Carnahan Promoted to Engineering Manager For Lemar Industries

MILFORD, IN — Alex Carnahan has been promoted to Engineering Manager for LeMar Industries, a subsidiary of Brock Grain Systems, according to Nicholas Kiederlen, Plant Manager for the CTB, Inc. business unit. In his new position, Carnahan will be responsible leading the engineering team in designing towers, catwalks, and other grain structures for large, complex grain storage systems.

Carnahan had been named Senior Structures Engineer for LeMar Industries in July 2021. Prior to his employment with CTB, Carnahan worked 13 years as a Senior Structural Engineer for a national engineering and design company, where he led numerous large projects from design through completion. He graduated from the University of Illinois in Urbana, Illinois, earning a bachelor’s degree in civil engineering with a focus on structures.

A native of Sherrard, Illinois, Carnahan currently resides in Altoona, Iowa.


LeMar Industries is a subsidiary of Brock Grain Systems, a division of CTB, Inc. – a Berkshire Hathaway Company. LeMar complements Brock’s line of grain storage, handling, drying and conditioning, and structural systems by providing Leadership Through Innovation® with towers and catwalks for grain bins. LeMar also offers temporary grain storage solutions and specialty fabrication services for the agricultural and aggregate industries.


CTB, Inc. (, a Berkshire Hathaway subsidiary, is a leading global designer, manufacturer and marketer of solutions developed with the goal of equipping its rcustomers to join it in Helping to Feed a Hungry World®. CTB's customers use its products for preserving grain; for raising pigs and poultry to harvest meat and eggs; and for processing poultry, fish and other foods. CTB deploys its financial strength to grow via a product-driven focus, strategic acquisitions, an expanded global physical presence and best-cost manufacturing. The company is headquartered in Milford, Indiana, U.S.A., and employs 3,000 people worldwide.

LeMar Industries, 2070 NE 60th Ave., Des Moines, Iowa, 50313; Telephone: 515-266-7264; Fax: 515-266-0274; E-mail:;