Milestone Environmental Services

Milestone Environmental Services, headquartered in Houston, Texas, is a leading environmental services and carbon management company and the largest independent energy waste sequestration company in the United States. Milestone operates a leading integrated network of waste infrastructure that reduces the carbon impact of its customers by permanently sequestering hydrocarbon waste over a mile below the surface, preventing greenhouse gas emissions and water and ground contamination. Since 2014, Milestone has sequestered more than 2 million tons of CO₂e through its injection process. Its subsidiary, Milestone Carbon, is devoted to helping multiple types of emitters meet their decarbonization goals by developing and operating injection sites that permanently and securely sequester CO₂ below the surface.

SK Capital acquired a majority interest in Milestone in October 2023.