Ros Jennings studied classical piano from the age of seven and also studied violin for seven years. She later studied in the South Australian College of Advanced Education. Ros later accompanied The Adelaide Connection vocal jazz ensemble, performing with the likes of Don Burrows, James Morrison, Errol Buddle and various international touring big bands. She studied jazz piano and arranging with the legendary local educator/performer and former ABC Radio Orchestra arranger Eric Bryce. Ros took up the bass guitar in 1986 and performed in Adelaide nightclubs with a nine piece funk and dance band Bounce To The Ounce. She then performed for six months as resident pianist at the Hahndorf Inn in the Adelaide Hills area.

In 1988, Ros joined the local band Down Under as a back-up singer who also performed on bass guitar and keyboards. She became musical director of the Ararat City Brass band in 1989. She performed as keyboardist/vocalist for Sister Suzie’s Beat Boys in 1990 and enjoyed a twelve months residence at the George Hotel in Ballarat. During 1992-96, the band reduced to the duo Uptown with Ros taking the lead in vocals. She also played keyboard and tenor saxophone, and created all back-up sequences. Ros also composed, orchestrated and recorded the music for four original musical comedies. After traveling overseas in 1997, Ros relocated in Melbourne to work exclusively as a musician. Throughout 1998 Ros predominantly worked around Melbourne and the neighboring suburbs playing mostly in clubs and bistros.

Most recently, Ros has been performing piano bar engagements in international five star hotels, including long term engagements in Japan and the United Arab Emirates.