This document discusses principles of professional ethics for civil engineers, including honesty, integrity, respect, cooperation, and caring. Honesty involves speaking the truth and not lying. Integrity means unity of thought, word and deed, which allows a person to make consistent decisions and achieve excellence. Respect involves recognizing others as human beings and respecting different ideas. Cooperation is important at various levels in industry and business. Caring means displaying kindness and concern for others through social and community involvement.