Jean Harrington co-founded Maverick House, a non-fiction publishing company, in 2002, where she remained as managing director until 2011. During that time she also set up an office in Bangkok and started selling and distributing books all around southeast Asia, as well as ghost-writing several books. Her first ghost-written project, Survivor: Memoirs of a Prostitute, sold over 20,000 copies. She also ghost-wrote The Irish Ballerina with Monica Loughman. She joined the board of Publishing Ireland and subsequently became its president. She was elected as the Irish representative to the Federation of European Publishers in 2010, where she remained until 2012 when she left publishing and started working in education.