Exhibit 32.1

ADDITIONAL CERTIFICATIONS

Pursuant to 18 U.S.C. Section 1350, the undersigned officer of Michael Baker Corporation (the “Company”), hereby certifies that the Company’s Quarterly Report on Form 10-Q for the quarter ended June 30, 2013 (the “Report”) fully complies with the requirements of Section 13(a) or 15(d), of the Securities Exchange Act of 1934 and that the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

/s/ H. James McKnight	Date: August 8, 2013
H. James McKnight
Office of the Chief Executive, Executive Vice President,
Chief Legal Officer and Corporate Secretary
(Co-Principal Executive Officer)

Pursuant to 18 U.S.C. Section 1350, the undersigned officer of Michael Baker Corporation (the “Company”), hereby certifies that the Company’s Quarterly Report on Form 10-Q for the quarter ended June 30, 2013 (the “Report”) fully complies with the requirements of Section 13(a) or 15(d), of the Securities Exchange Act of 1934 and that the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

/s/ Michael J. Zugay	Date: August 8, 2013
Michael J. Zugay
Office of the Chief Executive, Executive Vice President,
Chief Financial Officer and Chief Administrative Officer
(Co-Principal Executive Officer and Principal Financial Officer)

These additional certifications are being furnished solely pursuant to 18 U.S.C. Section 1350, and are not being filed as part of the Report or as a separate disclosure document.