Donald Fisher Miller Jr. of New Canaan, who was a vice president with Omega Engineering, died at his home after complications from a series of strokes, his great-niece, Margaret Miller Cole of Riverside, said. He was 87. Mr. Miller began his engineering career at DeLaval Separator and later went on to work at the Foxboro Company, Comac Engineering, Industrial Nucleonics, and finally Omega Engineering in Stamford until his retirement in 2002. Born, May 20, 1925, he was the son of the late Donald F. and Helene Tuttle Miller. At 18, he volunteered for the Army Air Corps as a fighter pilot and was discharged in 1946. He graduated from Amherst College in 1949 with degrees in physics and mathematics. After graduation, Mr. Miller and his friend Ambie Ambrose Hardwick bicycled in Europe for three months, after which Mr. Miller attended the University of Grenoble in France for a semester on the G.I. Bill. Prior to moving to New Canaan, he lived for 10 years in Wilton. In his spare time, Mr. Miller was an ardent sailor and skier and a volunteer at the Recovery Network of Programs in Bridgeport. His other interests included investing in the stock market, flying radio-controlled planes and flying. After his retirement he spent his time researching and trading stocks online. He is survived by his second cousins, Harriet Moore of Haywood, Calif.; Yolanda FitzGerald of Rowayton; and Aurelia Entwistle of Laguna Woods, Calif., and numerous other family members and devoted friends. Mr. Miller was pre-deceased by his second cousins, Philip Miller and Arthur Miller. A funeral service will be held on Friday, Aug. 30, at 1, at Hoyt Funeral Home, 199 Main Street, New Canaan. Burial will take place on Tuesday, Sept. 3, at 11, in the family plot at Rosedale Cemetery in Orange, N.J. The family will receive friends at the funeral home one hour before the service. Memorial contributions may be made to Connecticut Public Broadcasting, 1049 Asylum Avenue, Hartford, CT 06105. For online condolences and directions visit HoytFuneralHome.com.