EXPERTS IN PUMP SERVICES AND CUSTOM MACHINING
- Machine Tool Design and Manufacturing
- Nuclear and Fossil Pump Repair Service
- CNC and Robotic Buffing and Polishing Systems
- Prototype Machining and Contract Manufacturing
OUR HISTORY
Founded in 1874 by Dr. Charles G. Allen, our company has proudly served the American manufacturing industry for over 150 years. Built on a foundation of innovation and craftsmanship, Chas. G. Allen, Inc. has continually expanded its capabilities to meet the evolving demands of industry.

Over the decades, we’ve grown by acquiring leading companies such as Harper Mass Finishing, Fitchburg Engineering, Allen Pump, and LA Simpson Machine Company, strengthening our in-house expertise across multiple disciplines.
Today, our fully equipped 100,000+ square-foot facility allows us to handle every aspect of precision machining, parts manufacturing, and pump repair in-house. With AS9100D / ISO 9001:2015 certifications and ITAR compliance, we maintain the highest standards of quality, traceability, and performance. Trusted by Fortune 500 companies and industry leaders alike, we deliver reliable, American-made solutions built to exceed expectations.