Nowalk was born in Point Pleasant, New Jersey and attended Brown University. He co-wrote The Hollywood Assistants Handbook, published by Workman Books in 2008. In same year he began working in the Shonda Rhimes medical drama series, Grey's Anatomy as recurring Writer and later executive story Editor and supervising Producer. He is also co-executive Producer of Scandal. Nowalk wrote "Everything's Coming Up Mellie", the seventh episode of the third season of Scandal in 2013.
