A consultant engineer hired by the regulatory body to carry out these tasks clearly in the "public officials or civil servants" category. You can find perfect engineering firm via https://www.palladium-pdd.com/engineering-services/.
In the engineering profession, it is usual for a city agent or management agency to contract with a consulting firm to carry out various engineering tasks including, but not limited to: a review of private development plans, public improvement designs, general consultations and infrastructure designs.
In the past, it had become commonplace for consulting firms to refuse private sector employment if it was located in a jurisdiction where they were representative consultant engineers. This is caused by conflicts of interest understood in completing private sector work in jurisdictions where you are responsible for providing advice to the city government and / or for peer review.
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This is largely a problem in rural areas or small towns where these practices are not heeded and / or local officials do not know how to handle them properly. This results in unfair profits for municipal consulting firms that submit competitive bids for private sector work.
When a situation arises like an example given above and there is a potential conflict of interest, engineers have the duty and responsibility to notify all parties in advance. This will help to ensure there is a backup system in place, to fully disclose the conflict and to get approval from the affected individual or entity.