Bob Brennan Elected Chief Executive Officer of Iron Mountain

June 5, 2008

Longtime CEO Richard Reese to become Executive Chairman of the Board of Directors

BOSTON, June 5 /PRNewswire-FirstCall/ -- Iron Mountain Incorporated (NYSE: IRM), the global leader in information protection and storage services, announced today that its board of directors elected Bob Brennan, 48, president and chief executive officer, making official the elevation first announced in February 2008. He succeeds Richard Reese, who after serving 27 years as CEO, now assumes the new full-time role of executive chairman of the board. Brennan, Iron Mountain's president and chief operating officer since December 2005, was also elected today to the company's board of directors at its annual meeting of stockholders.

(Photo: http://www.newscom.com/cgi-bin/prnh/20080605/NETH066 )

"It is an honor to have the opportunity to lead Iron Mountain into another era of growth," said Brennan. "I'm committed to continue delivering on a promise we've made to customers, which is to help them manage their physical and digital information via integrated storage-as-a-service solutions. We have a unique opportunity to build on our success and brand reputation to further enhance our value to customers and stakeholders, and we intend to take advantage of it."

Brennan takes the helm of a company that has risen to the top of its industry over the last decade. Under Reese's leadership, Iron Mountain acquired more than 200 companies and grew from a regional provider of records storage to the global leader in records management, data protection and information destruction. Revenues during Reese's tenure increased 1,000 fold, from $3 million in 1981 to what is expected to be approximately $3 billion in 2008.

"Iron Mountain is the most recognized and trusted brand in its industry," said Steve Duplessie, founder and senior analyst at the Enterprise Strategy Group (ESG). "Since joining the company, Bob has enhanced the company's ability to leverage its reputation and expertise into new products and markets. The demand for the services Iron Mountain provides has never been higher, and I expect it will accelerate."

During his time as president and COO, Brennan worked with Reese to further establish Iron Mountain as a global provider of information protection and storage services with revenues that grew from $1.8 billion to $2.7 billion between 2004 and 2007. He also helped to develop Iron Mountain Digital into the leading Storage-as-a-Service player with nearly 50 percent compounded annual revenue growth rate over the last three years.

"Iron Mountain has enjoyed a great past, and it's positioned to have a great future," said Reese, who in his new role will focus on driving the company's new services agenda and advising Brennan on strategy and other matters of the business while continuing to perform his duties as chairman of the board. "Bob's the right guy to lead us forward. His management and technology expertise has helped transform Iron Mountain into a technology leader, and it will continue to help the company meet customers' evolving information storage and protection needs."

Brennan joined Iron Mountain in 2004 as president of North America after the company acquired Connected Corporation, where he was chairman and chief executive officer.

About Iron Mountain

Iron Mountain Incorporated (NYSE: IRM) helps organizations around the world reduce the costs and risks associated with information protection and storage. The Company offers comprehensive records management and data protection solutions, along with the expertise and experience to address complex information challenges such as rising storage costs, litigation, regulatory compliance and disaster recovery. Founded in 1951, Iron Mountain is a trusted partner to more than 100,000 corporate clients throughout North America, Europe, Latin America and Asia Pacific. For more information, visit the Company's Web site at www.ironmountain.com.

Forward Looking Statements

This press release contains certain forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995 and federal securities laws, and is subject to the safe-harbor created by such Act. Forward-looking statements include our 2008 financial performance outlook and statements regarding our goals, beliefs, future growth strategies, investments, objectives, plans and current expectations. These statements involve known and unknown risks, uncertainties and other factors that may cause the actual results to be materially different from those contemplated in the forward-looking statements. Such factors include, but are not limited to: (i) the cost to comply with current and future legislation, regulations and customer demands relating to privacy issues; (ii) the impact of litigation that may arise in connection with incidents in which we fail to protect the Company's customers' information; (iii) changes in the price for the Company's services relative to the cost of providing such services; (iv) changes in customer preferences and demand for the Company's services; (v) in the various digital businesses in which the Company is engaged, the cost of capital and technical requirements, demand for the Company's services or competition for customers; (vi) the Company's ability or inability to complete acquisitions on satisfactory terms and to integrate acquired companies efficiently; (vii) the cost or potential liabilities associated with real estate necessary for the Company's business; (viii) the performance of business partners upon whom the Company depends for technical assistance or management and acquisition expertise outside the United States; (ix) changes in the political and economic environments in the countries in which the Company's international subsidiaries operate; (x) claims that the Company's technology violates the intellectual property rights of a third party; (xi) other trends in competitive or economic conditions affecting Iron Mountain's financial condition or results of operations not presently contemplated; and (xii) other risks described more fully in the Company's most recently filed Annual Report on Form 10-K under "Item 1A. Risk Factors". Except as required by law, Iron Mountain undertakes no obligation to release publicly the result of any revision to these forward-looking statements that may be made to reflect events or circumstances after the date hereof or to reflect the occurrence of unanticipated events.

    Investor Relations Contact:         Media Contact:
    Stephen P. Golden                   Dan O'Neill
    Vice President, Investor Relations  Senior PR Manager
    sgolden@ironmountain.com            dan.oneill@ironmountain.com
    (617) 535-2994                      (617) 535-2966

SOURCE Iron Mountain Incorporated

CONTACT: Investor Relations:
Stephen P. Golden, Vice President, Investor Relations
+1-617-535-2994
sgolden@ironmountain.com
or
Media:
Dan O'Neill, Senior PR Manager
+1-617-535-2966
dan.oneill@ironmountain.com
both of Iron Mountain Incorporated

Photo: NewsCom: http://www.newscom.com/cgi-bin/prnh/20080605/NETH066
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Web site: http://www.ironmountain.com