The submarine is both a physically and mentally demanding environment as submariners are deployed for extended periods of time. This poses severe and adverse effects on their health and performance. One of the challenges they face is performing physical tasks like heavy lifting and repetitive motions in cramped spaces which can result in musculoskeletal injuries and back pains. The goal of this project is to design a wearable, ergonomic, and unobstructive device to collect data regarding the body posture of the user through accelerometers. The device tracks upper back movements in submariners by recording accelerations through sensors placed at specific vertebrae along the spine. The sensors are integrated into a comfortable vest worn over the submariner’s uniform. The device provides the angles at which the upper back tilts during daily activities that submariners perform.