Lachlan is a graduate of The University of NSW [BA Theatre and English], Sydney University [Education], NIDA [Playwright’s Studio] and VCA [Directing]. His plays have been produced in Australia, England, Ireland, Northern Ireland, Scotland and the USA.

He is a long term collaborator with director and academic Dr. Alyson Campbell who has worked on many of his plays and directed premieres of his works Bison, Catapult, The Trouble with Harry. Together they work under the banner of their company wreckedAllprods.

Lachlan has been a writer in residence at The American Conservatory Theatre San Francisco, Cite Internationale des Artes Paris [through The Australia Council], Griffin Theatre Company, Sydney, Kansas State University, The Traverse Theatre Edinburgh as part of The Traverse Fifty, The Playwrights Foundation San Francisco and Red Stitch Theatre, Melbourne.

As a playwright Lachlan is proud to have worked with The American Conservatory Theatre San Francisco, Amnesty International, Australian Theatre for Young People, Belvoir Sydney, Bell Shakespeare, Brisbane Powerhouse, Canberra Youth Theatre, Checkpoint Theatre Singapore, La Comedie Francaise Paris, Cre8ion, Crowded Fire Theater San Francisco, Edinburgh Festival, Edinburgh University, Feast Festival Adelaide, Focus Theatre Sydney, Glen St Theatre Sydney, Griffin Theatre Company Sydney, Hothouse Theatre Albury, IronBark London, Kansas State University, La Boite Brisbane, The Lark New York, London Pride, Malthouse Melbourne, Mardi Gras Sydney, The Mac Belfast, Midsumma Melbourne, Melbourne Festival, MKA New Writing Theatre, The National Theatre of Croatia Rijeka, The New Theatre, NIDA,The NSW Drama Ensembles, Outburst Belfast, Oval House London, Perth Theatre Company, The Perseverance Theatre Juneau Alaska, Playwriting Australia, Q Theatre Penrith, PACT Sydney, The Playwright’s Centre Minneapolis, The Playwright’s Foundation San Francisco, Red Stitch Melbourne, Rock Surfers Sydney, Sydney Theatre Company,Tantrum Theatre Newcastle, Theatre Libre Saint Etienne, TheatreofplucK Belfast, The Traverse Theatre Edinburgh, Troisieme Bureau Grenoble, Red Stitch Melbourne, St Martins Melbourne, The Victorian College of the Arts and The Victorian Arts Centre.

Lachlan does extensive work as a teacher, mentor and dramaturg at theatre companies, schools and tertiary institutions around the world.

In 2013 he was awarded an Australia Council Cultural Leadership grant to study new play development models. This grant included residencies at The Playwrights’ Centre and The Lark Play Development Centre in the US. In 2016 he was awarded a six month residency in Paris in the Keesing Studio through The Australia Council.

As the inaugural Australian Professional Playwright Fulbright Scholar, Lachlan travelled to the USA in late 2014 to work with The American Conservatory Theatre San Francisco, The Lark Play Development Centre New York and Kansas State University.

Lachlan is currently developing new theatre work with The American Conservatory Theatre San Francisco, Barking Gecko Perth, Merringong Theatre, The National Theatre of Croatia Rijeka and Alyson Campbell, The NSW Arts Unit, Michael Sieders Productions and UK based director Emma Calendar. Lachlan is currently developing film work with Vanguard Productions and Dirty Films.

Lachlan was Chair of the Australian Writer’s Guild Playwrights’ Committee between 2012 and 2016.