Environmental Resources Management (ERM) manages, maintains, and meters the resources of Mother Earth. The environmental consulting firm offers site development and remediation services, as well as technical services, for water and wastewater management, air quality assessment, and pollution control. With 160 offices in more than 40 countries, ERM also provides facility operations and merger consulting services, including strategic advice, impact studies, contaminated sites management, and permitting assistance. Clients include Arconic, Bayer, Del Monte, and Mattel. ERM was sold to Charterhouse Capital Partners in 2011 as part of a management buyout.