53 Pa. Stat. § 53209
It is unlawful for any architect or engineer in the employ of any incorporated town and engaged in the preparation of plans, specifications or estimates to bid on any public work at any letting of such work in this Commonwealth.
It is unlawful for the officers of any incorporated town charged with the duty of letting any public work to award a contract to any such architect or engineer in the employ of the Commonwealth or of any county, city, borough, incorporated town, township, or other political subdivision of the Commonwealth.
It is unlawful for any architect or engineer in the employ of the Commonwealth or of any county, city, borough, incorporated town, township, or other political subdivision of the Commonwealth to be in anywise interested in any contract for public work for the incorporated town or receive any remuneration or gratuity from any person interested in such contract.
Any person violating any of the provisions of this section shall forfeit his office and shall be guilty of a misdemeanor, and, on conviction thereof, shall be sentenced to pay a fine not exceeding five hundred dollars or to undergo imprisonment for not more than six months, or both.
53 P.S. § 53209