UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d)

of the Securities Exchange Act of 1934

Date of Report (Date of earliest event reported): December 23, 2014

Great Lakes Dredge & Dock Corporation

(Exact name of Registrant as specified in its charter)

Delaware	001-33225	20-5336063
(State or other jurisdiction of Incorporation or Organization)	(Commission File Number)	(I.R.S. Employer Identification No.)

2122 York Road

Oak Brook, Illinois 60523

(Address of Principal Executive Offices)

(630) 574-3000

(Registrant’s telephone number, including area code)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

¨ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

¨ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

¨ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

¨ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Item 5.02 — Departure of Directors or Principal Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers

On December 23, 2014, Stephen H. Bittel provided notice of his resignation from the Board of Directors of Great Lakes Dredge & Dock Corporation (the “Company”), effective December 31, 2014. Mr. Bittel’s letter of resignation is attached as exhibit 99.1 hereto. Mr. Bittel’s resignation was not due to any disagreement with the Company or for any matter relating to the Company’s operations, policies or practices.

Our Board extends its sincere gratitude to Mr. Bittel for his years of distinguished service to the Company.

Item 9.01. Financial Statements and Exhibits.

(d) Exhibits.

99.1 Letter of Resignation from Mr. Stephen H. Bittel dated December 23, 2014

2

SIGNATURE

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

	GREAT LAKES DREDGE & DOCK CORPORATION
	/s/ Mark W. Marinko
Date: December 29, 2014	Mark W. Marinko
	Senior Vice President and Chief Financial Officer

3

EXHIBIT INDEX

Exhibit No.	Description
99.1	Letter of Resignation from Mr. Stephen H. Bittel dated December 23, 2014

4