D.E Pilling & Assoc. Ltd. Consulting Engineers have been providing Professional Engineering services to Kelowna and the Central Okanagan since 1983. Our commercial, municipal and residential clients choose us for our professional reputation and broad range of skills and experience. Our services include engineering calculations for servicing requirements, complete design, layout, inspection, and certification of on-site and off-site civil works, environmental impact studies, engineering for water utilities, and subdivision design