A Cathodic Protection (CP) Engineer designs, implements, and maintains systems to prevent corrosion in buried or submerged metal structures like pipelines and tanks. Key responsibilities include performing surveys, determining sacrificial anode and impressed current system needs, managing construction and commissioning, supervising technicians, ensuring regulatory compliance, and creating detailed documentation for clients. The role requires knowledge of corrosion principles, electrochemistry, industry standards, and certifications such as NACE/AMPP.