The position is new. Mr. O'Hara will join the firm sometime in April and work alongside managing director James Keenan in running BlackRock's $155 billion global credit business.
Mr. Keenan will focus on investing and alpha generation for clients, while Mr. O'Hara will focus on the business. Messrs. O'Hara and Keenan will report to Mark McCombe, senior managing director, head of the Americas and global head of BlackRock alternative investors.
Mr. O'Hara was head of global markets at Credit Suisse. He was replaced by Brian Chin, co-head of credit, Credit Suisse said in an earlier news release.