Contact Us


5220 Oakland Avenue
St. Louis, MO 63110

Telephone: 314.863.5570

Collinsville, IL

1099 Beltline Rd, Suite H
Collinsville, IL 62234

Telephone: 618.551.0050

307 E. Washington Avenue
Effingham, IL 62401

Telephone: 217.342.2025

120 Commerce Drive, Suite 100
Holts Summit, MO 65043

Telephone: 573.415.6114

9400 Bunsen Parkway, Suite 150
Louisville, KY 40220

Telephone: 502.671.0060

Your Engineering Partner…

Delivering the highest quality of design, CDI’s strength as an engineering partner lies in our supportive and responsive team, innovative problem solving, and our commitment to positively impacting our communities.