The firm dates to 1972 when the private practice of C. J. Dulohery, Jr., P.E. Consulting Engineer was established. Two years later, James E. Weeks, Jr., P.E. joined the practice to form Dulohery & Weeks Consulting Engineers. In 1978, Carl Gagliano joined the firm and the official name became Dulohery, Weeks & Gagliano, Inc. The firm operated as Dulohery, Weeks & Gagliano, Inc. until 2008 when the name was shortened to Dulohery Weeks.