Peter Senior was born in 1900 in Casorzo, part of the region of Piedmont in Northern Italy.

He arrived in Australia in 1922, and his musical career started in Australia in 1924 with his first concert appearances touring in Queensland.

Living in Sydney, Peter Piccini was the first accordionist to appear as featured soloist with the Isodor Goodman Orchestra at the St James Theatre, Sydney.

In 1934 he appeared in the movie Strike Me Lucky with Roy Rene. Other notable performances included the Tivoli Variety Show in Sydney and Melbourne as well as broadcasting on all national and commercial radio stations.

He also broadcasted with Jim Davidsons famous dance band on Radio 2CF Sydney, the Jack Davey Shows and with Sir Charles Moses on ABC stations.

He recorded for Regal Zonophone and Columbia Records.