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A cost engineer is an engineer whose judgment and experience are utilized in the application of scientific principles and techniques to problems of estimation; cost control; business planning and management science; profitability analysis; project management; and planning and scheduling.. Contents.ost engineering is a field of engineering practice that began in the 1950s (AACE International was founded in 1956). The skills and knowledge areas of Cost Engineers are similar to those of Quantity Surveyors.
1 County/engineer fees for a typical perc test might cost $150-$500 while use of a backhoe can add $300-$450 or more, for an average total of $450-$950 for a complete perc test. 2  For example, Guthrie County in Iowa charges $175-$225 in perc test fees, and Caroline County Health Department in Maryland charges $270-$300.