Norman Broadbent plc directorate changes
She will continue to work for the company until the end of August 2015.
Scanes Bentley, currently non-executive chairman of the company, has been appointed executive chairman with immediate effect.
Bentley said, "The directors of the company and all the staff at Norman Broadbent would like to thank Sue O'Brien for her contribution to the business over the years and wish her well for the future. I know that she remains incredibly proud to have been part of growing the Norman Broadbent brand and reputation."