Management Team

Leontine Hass


Susannah Gidley


John Peek

John has been working as a performer, producer, director, and educator for twenty-three years. Having worked with many of the best performers and creatives our industry offers, John’s professional performance history has encompassed over 60 productions of Theatre, Musical Theatre, Opera, and Oratorio, as well as vast commercial and concert engagements.

John has also directed acclaimed seasons of Rent and Sweeney Todd, plus The Magic FluteAn Opera OdysseyThe Callback, and The Merry Widow. In 2013, he co-wrote, directed, and produced the opening ceremony of the International Convention of Voice Teachers after producing The Last Five Years a year earlier. In 2015, he received a Matilda nomination for Best Production and Best Director for his project Slammed. 

Since completing four degrees, including a masters, John has also been in demand as a singing and musical theatre performance teacher. For the past eight years, he has been teaching in the Musical Theatre course at the Queensland Conservatorium Griffith University, before which he taught singing at the University of Southern Queensland and held the position of Head of Musical Theatre at the Australian Dance Performance Institute. He also, now consults and teaches for the amazing new Associated Studios Australia, over from the West End UK, headed by world renowned Leontine Hass.

Being so passionate about young artists’ holistic development has led many of John’s students into fruitful professional performance careers, including leading roles and covers in national and international tours of vast numbers of professional productions the likes of Les Miserables, Book of Mormon, Phantom, Cats and so many more.

Leontine Hass – CEO

Leontine Hass is currently vocal coach for Motown at The Shaftesbury Theatre London. She has served as vocal coach to Matt Henry (Lola in Kinky Boots West End), Alice Stokoe (Sophie in Mamma Mia, West End), Gloria Onitiri (Lead in The Bodyguard & Hair, West End), Claire Sweeney (Tell Me on a Sunday) and many other leads and swings in the West End, national and international tours of productions such as Thriller-Live, Oliver!, Carousel, Parade, Tell Me on a Sunday, The Lion King, The Phantom of the Opera, Witches of Eastwick, Nine, The Wizard of Oz, Ragtime, Sweeney Todd, Cats, Sister Act, We Will Rock You, Footloose, Wicked, The Sound of Music, Ghost, Hairspray, Porgy and Bess, The Bodyguard, Jesus Christ Superstar, Jersey Boys, Barnum, Miss Saigon, Book of Mormon, Mamma Mia, In the Heights, The Color Purple, Memphis, Spamalot, Les Miserables, Miss Saigon, Aladdin, Chicago, The Pyjama Game, Kinky Boots and the upcoming production of Dreamgirls.

Leontine coaches members of The Swingle Singers, Collabro, The Magnets, The Sons of Pitches and classical singers with ENO, Welsh National Opera and ROH, as well as Pop/Rock/Jazz singers. Leontine was the Vocal Coach for shows including the London premiere of Bernarda Alba the Musical, and currently the a cappella hit, ‘Gobsmacked’.

Leontine teaches workshops and lectures internationally on singing, voice and performance. She rehabilitates voices after surgery, or as surgery prevention. She has taught at leading Music & Drama Schools including GSA Conservatoire, the Oxford School of Drama, Mountview, LSMT, YMT, The Brit School, La Salle (Singapore), the Queensland Conservatorium, Centre Stage and The VCA (Melbourne).

Leontine has acted as vocal consultant to various music management/production companies, including ITV and the BBC. Leontine is vocal coach for ‘The Voice’ for BBC TV. She was featured as a mentor/vocal coach on the Gareth Malone show, ‘The Naked Choir’, for BBC2 and will also be involved with Series 2. She is a regular columnist at and for The Stage newspaper. She is a contributor to ‘The Singer’s Complete Guide to Vocal Health’ (Oxford Uni. Press), and advisor/contributor to ‘The Ultimate Guide to Singing’ published by TC Helicon in 2014.

Having originally trained as a classical singer (BA, Melb. Uni, BMus. Kings College London, Dip. RAM), Leontine has performed as a singer and actress in concert, theatre and TV.

Leontine is the CEO/Founding Principal of the Associated Studios Performing Arts Academy London, which she founded in 2007, then based at The Royal Academy of Music. Associated Studios provides full-time and part-time training and professional development in Musical Theatre and Opera ( The Board of Directors includes Rory Bremner (Chair), Patrick Lawrence QC and Dr Christopher Stewardson. Patrons include Sir Tim Rice, Jeremy Irons, Jeremy Herrin, Timothy West and Scott Alan.

Leontine is represented by Lesley Duff at Diamond Management.