Engineered Transportation International Announces New President of Kalyn Siebert

Athens, TN. – (March 4, 2022) – Engineered Transportation International has appointed Matt Krock as President of Kalyn Siebert, a premium heavy-haul trailer manufacturer. In his new role, Krock will be responsible for all Kalyn Siebert business.

“With his more than 18 years of commercial and manufacturing expertise and industry know- how, we are confident Matt will successfully lead Kalyn Siebert, helping to grow our brand and serving our dealers and customers,” said Ryan Rockafellow, CEO, Engineered Transportation International.

Krock has been with Engineered Transportation International (EnTrans) in the Heil Trailer International division for eight years, first serving as a Regional Sales Manager and subsequently as the Director of Business Development.
Prior to joining EnTrans in 2014, Krock worked for Mauser as a Plant Engineer and then for Navistar as a Technical Sales Manager before being promoted to the Procurement Supply Chain Manager. He holds a Bachelor of Science degree in Mechanical Engineering from the University of Illinois as well as an MBA from Northern Illinois University.
“I’m looking forward to expanding my role at Kalyn Siebert,” said Krock. “Together with the team, we’ll continue to build on the brand’s reputation for providing premium, custom- engineered heavy-haul trailers for industries with specialized transportation requirements.”

About Engineered Transportation International
Engineered Transportation International (EnTrans) is a global leader and manufacturer of transportation equipment, providing innovative engineered solutions to meet customer challenges. The company is comprised of Heil Trailer, Polar Service Centers, Polar Tank Trailer, Jarco and Kalyn Siebert. Heil Trailer has been manufacturing durable tank trailers since 1901 for liquid, dry bulk, oilfield, construction, platform, specialized, towing and defense transportation. Polar Tank Trailer is one of North America’s largest producers of dry and liquid bulk tank trailers. Engineered Transportation International is owned by American Industrial Partners and headquartered in Athens, TN.

About Kalyn Siebert
Kalyn Siebert is a subsidiary of Engineered Transportation International, a leading manufacturer of tank trailers, oilfield capital equipment and related components used in the oil & gas industry. Kalyn Siebert engineers and manufactures its line of specialized trailers in Gatesville, TX, exceeding the toughest standards in the industry by delivering maximum strength at low tare weights, low maintenance costs, long service life and the highest possible return on investment. Customers requiring proven, heavy-duty solutions in the Transportation, Construction, Oil/Gas and Military/Defense markets rely on the Kalyn Siebert Advantage to protect their payloads and investments. Kalyn Siebert heavy-haul trailers–Engineered to Perform. Built to Last. To learn more, visit

Matt Krock, Kalyn Siebert President