Peter Macmanus began his career in New York working at Miramax Films and Focus Features before segueing into television production at AMC Networks, where he worked as an executive on such series as Breaking Bad, Rubicon, and The Prisoner. After moving to Los Angeles, he sold a number of dramas including period thriller Seward's Man with MRC, Fly By Night with USA, UCP and Dark Horse, a reboot of Miami Vice with NBC and Chris Morgan Productions, and his debut script Hurt People, which was originally developed at Cinemax with Graham King producing. 

His latest television script Harlem River is currently in development at Peacock/MRC with Riley Stearns directing (The Art of Self-Defense, Dual). In addition, his WWII drama Reich has been optioned by Telepool/Westbrook International, and his limited series A Conspiracy in 3 Parts, a genre bending thriller about his struggles with undiagnosed bipolar disorder, is currently in development at Plan B.

In addition to his television development, Peter has staffed on multiple shows (USA's Satisfaction, SPIKE TV's The Mist, and SYFY'S Happy!) and his western crime feature Desperate Hours has Kelsey Grammer starring with David Gale (Election) and Macmanus producing.

An avid Philadelphia sports fan, Macmanus was raised in New Jersey and now resides in Westbury, NY with his wife and four children.