The National Association of State Energy Officials (NASEO) is a membership network of senior officials from the State and Territory Energy Offices, as well as affiliates from the private and public sectors. Member state agencies work on a wide range of energy programs and policies, including:

• Energy efficiency in homes, commercial/public buildings, industry and agriculture;
• Renewable energy, such as solar, wind, geothermal and biomass;
• Residential, commercial and institutional energy building codes;
• Transportation and heating fuel supplies, pricing and distribution;
• Oil, natural gas, electricity and other forms of energy production and distribution;
• Energy-environment integration (such as using conservation to reduce air emissions);
• New and emerging high efficiency transportation fuels and technologies; and
• Energy security and emergency preparedness, and many other energy matters.