There is little/no room for vertical growth in the test rack. Employee reviews are not based on any objective standard, which inevitably means ratings do not accurately reflect individual employee performance. 401k receives only partial vesting after 2 years, 6 to vest fully. 12 hours standing and exposure to dust and fumes is unavoidable. Occasionally there is pressure to work through break times to complete tasks, and different departments will place emphasis on different priorities. There is a significant language barrier between different racial and ethnic groups on the shop floor, and there is no good translation app or service for the main language (Zomi) that you will encounter. Because AAON is a 2nd chance employer, you will be working with some folks with unsavory backgrounds. This includes pedophiles, so be wary of who you are friendly with. Shop conditions inside are heavily dependent on outside temperature, with extreme seasonal hots and colds.