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What will I do for you?

My services include sourcing and assembling the musicians in the lead up to the each engagement, passing on all relevant information and payment of the musicians. I can often arrange to be on site to coordinate the musicians on the day. If I can't be there, I nominate a representative from within the group to liaise between the musicians and management in regard to logistical issues. My services can extend to producing hard copies of scores if necessary. 



String Source is an exclusive collective of the finest, most dynamic string players in Australia.

The musicians are hand picked for their exceptional talent and work ethic and are well regarded for achieving the ideal balance of a thoroughly professional attitude with an easy-going and flexible temperament.

They team years of experience with a fresh energetic approach. 

String Source musicians play regularly throughout Australia and overseas in elite chamber ensembles and symphony orchestras which are amongst the best in the world.

Whilst well-established and respected in the mainstream classical world, they are equally in demand for collaborations in a diverse range of genres.

Just a few of the high profile artists String Source musicians have collaborated with are Lana Del Rey, Neil Finn, Harry Connick Jr, Ricky Martin, Missy Higgins, Michael Buble', Guy Sebastian, Seal, Kanye' West, Ben Harper, Birds Of Tokyo, Kygo and Diana Krall.

Exceptional skills, attention to detail and immaculate presentation, make String Source musicians your ideal choice.

With teams in each city they're available throughout Australia for Concert Tours, Recording Sessions and  TV Appearances.

Interested in String Source for a wedding or event?

This page is probably better for you.

I had the great pleasure of working with Leah on our 2010 world tour. Not only did she hire the finest musicians for our TV spots and 6 concerts throughout Australia, she also played solo viola with the band.

Her string sections were well prepared and easy to rehearse. They knew how to swing and were total Pros.

I highly recommend her as a player, a colleague and a contractor.

Leah Zweck/String Source is simply the best!

Sylvia D’Avanzo – Lead Violinist, Harry Connick Jr. Band

I can’t tell you how much we appreciate all your help over the last few weeks. You were an enormous help.

Thank you very much for organising all the players, especially at such short notice. Every single person was amazing and it was a pleasure to have them join us.

Vince Pizzinga – Musical Director, Delta Goodrem

An absolute delight and pleasure Leah.

You and your musicians are exquisite players and all lovely as well!

Gaynor Crawford – Music Promoter

String Source has become a valuable resource for the State Theatre when negotiating with promoters and corporate clients.

Leah brings not only first class musicians and musicianship but also impeccably presented talent.

I will continue to make Leah and String Source our first call when seeking musicians for both public and corporate performances at State Theatre and I regularly encourage many colleagues and clients to do the same.

John Glenn - Former General Manager, State Theatre/Current Director Programming, Queensland Performing Arts Centre


Some contexts call for some feminine energy on stage and The String Sirens are happy to answer the call!

The String Sirens are fiercely talented female identifying musicians excelling in what was once a once male dominated field. They embrace femininity and combine impeccable skills and a passion for glamour.

With serious runs on the board in the classical music scene and extensive experience in the pop industry, The String Sirens are equally at home on the concert platform as in a rock arena.

Starting out in 2004 as a Sydney-based string quartet, The String Sirens have expanded to become a nation-wide phenomenon. They now have teams in all of the major cities in Australia and are the perfect choice for a large range of contexts.

The String Sirens have performed, recorded and toured with many high profile artists including:

Sam Smith, Jessica Mauboy, The Whitlams, Guy Sebastian, Michael Buble’, Kanye’ West, The Veronicas, Glenn Shorrock, Ryan Tedder, Harrison Craig, Pete Murray, The Living End, Delta Goodrem, Il Divo, The Ten Tenors, Human Nature, Bliss N Eso, Anthony Callea, Teddy Geiger, Luke Kennedy, Tommy Lee, Robbie Williams and Katy Perry.

They have appeared on TV shows such as:

“The Voice Australia”, “The X Factor”, “So You Think You Can Dance”, “Australian Idol”, “Australia’s Got Talent”, “Live at the Basement”, "The Footy Show", “Sunrise”, “Mornings”, “Today”, “Rove Live”, “The Max Sessions” and at The ARIAs.

Interested in The String Sirens for a wedding or event?

This page is probably better for you.

I've worked with Leah Zweck and the players from The String Sirens on many occasions – on television, at live events and in the recording studio.

The people in this group are professional, hard-working, easy-going and superb musicians.

John Foreman – Musical Director

I programmed the “String Sirens” as part of the “Reminiscing Tour” (starring Glenn Shorrock, Wendy Matthews and Doug Parkinson).

As a featured act, they opened the second half of the show with their Beatles Medley, which had the audience up and dancing in the aisles.

The “String Sirens” not only brought glamour to the show, but also fun and a real positive energy.​

Paul Dellit OAM – Producer, Queensland Performing Arts Centre​

The String Sirens are both sassy and classy.

They play with passion, they look sensational, and I have been grateful for their work with ‘Bravo’ at StarCity and with ‘Peter Cousens and Friends’ at the Darling Harbour Winter Festival.

Guy Noble – Conductor/Musical Director/Presenter