first professionally curated online search/reference guides to Internet content. In 1992, she created and co-authored one of the first hard-copy reference guides to the Internet: New Riders Official Internet Yellow Pages and The McKinley Internet Yellow Pages; both published by Macmillan Publishers in 1994 and 1995 respectively. After Magellan was acquired by competing search engine Excite, in 1996, she went on to co-found Chiliad: a software company involved in the advance of on-demand, massively scalable, intelligent mining of structured and unstructured data through the use of natural language search technologies. The firm's software was behind the data search technology used by the FBI's counterterrorism data warehouse. As of August 2019, Maxwell served as the board director of Chiliad, Inc.. She is the Program Manager of Learning Technologies at The University of Texas at Dallas where she is also involved in Special Projects for Information Resources. Maxwell is a former Trustee of the Internet Society and The Santa Fe Institute. She serves on the boards of the International Center for Disability Resources on the Internet and Leonardo/OLATS. In 2011, she was appointed an IPv6 Fellow of the Internet Protocol version 6 Forum in recognition of her contributions to support the promotion, deployment, and technology advantages of version 6 around the world.
Other activities
Maxwell was appointed director of The Environment4Change Foundation, a London-based environmental consulting organization, in June 2019.
Personal life
In June 1986, she married physicist and educator Roger Malina of Berkeley, California. Maxwell and Malina have three children, sons Xavier and Yuri and daughter Giselle. Maxwell has a second residence in France in Meyreuil, a village near Aix-en-Provence.