Lawrence Mehlenbacher

ARB, Inc. provides construction services to power and wastewater treatment plants. It also provides engineering, construction, fabrication, maintenance and replacement services to the energy, petrochemical, refining and mining companies, as well as to developers, utilities, and public agencies worldwide. The company was founded in 1946 and is headquartered in Lake Forest, CA.

The Pipeline Contractors Association is a trade association located in the United States, specifically in Virginia. The association represents companies in the oil and gas pipeline construction industry. The PLCA provides legal and advocacy services to its members, with a focus on safety, quality, efficiency, training, environmental compliance, and community support. The association has a storied history, with representatives from 17 construction firms holding meetings in the late 1940s to anticipate the need for a safe underground system of transportation for natural gas, petroleum, and petroleum products.