
Mariel is a mechanical engineer for NanoRacks, an aerospace company that operates the only commercial laboratory in space. Her official title - Payload Integration Engineer - means that she helps folks on earth (high schools, universities, research labs, etc.) send their experiments (payloads) into space.
More technically speaking, she acts as the customer interface for payload integration for Blue Origin New Shepard (the space vehicle) and leads an engineering team in the development and integration of payload hardware; provides human factors design input to payload developers, and; develops and reviews crew hardware interfaces, flight crew procedures, and payload requirements.