Wilson, who spent more than 20 years working for the company, has retired from his post as vice president for finance EMEA.
BCD M&I expects to appoint a replacement by September, said vice president marketing and communications Matthew Wall.
"Ian has been with the company for more than 20 years and is incredibly knowledgeable about all aspects of the business," added Wall. "When you are recruiting at this senior level it takes a bit longer."
Until Wilson’s replacement is appointed, Chicago-based chief financial officer Diana Caray will oversee the role.
Caray is expected to spend more time at the UK office in Maidenhead, Berkshire, as a result. Wilson retired on 31 May.