EulessAero developed out of a company called Trio Manufacturing that was formed in 1965 with a few skilled machinists making parts manually. As the company grew over the years, additional experienced technicians were hired.

In 1980, EulessAero established its headquarters in Euless, TX and transitioned from manual machining practices to CNC machining, which allowed for machining of more complex parts. Aerotech Engineering (Aerotech), which was formed as an FAA-PMA parts manufacturer, was one of the companies that commissioned EulessAero to make parts for them on a regular basis. EulessAero enlisted William Montgomery in 1999 to help with strategic management and decisions. In 2005, after working together for years and recognizing strengths they offered each other, EulessAero and Aerotech (co-founded by David Baker, an experienced aviation executive) merged their businesses (and is later referred to as EulessAero). During the same year, EulessAero implemented Industrios ERP to continue the transition of the company from a traditional job shop to a manufacturing facility that achieves the industries’ most demanding tolerances by employing state-of-the-art equipment, extensive parts manufacturing experience and adaptable cost effective processes.

In an effort to continue bringing talent into the company, Chris Baumann, who has 20 years of manufacturing experience and 15 of them in aviation, was hired as the Manufacturing Manager. In 2007, EulessAero, a precision complex parts manufacturer, parts developer and engineering facility, increased its manufacturing capabilities to include exotic and plastic materials. The following year Patrice Sparks, a longtime aviation industry expert, was hired as Director of Quality. In 2009, Sky USA was purchased to continue expanding EulessAero's machine capabilities. In 2012, EulessAero bought ACP, who had a long history of working with recognized names in the industry, and this acquisition changed ACP’s focus from minor repairs to converting high-value expendable parts into rotables. Later in 2012, EulessAero diversified its services by starting Aervit, a specialist in the acquisition and teardown of commercial aircraft, providing rotable spares directly to its airline, MRO and OEM partners, along with ACP and Atlas Aerospace (two of Aereos’ other companies) in support of their rotable exchange core services. In 2013, Chris Baumann was promoted from Manufacturing Manager to COO. In 2014, Aereos, the newly formed parent company of Atlas Aerospace, ACP, EulessAero and Aervit, bought MMI Precision in Phoenix, Arizona and moved its experienced personnel and assets to EulessAero to increase the industry knowledge base and the number and types of machines, allowing EulessAero to increase its production capabilities.