At age seven, she switched to alto saxophone and later began playing in a local concert band Jeugd Doet Leven (English translation: "Youth Brings Life") in Zuiderwoude.

[2] In 1982, when she was twelve years old, she played as a member of Rosa King's Ladies Horn section at the North Sea Jazz Festival.

[2] Dulfer performed session work with Eurythmics guitarist and producer Dave Stewart, duetting with him on the worldwide hit single "Lily Was Here" and contributing to the soundtrack of the same name.

[4] The Knebworth show has since been released as part of the Pink Floyd box set The Later Years 1987–2019 on CD, DVD, and BD.

Dulfer was also the featured saxophonist on Van Morrison's A Night in San Francisco, an album in 1993,[5] and performed with Alan Parsons and his band at the World Liberty Concert in 1995.

[1] Until 2010 Dulfer played a Selmer Mk VI alto - which is visible in the majority of early photographs.

In 2007, Dulfer became the presenter and interviewer in Candy Meets..., her television program for the Dutch public broadcaster NPS.

In the series, she met with Sheila E., Maceo Parker, Hans Dulfer, Van Morrison, Dave Stewart, and Mavis Staples.