Marc Tillett Email Address

Senior Vice President, Director of Information Technology

Square 1 Financial, Inc., headquartered in Durham, North Carolina, is the parent of Square 1 Bank, a North Carolina commercial bank with approximately $3.1 billion in assets at December 31, 2014, one banking office in Durham, and twelve loan production offices throughout the United States. In connection with the transaction, Square 1 Bank will be merged into Pacific Western Bank, the Los Angeles-based, wholly-owned subsidiary of PacWest Bancorp. PacWest had $16.2 billion in assets at December 31, 2014 and 80 branches located primarily in southern and central California. The combined company will remain headquartered in Los Angeles and will have senior executives from each of the organizations in key positions. Upon completion of the transaction, one former Square 1 director will be appointed to the PacWest board. The transaction, currently expected to close in the fourth quarter of 2015, is subject to customary conditions, including the approval of bank regulatory authorities and the Square 1 stockholders. Certain stockholders of Square 1 have agreed to vote in favor of the transaction.

• 13+ years leading information technology infrastructure and support operations. • 8+ years of executive level experience architecting and managing high availability IT services. • Innovative and adaptive leader with hands-on experience in IT solution development and implementation. • Proven ability to manage multi-million dollar budgets to maximize return on investment (ROI). • Substantial project management and implementation experience with a history of outstanding results and service. • Significant leadership experience in software integration, business analysis, systems administration, and security.