Previously Tamayo served as Director of IT development and infrastructure management for the Commercial Business and Leasing Group at Citigroup. In his role as CIO, he will report to Michael E. Cahill, OCC President and Chief Operating Officer, and will be responsible for all OCC Technology Services.

"We are very pleased to be able to name a new CIO with the extensive background in information technology in the financial industry that Ray brings. He is a terrific addition to OCC," said Cahill.

Tamayo brings over 20 years of experience in management-level IT and operational positions where he achieved success in start-up, turnaround and high-growth ventures. Over the last five years at Citigroup, he led strategic initiatives for the consumer bank and oversaw several company initiatives such as improving performance on critical applications and consolidation within the data center, infrastructure and development site areas. Before working at Citigroup, Tamayo founded a start-up management consulting firm. Prior to that he served in many capacities at HSBC Securities including Managing Director, Executive Director and Chief Information Officer as well as Executive Vice President for Republic National Bank of New York, which was acquired by HSBC in 2000.

Tamayo has a Bachelor of Science in Finance & Marketing from Boston College.

"I look forward to applying my skills and experience to help OCC maintain its leadership in the technology for derivatives clearing and settlement," Tamayo said. "I'm excited to join a team with the reputation for innovation that OCC has in serving the needs of its exchanges, clearing members and helping preserve the soundness of the marketplace."