Current Owner and President Jasper Calcara joined Don in 1998, where the pair of them worked out of a small office behind Don’s house in rural Santa Rosa. The business began to expand rapidly over the following years with the addition of senior engineers Robin Ko and Luke Griffis. In 2002 Jasper opened their Southern California office, and focused on expansion of their services nationally. Don’s passion and knowledge of the construction industry helped DHC become one of the largest and most highly respected temporary works design firms in the country.
As Don was leaning towards a partial retirement to enjoy the success of his hard work, he was tragically killed in a vehicle accident in 2006. It was a devastating loss to his family, friends and many colleagues throughout the industry. Although he is greatly missed, the employees at D.H. Charles Engineering, Inc. are proud to honor the tradition and philosophy Don established in the companies earliest years, of providing immediate response, inventive design, and quality work.