Digital Realty Trust, Inc. (the REIT) and Digital Realty, L.P. (the Operating Partnership and together with the REIT, the Company) are pleased to offer you the position of Executive Vice President, Telecommunications Infrastructure of the REIT and the Operating Partnership on the following terms, effective as of the date of the closing of the initial public offering of shares of the REITs common stock or such earlier date as may otherwise be mutually agreed to by you and the Company (the Effective Date):

POSITION, DUTIES AND RESPONSIBILITIES. As of the Effective Date, provided that the Operating Partnership shall have acquired all of the properties and assets that are covered in that certain Contribution Agreement, dated as of July 31, 2004, entered into among the Operating Partnership, San Francisco Wave eXchange, LLC, Santa Clara Wave eXchange, LLC, and eXchange colocation, LLC, the Company will employ you, and you agree to be employed by the Company, as Executive Vice President, Telecommunications Infrastructure of the REIT and the Operating Partnership. In the capacity of Executive Vice President, Telecommunications Infrastructure, you will have such duties and responsibilities as are normally associated with such position. Your duties may be changed from time to time by the Company, consistent with your position. You will report to the Chief Executive Officer of the REIT or the Operating Partnership, as applicable, and will work full-time at our principal offices located in Menlo Park, California (or such other location in the San Francisco greater metropolitan area as the Company may utilize as its principal offices), except for travel to other locations as may be necessary to fulfill your responsibilities. At the Companys request, you will serve the Company and/or its subsidiaries and affiliates in other offices and capacities in addition to the foregoing. In the event that you serve in any one or more of such additional capacities, your compensation will not be increased beyond that specified in this letter. In addition, in the event your service in one or more of such additional capacities is terminated, your compensation, as specified in this letter, will not be diminished or reduced in any manner as a result of such termination for so long as you otherwise remain employed under the terms of this letter.