During the last 24 years Jeunesse has been briefed regularly to appear and to advise: insurers, the NSW Police Force (NSWPF) and various other government agencies. In recent years she has also been briefed in a range of matters for the Department of Education and the Department of Communities and Justice.

Jeunesse has extensive advocacy experience, particularly in matters in the District and Supreme Courts of NSW. She has appeared in the Law Enforcement Conduct Commission (LECC) on a number of occasions for the Commissioner of Police as well as individual police officers. Jeunesse was involved in drafting and submitting submissions on behalf of the NSWPF to Parliament regarding strip search practices of the NSWPF in relation to minors.

Jeunesse has been briefed to appear in numerous coronial inquests for medical practitioners, nurses, private hospitals, Health NSW, Roads and Maritime Services (now Service NSW), Sydney Trains, Ambulance Officers and the NSW Police Force and the Department of Education.

Jeunesse has been briefed in two significant matters for the Department of Education, the Regulator of childcare services in New South Wales pursuant to the Children (Education and Care Services) National Law (NSW) (National Law) and the Education and Care Services National Regulations (NSW) (National Regulations). One of those matters continues to progress, in the other one findings were handed down in December 2021.