This paper focuses on science, technology, engineering, and math (STEM) workers in the manufacturing sector. About one in 10 or 15.6 million, U.S. workers 16 and over, worked in the manufacturing sector in 2017. About 2 million of these workers were in STEM occupations. The manufacturing sector is defined as those industries that use raw materials to produce finished goods. STEM workers are people who work in computer, mathematical, engineering, and life, physical, and social scientist occupations. This research asks: 1) Who are the STEM workers in the manufacturing sector?; 2) In which industries are STEM workers working?; and 3) How does STEM work in manufacturing compare with other sectors?