About Us

In 1955, Diversified Manufacturing Incorporated opened with the goal of creating and manufacturing the highest quality thermal engineering products. This mission led us from a small garage to our modern manufacturing facility. Today, we provide our local and international customers with full services in engineering, metal fabrication, machining, sheet metal, integration, assembly, and engineering support, all backed by the quality promise that's guided us for over 65 years.

From concept to production, DM is your trusted partner in thermal engineering.

original thermal product

Our History

1955 – 1976

Diversified Manufacturing opens in a 250 sq. ft garage in Lockport, NY by Mr. Tillotson, Mr. Frobgen, and Mr. Bald. The company grows quickly, purchasing Lockport Engineering and Fabrication Co., acquiring an ASME Code Stamp, and moving into a 40,000 sq. ft facility.

1976 – 1999

DM doubles the size of its facility to 80,000 sq. ft. The company is sold to Mr. Costello and goes on to acquire Rotary Company, a precision sheet metal manufacturer.

1999 – 2013

DM continues to purchase additional companies, including IPAC in 2004. Driven by commitment to quality, the company is certified by ISO, PP, the European PED, and acquires both the China and Korea Code Stamps.

metal fabrication plant icon


DM completes its biggest expansion yet, doubling to 160,000 sq. ft. The new facility houses state-of-the-art machine tools and fabrication and processing equipment. In 2021, Fairchild Capital Partners takes ownership of the company.

We Provide Solutions for

Our Certifications

Contact Our Sales Team

Alan Steighner

Director Sales and Marketing c: 716-374-4573 e: asteighner@DMImfg.com email

Bob Mladenovic

Vice President, Sales c: 716-432-7396 e: bmladenovic@DMImfg.com email

Diversified Manufacturing

410 Ohio Street Lockport, NY 14094 Hours: 9:00 - 4:00pm 716-434-5585 Contact Us