Exhibit 99.1

REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

To the Board of Directors and Shareholders of
Michael Baker Corporation

We have audited the consolidated financial statements of Michael Baker Corporation and subsidiaries (the “Company”) as of December 31, 2008 and 2007, and for each of the three years in the period ended December 31, 2008, and the Company’s internal control over financial reporting as of December 31, 2008, and have issued our reports thereon dated March 9, 2009 (which report on the consolidated financial statements expresses an unqualified opinion and includes an explanatory paragraph regarding the Company’s adoption of Financial Accounting Standards Board Interpretation No. 48, Accounting for Uncertainty in Income Taxes — an Interpretation of FASB Statement No. 109, in 2007), such consolidated financial statements and reports are included elsewhere in this Form 10-K. Our audits also included the consolidated financial statement schedule of the Company listed in Item 15 of Part IV. This consolidated financial statement schedule is the responsibility of the Company’s management. Our responsibility is to express an opinion based on our audits. In our opinion, such consolidated financial statement schedule, when considered in relation to the basic consolidated financial statements taken as a whole, presents fairly, in all material respects, the information set forth therein.

/s/ Deloitte & Touche LLP  

Pittsburgh, Pennsylvania
March 9, 2009