Join Our Team. GREDELL Engineering Resources, Inc. is a civil/environmental/geotechnical engineering firm based in Jefferson City, Missouri. Branch offices are located in Springfield, MO, and the Kansas City metropolitan area (current office in Lenexa, KS). Gredell Engineering is in its 22nd year of operation and continues to expand its clientele and services. We are licensed to provide engineering services in MO, KS, IL, and IA. Submit your resu...