The appointments fill vacancies created by the departure of Ewen Stevenson, who has left Credit Suisse to become chief financial officer at Britain's part-nationalised Royal Bank of Scotland.
Echlin takes on his new position alongside his current role as co-head of Credit Suisse's global industrials group. Pryzgoda was previously co-head of global FIG alongside Stevenson.
(Reporting by Matt Scuffham; Editing by Chris Vellacott)