Philip Middleton Williams has written over forty plays ranging from one-minute to full-length, including "Can’t Live Without You," "All Together Now," "All Together Again," "All Together At Last," "Welcome to the Family," "Dark Twist," "Ask Me Anything," "A Moment of Clarity," "A Life Enriching Community," "Cooler Near the Lake," "A Tree Grows in Longmont," "Tucumcari Tonite!," "Chewie, Get Us Out of Here," "END OF PLAY.," "Home-Style Cooking at the Gateway Cafe," "A House by the Side of the Road - Seven Short Plays about a Family," and "The Sugar Ridge Rag."

"A Moment of Clarity" was a 2017 finalist and "A Life Enriching Community" is a 2020 finalist in the City Theatre National Award for Short Playwriting. “Can’t Live Without You” was his first play to receive a New York production at the Manhattan Repertory Theatre in January 2008 and was produced by The Playgroup for their 2018-2019 season at The Willow Theatre in Boca Raton, Florida. “All Together Now” won first place in the 2016 Playgroup playwriting contest and was produced as part of the Willow Theatre 2017-2018 season. His plays are published by ArtAge Senior Resources Center and Smith Scripts.

His work has been seen in the South Florida One-Minute Play Festivals, the Midwest Dramatist Conference, the William Inge Theatre Festival New Play Labs, Bartell Theatre of Madison, Wisconsin, Odenbear Theatre of Taos, New Mexico, Theatre Roulette of Columbus, Ohio, the Short+Sweet Festival of Sydney, Australia, the Valdez Last Frontier Theatre Conference of Alaska, Vermont Pride Theater, Silver Tongued Stages of Miami, Seaside Players of Lauderdale by the Sea, Theatre Arts Productions of Palm Beach, Open Eye Theater of Margaretville, New York, and Bendigo Theatre Company of Bendigo, Victoria, Australia. He is the author of the novel "Bobby Cramer," and has two other works in progress: "The Purer, Brighter Years" and "Small Town Boys."

In 1992 he was appointed to the national advisory board of the William Inge Theatre Festival. He has written numerous articles on the works of William Inge and Lanford Wilson and contributed to "The Facts on File Companion to American Drama," edited by Jackson R. Bryer and Mary C. Hartig. His doctoral thesis, "A Comfortable House – Lanford Wilson, Marshall W. Mason and the Circle Repertory Theatre," was published by McFarland and Company in 1993.

He has been a member of the Dramatists Guild since 1984.