Michael McGuinness, a corporate partner and former head of the Latin American M&A practice at Shearman & Sterling in New York, has left the firm for Jones Day, which over the past year has sought to slake its thirst for south-of-the-border clients by opening an office in Miami and making key lateral hires.

A veteran transactional lawyer, McGuinness left Shearman in late July and recently joined Jones Day’s New York office. Reached by phone Wednesday, McGuinness declined to discuss the circumstances surrounding his decision to leave Shearman and referred questions to a Jones Day spokesman, who did not immediately return a request for comment on the matter.