(October 25, 2017, 2:13 PM EDT) -- SAN FRANCISCO — A California federal magistrate on Oct. 24 rejected an insurer’s reliance on an "architects and engineers professional services exclusion" to bar directors and officers liability coverage for an underlying lawsuit brought against its environmental engineering company insured, finding that the insurer has a duty to defend (RMC Water and Environment v. Travelers Casualty and Surety Company of America, No. 17-00379, N.D. Calif., 2017 U.S. Dist. LEXIS 176107)....