Marc D. Graff serves as Senior Vice President and Chief Financial Officer of Ciena Corporation, a global leader in networking technology, where he has been instrumental in driving the company's financial strategy since joining in 2012. Graff oversees all aspects of Ciena's global finance organization, including financial planning and analysis, accounting, tax, treasury, investor relations, and internal audit. With over 25 years of experience in the telecommunications and technology sectors, he brings a proven track record of optimizing financial operations and supporting growth in dynamic markets. Prior to Ciena, Graff held key finance leadership roles at XO Communications as Senior Vice President and CFO from 2008 to 2012, and at Nextel Communications (now part of Sprint), where he advanced through positions such as Vice President of Finance for International Operations. Under Graff's leadership, Ciena has achieved significant milestones, including consistent revenue growth, improved profitability, and successful execution of strategic initiatives such as acquisitions and capital allocation programs. Notably, he played a pivotal role in navigating the company through economic challenges and market shifts, contributing to record financial performance and enhanced shareholder value. His efforts have earned recognition, including being named to the CFO Leadership Council and receiving accolades for excellence in financial reporting and investor communications. Graff is a Certified Public Accountant and holds a Bachelor of Science in Accounting from the University of Maryland. His strategic foresight and operational expertise continue to position Ciena for sustained success in the evolving optical networking industry.