The American Council of Engineering Companies (ACEC) is a national organization representing thousands of private engineering companies across the United States. It serves as a voice for the engineering industry, advocating for policies that support the growth and sustainability of engineering firms. ACEC provides a range of services to its members, including professional development, networking opportunities, and business resources.

In terms of sustainability, ACEC is committed to promoting environmentally responsible engineering practices. The organization encourages its members to adopt sustainable design principles and to integrate green technologies into their projects. While specific sustainability certifications or accreditations for ACEC itself are not detailed, the council actively supports initiatives that aim to reduce the environmental impact of engineering projects. Members are often involved in projects that focus on energy efficiency, renewable energy, and sustainable infrastructure development.