Rondinelli took up drumming at the age of 11 having previously played guitar.
While playing with Rainbow, Rondinelli was featured on a performance recorded live in San Antonio, TX for MTV. He missed out on replacing Peter Criss in 1981 to Eric Carr because as Carr put it, his vocals were better than Rondinelli. His drum solo from this show was featured. Rondinelli also recorded the drum portions for the Scorpions' much lauded and big-selling 1984 Love at First Sting album. Rhythm guitarist Rudolph Schenker wanted him to join the Scorpions full time but since they were the first successful German rock band in America the management wanted to keep the band German. He played with Black Sabbath on the albums Cross Purposes and Cross Purposes Live and was a member in 1994 and again in 1996. He also played in the bands Rondinelli and Sun Red Sun with Ray Gillen.
Rondinelli regularly holds drum clinics and is co-author of The Encyclopedia of Double Bass Drumming published by Modern Drummer.
His drum kit includes Ludwig Drums with Attack drumheads, Paiste cymbals and gongs, and he plays with Vater sticks.