About Us


For nearly 40 years our team has been designing and manufacturing industry leading equipment in Columbia, TN. Our primary focus has always been serving our customers in the pugmill industry. In 2022 we built a new, larger production facility. This growth allowed us to further meet our customer’s needs by expanding into the ready mix concrete industry. We look forward to learning about your needs and serving you in the future.


Duane Allen
President, Partner
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Duane has extensive experience with steel fabrication, custom design, and manufacturing. He grew up working in the family steel fabrication business. After college he worked for Monsanto Chemical, and started his own steel fabrication business in 1982. Duane graduated from Tennessee Tech with a degree in mechanical engineering.
Jared Allen


Jared Allen
Vice-President, Partner
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Jared joined Duane at Pugmill Systems in 2007 and has served in many roles through the years. He currently acts as general manager and has a hand in all facets of the business. Before coming to Pugmill Systems, Jared graduated from Lipscomb University with a degree in Marketing/Management and worked as a neighborhood manager for a large, regional home builder. 
Cody Phillips
Lead Draftsman/Designer
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Cody graduated from NWSCC with an AAS in Design Engineering and has over 10 years of experience in machine design, military hardware design, material/particulate handling, industrial safety, and conveyor systems. Cody has served in multiple roles throughout his career. From a drafting associate at a small startup company, to managing a team of mechanical engineers on large Department of Defense projects.
Carolyn Anderson
Office Manager
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As a former office and accounting manager for a rock quarry and construction company, Carolyn understands end users’ requirements and tailors Pugmill Systems customer service levels to meet those needs.
Derek Marks

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Derek graduated from NWSCC with an AAS in Design Engineering and then earned a Bachelor’s in Mechanical Engineering from UAH. With over 10 years of combined experience in the design and engineering fields, Derek has a broad background including electrical power production, Department of Defense projects, agricultural/heavy machinery component manufacturing, the gas and oil pipeline industry, and general steel fabrication and design.

Zach Hershey

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Zach graduated from Penn State University with a BS in Mining Engineering and has over 16 years of experience in mining, both surface and underground. This includes processing plant operation, maintenance and efficiency. Zach has a diverse background from time spent in engineering, quarry operations management and a foundation in safety where he was on an underground mine rescue team for over 13 years.

Eric Endsley

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Eric has over 20 years of experience in the Ready Mix and Quarry industries.  He began in the industry after graduating from MTSU with a degree in Concrete Industry Management. Eric has a very diverse background in the Ready Mix industry ranging from plant maintenance, operations, QC to finally managing a multi-state operation for a national producer.




(931) 388-0626

Ask for Duane or Jared

204 Cemetery Avenue

Columbia, TN 38401

© Pugmill Systems, Inc

Made with pride in Tennessee