Swierczynski was born and raised in Frankford, a neighborhood in lower Northeast Philadelphia. He lived at 4738 Darrah Street. After leaving in the late 1990s and making several stops elsewhere, in 2002, he moved to another neighborhood in Northeast Philadelphia, where he currently resides.
Swierczynski has written six non-fiction books, including This Here’s A Stick-Up: The Big Bad Book Of American Bank Robbery (Alpha, 2002) and The Big Book O’ Beer (Quirk, 2004).
He’s worked as an editor at Men’s Health and Details as well as Philadelphia magazines including the Philadelphia City Paper, where he left in February 2008.
Secret Dead Men, Swierczynski’s crime fiction debut, was published in 2005 by PointBlank and has since written three further novels.
Swierczynski has signed an exclusive deal with Marvel Comics. Recently he has penned two one-shot comics for Marvel Comics, namely Moon Knight: Annual #1 and Punisher: Force Of Nature, and is writing the new ongoing Cable and Iron Fist titles. He is also writing Werewolf By Night, a Bishop story and the X-Men-related event Messiah War.
Lion's Gate Entertainment has picked up Swierczynski's novel Severance Package and has hired Brett Simon to direct the film and co-write the script with Swierczynski.
Swierczynski is known for using a variety of social media tools, including Twitter and Blogger.
He is married and has two children. His first-born son “Parker” is named in honor of the Richard Stark character and Spider-Man (Peter Parker).