Sonny Sonnenstein is Chief Information Officer for Western Alliance Bank.
As CIO, Mr. Sonnenstein oversees all technology groups and functions for the Bank, including hardware, software, and key vendor relationships. He reports to the Chief Banking Officer.
Mr. Sonnenstein brings more than 30 years of experience to his role at Western Alliance Bank, having served in senior-level roles in banking, technology and management consulting. Most recently, he was the group CIO for consumer, business and digital banking at New York-based M&T Bank, where he spearheaded significant modernization and innovation efforts.
Prior to M&T, Mr. Sonnenstein was enterprise CIO at Umpqua Bank and, before that, deputy CIO at First Horizon. His early career was spent in consulting with PriceWaterhouseCoopers, where he worked with leading domestic and global financial service companies on strategy and technology projects, as well as in the banking industry with Wachovia (now Wells Fargo).
Mr. Sonnenstein earned both his Bachelor of Science degree in Business Management and his Master of Business Administration in Finance and Management Information Systems at Cornell University.
Western Alliance Bank
With more than $80 billion in assets, Western Alliance Bancorporation is one of the country’s top-performing banking companies. Its primary subsidiary, Western Alliance Bank, Member FDIC, offers a full spectrum of tailored commercial banking solutions and consumer products, all delivered with outstanding service by banking and mortgage experts who put customers first. Major accolades include being ranked as a top U.S. bank in 2024 by American Banker and Bank Director and receiving #1 rankings on Extel’s (formerly Institutional Investor’s) All-America Executive Team Midcap 2024 for Best CEO, Best CFO and Best Company Board of Directors. Serving clients across the country wherever business happens, Western Alliance Bank operates individual, full-service banking and financial brands with offices in key markets nationwide.
