CNG Engineering, PLLC (CNG) is a professional Mechanical, Electrical, and Plumbing engineering design and planning firm based in San Antonio, Texas. Since 2004, CNG has provided superior designs that are clear, concise, and complete to exceed the client and end users’ expectations. Our commitment to paying Attention to Detail has enabled CNG to build a solid reputation as an MEP design firm with demonstrated proficiency in the design and planning of aviation, municipal, higher education, health care, and commercial office facilities.