NNEC makes available to the oil and gas industry, worldwide experience and reputation in Engineering and Project Support Services. Specifically, for Engineering - Conceptual Design, Front End Engineering, Detail Design of Oil and Gas related facilities, and Production of âAs-Builtâ CADD Drawings of Oil and Gas facilities. QA/QC Services, Specialist in Technical Manpower Services. Plant/Pipeline Integrity Inspection & Maintenance, Project Management, and Environmental Protection Services.