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4800 E 57th Street, Suite B
Sioux Falls, SD 57110



Since 1938, KLJ has provided engineering-based services with local expertise to drive national, large-scale projects, and deliver successful results.

Our strong regional connections, responsive personal service, and industry experience create strategic advantages for all clients.

As an employee-owned firm, we invest in our future through a commitment to creating sustainable environments. Through innovation and hard work, we develop lasting infrastructure that responds to the social, civic, and economic needs of our communities. Clients achieve success from our ability to envision, plan, engineer, and build infrastructure.

Business Hours:
Monday - Friday: 8am - 5pm