Wielgus joined the Accor Group in 1998 as a field Human Resources Manager at Motel 6. In 1999, he transferred to New York with the Accor Business and Leisure division, where he became Corporate Director of Human Resources and was later promoted to Vice President of Human Resources, most recently serving as Senior Vice President of Human Resources and Training for Accor North America.
Before joining the Accor Group, Wielgus held human resources, training and operational positions at Sportservice for the Chicago White Sox, Delray Farms and Auchan Hypermarkets. Wielgus is a member of the Society of Human Resources Managers.