Provides national and regional leadership and direction in the coordination and development of environmental policy and program evaluation.
Provides for a coordinated and unified approach and response to environmental issues that affect multiple bureaus in order to ensure that the Department of the Interior speaks as one entity with respect to those issues.
Provides guidance for the Department's compliance with the full range of existing environmental statutes, executive orders, regulations and other requirements.
Provides independent environmental and technical advice to the Secretary, Deputy Secretary, the Assistant Secretary - Policy, Management and Budget and other senior Departmental officials.
Acts as an advocate, both inside and outside of the Department, for programs which enable bureaus to accomplish their missions in an efficient and effective manner.

These missions are met nationwide through the OEPC headquarters and Regional Offices. The Office provides the only technologically-based staff in the Office of the Secretary that advises the Secretary, the Assistant Secretary - Policy, Management and Budget, and other top Departmental officials about policies, programs and individual actions affecting natural resources and environmental quality.

The headquarters office is organized into three teams -- Natural Resources Management Team, Solid and Hazardous Materials Management Team (SHAZMAT), and Natural Resources Trust and Response Team.

OEPC has eight regional offices located in Boston, Philadelphia, Atlanta, Denver, Albququerque, Oakland, Portland, and Anchorage. Each Regional Office is headed by a Regional Environmental Officer who reports to the Director, and is responsible for all environmental functions within its region. They serve as a Departmental coordinator and an independent source of information and analysis to the Office of the Secretary.