Western Alliance Bancorporation Announces Retirement of Arthur Marshall from Board of Directors

LAS VEGAS--(Business Wire)--
Western Alliance Bancorporation (NYSE: WAL) announced today that Arthur Marshall
will retire from the Board of Directors of Western Alliance Bancorporation and
Bank of Nevada October 31st. Mr. Marshall, who turned 80 earlier this year, has
been a Director of Western Alliance Bancorporation since 1995 and Chairman of
the Board of Bank of Nevada since its establishment in 1994. He served as
Chairman of the Board of Directors of the Company until December 2002.

Mr. Marshall was a co-founder of Marshall Rousso, now Marshall Retail Group, or
MRG, a privately owned retail apparel chain in the Western United States, and
served as its President from 1959 to 1988. He recently retired as a member of
the Nevada Gaming Commission. He is also a member of the national commission of
the Anti-Defamation League and a former board member of the Public Employees
Retirement System of Nevada.

About Western Alliance Bancorporation

Western Alliance Bancorporation is the parent company of Bank of Nevada, First
Independent Bank of Nevada, Alliance Bank of Arizona, Torrey Pines Bank, Alta
Alliance Bank, Miller/Russell & Associates, Shine Investment Advisory Services,
Premier Trust, and PartnersFirst. These dynamic organizations provide a broad
array of banking, leasing, trust, investment, and mortgage services to clients
in Nevada, Arizona and California, investment services in Colorado, and bank
card services nationwide. Staffed with experienced financial professionals,
these organizations deliver a broader product array and larger credit capacity
than community banks, yet are empowered to be more responsive to customers'
needs than larger institutions. Additional investor information can be accessed
on the Investor Relations page of the company's website,
westernalliancebancorp.com.

Western Alliance Bancorporation
Media:
Robert Sarver, 602-952-5400
Investors:
Dale Gibbons, 702-252-6236

Copyright Business Wire 2009