Being an additional insured on someone else’s insurance policy does not guaranty protection. Such was the lesson learned by an engineering firm in Orchard Hiltz & McCliment Inc. v Phoenix Ins. Co. and Federated Mutual Ins. Co., (U.S. 6th Circuit Court of Appeals, Jan. 2017).

In Orchard Hiltz, the Village of Dexter hired the design firm, Orchard Hiltz & McCliment (OHM), to oversee upgrades to Dexter’s wastewater treatment plan. While contractors were removing a lid on a digester tank, sparks from a torch ignited methane gas causing an explosion. One worker was killed and another was injured. The injured worker and the family of the deceased worker sued OHM in state court, claiming that OHM breached the standard of care by failing to ensure that the contractors followed the plans and specifications and by failing to ensure that the contractors implemented safety measures. OHM’s professional liability insurance carrier, XL Specialty Ins., provided a defense to OHM in that state court case.