I have 20 years of experience, and specialize in the field of construction estimating with specific knowledge in the areas of civil and sitework construction, earthwork grading and asphalt paving. I have published on such topics as sanitary sewer construction. I have testified on retaining wall costs, asphalt paving quality and zoning code enforcement. I am a certified professional estimator member of the American Society of Professional Estimators and have served on their Board of Trustees.