In 1997 the Herolds took over DELO Industrial Adhesives in a management buy-out. At that time, Dr. Wolf-Dietrich Herold had been director of DELO for years. Sabine Herold joined DELO in 1989 after getting her degree in chemical engineering. Before being promoted to management she led the Engineering, Marketing and Sales departments. Since the beginning of 2017, Robert Saller has been strengthening the management.