Local Knowledge. Global Resources.

E & E's diverse family of subsidiary companies works together to offer a broad range of environmental services to our clients. Local knowledge and established relationships are complemented by our ability to seamlessly pull resources from across a global network to provide clients with the expertise they need, when and where they need it.







Gustavson Associates is a petroleum, natural gas, and mining consulting firm founded in 1979 with offices in Boulder and Lakewood, Colorado.  Gustavson’s geologists, geophysicists, engineers, economists, financial experts, appraisers, and land and contracts managers solve problems involving all aspects of natural resource evaluations. In the complex world of natural resources, Gustavson has provided insightful advice in support of strategic decisions in more than 40 countries.


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Headquartered in Rio de Janeiro, Ecology and Environment do Brasil, Ltda. (Ecology Brasil) has extensive experience performing EIAs for oil and gas facilities and other energy projects and provides licensing support, diagnostic and strategic environmental evaluations, risk analyses, biological monitoring, environmental viability and socioeconomic studies, and environmental project management. The company’s mission is to combine innovative and cost-effective environmental solutions that meet clients’ economic objectives while fostering ecologically sustainable, socially fair, and economically feasible development in Brazil and Latin America.


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Gestion Ambiental Consultores, S.A. (GAC) is an environmental consulting headquarteredtered in Santiago, Chile. GAC provides specialized consulting in energy, infrastructure, mining, and forestry. With specialists in civil, industrial, and environmental engineering, chemistry, forestry, biology, and anthropology and external consultants in acoustic pollution, urbanism, archeology, social, economic, and legal issues, GAC is able to offer clients integrated environmental services to help them achieve their goals.


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Walsh Peru is a full-service environmental consulting firm that, since its founding in 1994, has become one of the leading companies in the environmental consulting field in Peru.  Walsh Peru specializes in providing consulting services for the oil and gas, mining, and power generation industries and is registered with the Peruvian Ministry of Energy and Mines to perform EIAs.  The company has performed environmental work approved by the Interamerican Development Bank (IDB) and is familiar with International Finance Corporation (IFC)/World Bank requirements for investment and infrastructure projects.


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Headquartered in Quito, Walsh-Ecuador was established in 1995 and has a diverse, interdisciplinary staff of professionals covering a wide range of technical disciplines. The firm is accredited by the Ecuador Ministry of Energy and Mines as a Grade A consultant for mining and petroleum related environmental work. Walsh Ecuador has worked on permitting and other tasks for petroleum projects in Ecuador, the Middle East, and Africa. For the mining industry, Walsh Ecuador performs environmental and ecological investigations, geological surveys, biological and socioeconomic assessments, archaeological/cultural resource surveys, and stakeholder consultation.


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