Fitzpatrick started with Concorde Services in February 2002 before Congrex bought it in 2006. She then became managing director of Congrex UK in 2008.
Fitzpatrick's new role as director of Association Management and Consulting Product Practice will focus on growing MCI's existing client base and winning new accounts to expand its portfolio of association clients, as well as mentoring the team of event management professionals at MCI Petersfield.
Fitzpatrick said: "I am excited to have joined such a forward-thinking and dynamic organisation. I look forward to developing the Association Management and Consulting Product Practice and seeking new opportunities."
The Congrex management team in the UK, headed by Susan Hayden, is currently being supported by group resources including Rob Harrison, chief operating officer, and Business Development Director Caroline MacKenzie.