Exhibit 99.1

BAKER REPORTS FINANCIAL RESULTS FOR SECOND QUARTER 2013

PITTSBURGH — Michael Baker Corporation (NYSE MKT:BKR) today announced its financial results for the second quarter of 2013. In addition, the Company’s Board of Directors declared an $0.18 per share dividend for the third quarter of 2013, payable on October 2 to shareholders of record on September 16.

For the quarter, Baker reported net income of $4.8 million, or $0.49 per diluted share, on revenues of $146.1 million, compared to net income of $2.4 million, or $0.25 per diluted share, on revenues of $155.3 million in the second quarter of 2012.

The improvement in second-quarter 2013 net income and earnings per share resulted from increases in both of the Company’s business segments’ operating income. This was due mainly to higher utilization, a decrease in acquisition-related intangible asset amortization expenses, and a reduction in selling, general and administrative costs primarily related to the Company’s performance improvement plan announced in November 2012. These factors were partially offset by the decrease in revenue in the second quarter of 2013, which resulted primarily from a decrease in work performed for the Department of Defense and declines in work performed for certain key Transportation clients.

Selling, general and administrative expenses expressed as a percentage of revenue were 12.2 percent for the current period compared to 14.3 percent for the second quarter of 2013. This decrease is primarily attributable to the period-over-period decrease in SG&A personnel and a general reduction in various overhead expenses, including occupancy and travel costs as part of the Company’s performance improvement plan.

The Company’s effective income tax rate was 37 percent for the second quarter of 2013, compared to 42 percent for the second quarter of 2012.

For the first six months of 2013, the Company recorded net income of $10.3 million, or $1.06 per diluted common share, on revenues of $290.1 million, compared with net income of $4.1 million, or $0.43 per diluted common share, on revenues of $307.0 million in the first half of 2012.

Total backlog at June 30, 2013, was $1.23 billion, compared to $1.65 billion at December 31, 2012. Of these totals, $616 million and $649 million, respectively, are considered funded backlog. The reduction in the total backlog resulted from the removal of $391 million related to the FEMA Risk MAP program, as the Company does not anticipate realizing a majority of the unfunded backlog balance under that contract.

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As of June 30, 2013, the Company had cash and investment balances of $81.7 million, compared to $77.4 million at December 31, 2012, and no debt.

Commenting on the results, H. James McKnight and Michael J. Zugay, office of the chief executive, said, “We are pleased with the improvement we were able to achieve in the second quarter and first six months of 2013. Our revenue, while down from 2012, was in line with our expectations, and our results demonstrate the progress we have made in better aligning our cost structure with the current industry environment. Under our performance improvement plan, our first half results are consistent with our expectations as we entered the year.”

Michael Baker Corporation (www.mbakercorp.com) provides engineering, design, planning and construction services for its clients’ most complex challenges worldwide. The firm’s primary business areas are architecture, aviation, defense, environmental, geospatial, homeland security, municipal & civil, oil & gas, rail & transit, telecommunications & utilities, transportation, urban development and water. With more than 3,000 employees in over 100 offices across the United States, Baker is focused on creating value by delivering innovative and sustainable solutions for infrastructure and the environment.

Conference Call

Michael Baker Corporation has scheduled a conference call and webcast for Thursday, August 8, at 10:00 AM Eastern Daylight Savings Time to discuss these results. Please call 877-769-6805 at least 10 minutes prior to the start of the call. To access the webcast, please visit the investor relations portion of Baker’s website at www.mbakercorp.com.

Note with respect to Forward-Looking Statements:

(The above information contains forward-looking statements concerning our future operations and performance. Forward-looking statements are subject to market, operating and economic risks and uncertainties that may cause our actual results in future periods to be materially different from any future performance suggested herein. Factors that may cause such differences include, among others: the events described in the “Risk Factors” section of our 2012 Form 10-K as well as the Company’s other reports filed with the Securities and Exchange Commission; increased competition; increased costs; changes in general market conditions; changes in industry trends; changes in the regulatory environment; changes in our relationship and/or contracts with the Federal Emergency Management Agency (“FEMA”); changes in anticipated levels of government spending on infrastructure; changes in loan relationships or sources of financing; changes in management; changes in information systems; and divestitures and acquisitions. Such forward-looking statements are made pursuant to the Safe Harbor Provisions of the Private Securities Litigation Reform Act of 1995.)

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FINANCIAL SUMMARY

(Unaudited)

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