MET Laboratories Inc. was founded by Leonard Frier as Maryland Electrical Testing in 1959. As the customer base quickly expanded across the nation, the name was changed to MET Electrical Testing Company. Originally, the company focused on testing high voltage electrical transmission and distribution systems.

In the early 1970s, MET began product safety listing services. Later MET was among the first laboratories to perform EMI and telecommunications testing to the emerging FCC regulations.
In 1989, MET became the first Nationally Recognized Testing Laboratory (NRTL) in the United States for testing and certifying products to UL safety standards.

In 1992, MET changed its focus exclusively to testing and certification of electrical products – whether in the laboratory or at customer locations. Consequently, the name changed to the present MET Laboratories. Later that year, the MET test report became accepted in 30 countries through the IECEE Certified Body (CB) Scheme.

From 1999 to 2012 MET established operations in 5 new locations world wide. These included a full service laboratory in Union City, California, operations in Shenzhen, China, full service laboratory in Santa Clara, California, full service laboratory in Austin, Texas, and operations in Milan, Italy.

MET has been a pioneer in testing and certification services and continues to be in the forefront of the electrical standards industry.