Malcolm's work in theatre, opera and dance can be seen throughout the UK and worldwide.

His 2024 schedule includes Carmen (Glyndebourne); Der Rosenkavalier (Santa Fe Opera); Die Schöpfung (Oper Köln); Der Kleine Prinz (Musik Theater an der Wien); Madame Butterfly (Royal Danish Opera); Blue Beard (Wise Children UK tour); The Merry Wives of Windsor (Royal Shakespeare Company); Platée and Le nozze di Figaro (Garsington Opera); and Snow White (balletLORENT).

A full credits list is available by following the link above.

He was awarded the WhatsOnStage Award for Best Lighting Designer for his work on Brief Encounter and Six Characters in Search of an Author in the West End and a Village Voice OBIE as a member of the design team for Brief Encounter at St. Ann's Warehouse, New York. He was nominated for an Outer Critics Circle Award for Brief Encounter on Broadway; for a 2016 Los Angeles Drama Critics Circle Award for Tristan and Yseult; for the 2017 New York Drama Desk Award for Outstanding Lighting Design of a Musical for 946: The Amazing Story of Adolphus Tips; in 2018 for an OFFIE for Songs for Nobodies at Wilton's Music Hall and a Knight of Illumination Award for Falstaff at Garsington Opera; in 2019 for a Knight of Illumination Award for The Turn of the Screw at Garsington; and in 2021 was a finalist in the OFFIES for Afterplay at the Coronet.

From 2016 to 2017 he was responsible for the design of the temporary lighting installation at Shakespeare's Globe in London, and lit many shows both there and in their indoor Sam Wanamaker Playhouse including A Midsummer Night's Dream, Twelfth Night, Boudica, The Secret Theatre and Romantics Anonymous.

He collaborated with Kneehigh Theatre for twenty years, and was an Associate Artist of the company. Designs include Brief Encounter (West End and Broadway); Wah! Wah! Girls and The Umbrellas of Cherbourg (West End); The Flying Lovers of Vitebsk, Tristan and Yseult, 946: The Amazing Story of Adolphus Tips, The Wild Bride, The Red Shoes (all UK, USA); ​Dead Dog in a Suitcase (and other love songs) (Korea, New Zealand, Colombia, Shanghai); The Tin Drum, Nights at the Circus, Don John, FUP and Cymbeline.

Other recent theatre work includes ​My Brilliant Friend (National Theatre Olivier); Bagdad Cafe (The Old Vic); Songs for Nobodies (West End/Sydney Opera House); The MIrror Crack'd (NCPA Mumbai); Captain Corelli's Mandolin (West End); Wise Children (Old Vic & UK tour); Titus Andronicus, The Empress (Royal Shakespeare Company); The Gretchen Question (Fuel); Hamlet (Bristol Old Vic); Betty! A sort of Musical (Manchester Royal Exchange); Future Cargo (Requardt and Rosenberg); SOLAR - Klangwolke 2019 (Donaupark Linz); ​The Seven Pomegranate Seeds, Good Canary (Rose Theatre Kingston); Afterplay (Coronet Theatre); The Boy in the Striped Pyjamas (Chichester Festival Theatre/Children's Touring Partnership); Decade, Spring Awakening, Six Characters in Search of an Author (Headlong); Only the Brave (Wales Millennium Centre); Moon Tiger (Theatre Royal Bath); The Threepenny Opera (Graeae); God of Chaos (Drum Theatre Plymouth); Ours Was the Fen Country (Still House); The Promise (Donmar at Trafalgar Studios); London (Paines Plough); Belong, The Acid Test, Spur of the Moment and Kin (Royal Court); His Dark Materials (Birmingham Rep); HMS Pinafore (Guthrie Theater Minneapolis); The Pitchfork Disney (Arcola); A Very Old Man with Enormous Wings (Little Angel Theatre); Stones in His Pockets (Tricycle Theatre); Calendar Girls (West End, Australia and Canada); The Field (Olympia Theatre Dublin); Little Women (Gate Theatre Dublin); The Dead (Abbey Theatre Dublin); Richard III (Northern Broadsides); The Devil Inside Him (National Theatre Wales); Tutti Frutti (National Theatre of Scotland); After Dark (balletLORENT).

Opera credits include The Wreckers (Glyndebourne); Rusalka, Alcina, Capriccio (Santa Fe); Orpheus in the Underworld (English National Opera); Madama Butterfly (Oper Graz); Hercules (Badisches Staatstheater Karlsruhe); Werther (Opéra de Marseille); Stiffelio (Opéra national du Rhin); Breaking the Waves (Theater St. Gallen); Mitridate Re di Ponto, Rusalka, Der Rosenkavalier, Eugene Onegin, The Turn of the Screw, Don Giovanni, Falstaff, The Skating Rink, Pelléas et Mélisande, Idomeneo, Der Stein der Weisen, Armida, Le nozze di Figaro (Garsington); Ivan the Terrible (Grange Park Opera); War and Peace, In Parenthesis, The Seven Deadly Sins (Welsh National Opera); Who put Bella in the Wych Elm? (Almeida Aldeburgh Opera); Giovanna d'Arco, Lucia di Lammermoor, Orfeo ed Euridice, The Jacobin (Buxton Festival); Le Premier Meurtre (Le Balcon at Opéra de Lille​); Pleasure, The Coronation of Poppea (Opera North); La Belle Hélène (Opéra national de Lorraine​).

He is a member of the Association of Lighting Designers and Equity in the UK and of United Scenic Artists Local 829 IATSE in the US and Canada.

He lives in London.