WESCO International, Inc. To Announce Second Quarter 2009 Earnings on July 23, 2009;...

WESCO International, Inc. To Announce Second Quarter 2009 Earnings on July 23,
2009; Conference Call and Live Webcast Scheduled for 11:00 A.M. ET
Contact: Stephen A. Van Oss, Senior Vice President, Finance and
Administration

PITTSBURGH, July 13 /PRNewswire-FirstCall/ -- WESCO International, Inc. (NYSE:
WCC), a leading provider of electrical MRO products, construction materials
and advanced integrated supply procurement outsourcing services, will announce
second quarter 2009 earnings on Thursday, July 23(rd), before the opening of
the New York Stock Exchange. The Company will host a conference call at 11:00
A.M. Eastern Time that day to discuss the earnings results with securities
analysts and institutional investors.

(Logo: http://www.newscom.com/cgi-bin/prnh/20030508/WCCLOGO )

The call will be available via conference call as well as a live audio webcast
that can be accessed by clicking on the microphone icon on WESCO's home page
at the www.wesco.com website. The call replay will be available on the WESCO
website through midnight, Wednesday, July 29(th), 2009.

Dial in for the call is as follows:

Conference telephone number:

Participant Dial In: 800-860-2442
International Dial In: 412-317-0088
Confirmation Code: 431627

Replay: 877-344-7529
International Replay: 412-317-0088
Replay available from 1:00 PM ET July 23(rd), 2009 thru midnight ET July
29(th), 2009.
Confirmation Code: 431627

WESCO International, Inc. (NYSE: WCC) is a publicly traded Fortune 500 holding
company, headquartered in Pittsburgh, Pennsylvania, whose primary operating
entity is WESCO Distribution, Inc. WESCO Distribution is a leading
distributor of electrical construction products and electrical and industrial
maintenance, repair and operating (MRO) supplies, and is the nation's largest
provider of integrated supply services. 2008 annual sales were approximately
$6.1 billion. The Company employs approximately 7,200 people, maintains
relationships with over 24,000 suppliers, and serves more than 110,000
customers worldwide. Major markets include commercial and industrial firms,
contractors, government agencies, educational institutions, telecommunications
businesses and utilities. WESCO operates seven fully automated distribution
centers and approximately 400 full-service branches in North America and
select international markets, providing a local presence for area customers
and a global network to serve multi-location businesses and multi-national
corporations.

The matters discussed herein may contain forward-looking statements that are
subject to certain risks and uncertainties that could cause actual results to
differ materially from expectations. Certain of these risks are set forth in
the Company's Annual Report on Form 10-K for the fiscal year ended December
31, 2008, as well as the Company's other reports filed with the Securities and
Exchange Commission.

SOURCE WESCO International, Inc.

Stephen A. Van Oss, Senior Vice President, Finance and Administration of WESCO
International, Inc., +1-412-454-2271, Fax, +1-412-454-2477