Horner & Shifrin’s commitment to excellence means that we are continually seeking out new and innovative ways to better serve our clients, our communities, and our employee-owners. Acquisitions are a key component of our strategic plan, as they can help us to expand our geographic reach, diversify our service offerings, increase the size of our expert team, and provide growth opportunities for both new and existing staff.


Clarida & Ziegler Engineering Co.

Established by Glenn Clarida in 1965, Clarida & Ziegler Engineering Co. is a civil engineering firm based in Marion, Illinois. CZ provides engineering services for municipalities, water districts, and commercial and residential developers in Southern Illinois.

Horner & Shifrin began the process of acquiring Clarida & Ziegler Engineering Co. in 2023.


Innovation. Agility.
Reliability. Horner & Shifrin.