Johnna has acted as dramaturg on a number of new Canadian plays, both with Solo Collective and through associations with other theatres. She is currently, with Will Brooks, Literary Manager for Persephone Theatre in Saskatoon, and also works on a freelance basis in this arena.

In 2008 Johnna provided dramaturgical support to playwrights Dennis Foon, Lorena Gale and Ian Weir as they wrote new plays to be premiered by Solo Collective.

Other highlights of play development include Landscapes of the Dead by Aaron Bushkowsky, Pink Sugar by Natalie Meisner and Killjoy by David Mackay (nominated for Jessie Richardson Awards for Outstanding Original Script, Direction and Performance - awarded), The Fireplace by Anton Piatigorsky (subsequently read at Tarragon Theatre in Toronto), Dogbarked by James O'Shea (premiered by Persephone Theatre in 2003), Out of the Blue by Laurie Murdoch with the Gateway Theatre's SceneFirst series of staged readings, and Curtain Call by Blaine Newton for the Saskatchewan Playwrights Centre's SpringFest.

Johnna is a member of Literary Managers and Dramaturgs of the Americas (LMDA).