His career has included membership in the duo Two Guys from Boston, The Bait Shop, Bo Grumpus, and Jolliver Arkansaw.
He previously worked as a sought-after session musician in New York and Los Angeles, with artists such as Creation, Jackie DeShannon, John Lennon,[1] Yoko Ono, Felix Pappalardi, David Peel, and Paul Stookey.
The Duo then formed a band called Bo Grumpus which included drummer Norman Smart, formally of Mountain and Jim Colegrove, of Great Speckled Bird, on Bass Guitar.
Mottau collaborated and played guitar on John Lennon's albums Walls and Bridges, Some Time in New York City, and Rock 'n' Roll.
joining the Lennon all star band, including Jim Keltner, Klaus Voorman, Jesse Ed Davis, and Kenny Asher.