Robert Palache, the former head of finance at Clifford Chance, has quit his post as joint head of the securitisation team at Nomura.
Palache left Clifford Chance at the end of 1998 to take up the role in the Japanese investment bank's principal finance group.
But he has quit after only two and a half years in the job because he says he wants a "change of scene". It is not clear where he is moving to.
In a statement he says: "Securitisation continues to have huge potential as a technique which works to the advantage of both issuers and investors, and I intend to remain at the heart of its continuing development."
Palache had been a partner at Clifford Chance for 18 years before he left for Nomura, and was appointed managing partner of the finance practice in 1996.
At Nomura, he shared the helm of the securitisation practice with Henry Cooke and was instrumental in securitisations such as Marne et Champagne's euro396m (£244m) deal.