The American Council of Engineering Companies of Missouri, Inc., ACEC/MO, is an organization of professional engineering firms in private practice. ACEC/MO, is a founding member organization of American Council of Engineering Companies (ACEC). For more information on members firms across the nation, contact ACEC. ACEC/MO promotes professional qualifications-based selection for design services. ACEC/MO provides educational, professional, and insurance programs for its members and their employees. Click here for more information.