About McGill is an industrial-scale compost manufacturer that owns and operates advanced, high-rate composting plants in the U.S. and Ireland. It also operates all types of indoor and outdoor composting facilities under contract for public and private owners. Founded in 1991, the company specializes in designing and operating large, indoor plants recycling a wide range of compostables (including bio-plastics) and offers a full line of premium compost products. McGill also licenses its designs and technologies to other owner-operators.