Leisa has been involved in musical theatre and cabaret now for 15 years, and has musically and vocally directed, and performed in over 40 shows. These shows include "Beauty and the Beast", "Chess", "A Chorus Line", "Little Shop of Horrors", "West Side Story", "Jesus Christ Superstar", "42ND Street", "Big River", "Me & My Girl", and many others.

After training in classical piano for 12 years, Leisa then went on to study jazz vocals at the Canberra School of Music, under the direction of Gery Scott, for 6 years. It was here that she also gained the valuable writing and arranging skills that have assisted in her musical direction and performance, making her one of Canberra and Sydney’s most sought after accompanists and musical directors.

Leisa performed the role of "Lucy Harris" in the Australian premiere production of "Jekyll & Hyde", playing opposite Donald Cant as Jekyll/Hyde. This performance lead to her winning a CAT award for Best Actress in a Musical.

Onstage credits include playing Mrs Potts in "Beauty and the Beast" for G-String Productions, The Plant in "Little Shop of Horrors" for SUPA Productions, & "Hot Mikado", "ACT 2", "One Enchanted Evening", "Opening On Broadway", "Red Hot & Cole" & "Sensationally Sondheim" for the Canberra Philharmonic Society. Leisa also played the Fairy Godmother in "Cinderella", the Dolly Parton Pig in "The 3 Little Pigs", and Wishy Washy and the Genie in "Aladdin". She has also made several appearances with the Royal Military College Duntroon Band, as a soloist at the popular Music at Midday concert series.

In 2000, Leisa toured with Todd McKenney, (star of “The Boy From Oz” ) performing with him in his cabaret show “Feeling Myself Again” , as his musical director and backing vocalist. Leisa has also had the privilege of working with other artists such as Simon Gallaher and Jon English in Essgee’s production of "HMS Pinafore" in 1997, and again in early 2002 in "The Pirates Of Penzance".

She has also worked with Hazel Phillips in "Marilyn & Me" , 2 past winners of the Sydney Cabaret Convention, Peter Casey (1999) and Annie Frances.(2000), Noni Hazelhurst, in a delightfully hilarious "Playschool" gig, and also in the orchestra of the touring show "The Lion, the Witch & the Wardrobe" in 2003. Leisa was musical director for the Australian Premiere of "Careful He Might Hear You – the musical" , starring Toni Lamond, and was also appointed vocal coach to Amanda Muggleton, in preparation for "Hello Dolly" & "The Lion, The Witch & The Wardrobe".

Leisa performed at the School of Arts Cafe on many occasion as Musical Director and performer. These shows included "Just Add Champagne" with Jason-Scott Watkins, "A Love Affair", with Annie Francis, "Are You Calling Me Fat?" with Lisa Adam and Adam Champion, "Llynda Nairn’s Juggling Life", and finally with Todd McKenney.

In her spare time, Leisa performs around Canberra and Sydney as a piano vocalist in various venues, and with several jazz combos, including “The Leisa Keen Trio” , "Night and Day",  “Lounge Sweet”, and the "Black Mountain Jazz Band". She also frequently accompanies other artists in Canberra, Sydney and Melbourne, as well as taking her various bands to jazz festivals all over Australia. Leisa teaches piano and singing 5 days a week, just so that she doesn’t get bored!!!!!