She is best known as the author of Her Naked Skin (2008), which was the first original play written by a living female playwright to be performed on the Olivier stage of the Royal National Theatre.
Her second play, The Night Season (2004), set in Sligo, tells the story of an Irish family, the Kennedys, and their attempts to find love.
[12] She and Abdulkareem Kasid also created a new version of The Soldier's Tale, a music theatre piece by Igor Stravinsky and Charles Ferdinand Ramuz, set in Iraq.
[14] In 2008, her adaptation of Henrik Ibsen's An Enemy of the People opened at the Arcola Theatre, directed by its founder Mehmet Ergen.
It describes the struggles faced by two suffragettes immediately prior to World War I. Faeries, was staged at The Egg, Theatre Royal Bath.
[20] Lenkiewicz's adaptation of Henry James' novella The Turn of the Screw was performed at London's Almeida Theatre (18 January – 16 March 2013).
It was directed by Lindsay Posner[21] In 2014 Lenkiewicz wrote a short play, We Two Alone, inspired by King Lear and commissioned by RIFT Theatre for their Shakespeare in Shoreditch Festival.
She translated Avec Norm (2004) by Serge Boucher, which was performed in a public reading at the Centre des Auteurs Dramatiques (31 July 2007).
[25] She wrote numerous productions for BBC Radio, such as: Fighting for Words (2005), Caravan of Desire, Blue Moon over Poplar (both 2006), The Man in the Suit, Sarah and Ken, Betty Lives in a Little Yellow House in Texas (all 2010), Burning Up and The Phone (both 2011).
She also wrote an adaptation of Dracula and The Winter House (2012), and a dramatisation of Anne Tyler's Dinner at the Homesick Restaurant (May 2013) and Ladder of Years.
The mother-daughter drama has an international cast including Emma Mackey, Fiona Shaw, Vicky Krieps, and Vincent Perez and is set in Spain.