Rich Koslowski is best known for his fan-friendly comic book series The 3 Geeks (later Geeksville), as the recipient of three Eisner Award nominations, and for the much-lauded graphic novel Three Fingers in 2002 (published by Top Shelf Productions), which won the coveted Ignatz Award for Outstanding Graphic Novel and was named as one of the 500 Essential Graphic Novels by HarperCollins in 2008.

In 2005, his second graphic novel with Top Shelf, The King, was released and has been published in multiple foreign languages. In 2007, he wrote his first novel, a Christmas thriller entitled The List. 2008 brought Koslowski his first writing assignment for Marvel Comics, rebooting their popular Guardian character, now named Weapon Omega. Koslowski's writing of Weapon Omega was recognized with a Prism Award. In 2010, his third graphic novel with Top Shelf, BB Wolf and the Three LPs, was released and Koslowski won the Glyph Award for Best Artist.

He has worked as a writer and artist for companies such as Marvel, Dark Horse, Bongo, Archie, Boom! Studios, DIC, Saban, and many more.