As an astronomy writer, Wanjek worked at the National Aeronautics and Space Administration (NASA) Goddard Space Flight Center in Greenbelt, Maryland until 2007 and freelanced for astronomy magazines such Sky & Telescope and Astronomy.
Wanjek served as an astronomy writer at NASA's Goddard Space Flight Center in Greenbelt, Maryland from 2004 to 2007 and contributed articles to astronomy publications such as Sky & Telescope and Astronomy.