Doug Wolff Doug Wolff is owner and president of Boulder CADD Services, Inc., of Broomfield, Colorado. He is the author of McGraw-Hill's Drafting Symbol Sourcebook, published in November, 1998. A veteran of 25 years in drafting and design, he is on the advisry council of the Colorado chapter of the Vocational Industrial Clubs of America, and has served with the American Arbitration Association. Read More Read Less