A senior licensed professional engineer was hired by a municipality to be an expert witness...

A senior licensed professional engineer was hired by a municipality to be an expert witness in a lawsuit brought by the municipality against a local engineering Arm for flaws in their structural design of the newly opened city hall. During the course of Investigating the facts, the senior engineer discovers a serious structural design flaw that could be dangerous to the public if corrective action is not token immediately. The two parties decide to settle out of court, and as port of the settlement, the parties enter into a confidentiality agreement and the engineering firm rectifies oil structural flows to the municipality's satisfaction. The municipality that hired the senior engineer requests that the senior engineer keep aII facts learned during the investigation confidential.

TO whom does the engineer owe a duty and what. If any, action should the engineer take?