POWER OF ATTORNEY

I, Kenneth Grimbilas, Chairman of the Board of Director of Blue Foundry Bancorp (the “Corporation”), hereby authorize and designate James D. Nesci, Matthew McGoey, Elyse D. Beidner, Kelly Anne Pecoraro, Alexander Agnoletto, Ann Marie Jetton, and John J. Gorman, Marc P. Levy, Zachary Davis and Kari Ritter, of the law firm of Luse Gorman, PC, as my agent and attorney-in-fact, each with full power of substitution and signing singly, to:

(1) prepare and sign on my behalf any Form ID, Form 3, Form 4 or Form 5 under Section 16 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), with respect to the Corporation’s securities and file the same with the Securities and Exchange Commission (the “SEC”) and each stock exchange on which the Corporation’s stock is listed;

(2) prepare and sign on my behalf any Form 144 Notice of Proposed Sale of Securities, under the Securities Act of 1933, as amended (the “Securities Act”), with respect to a sale by me or on my behalf of the Corporation’s securities and file the same with the SEC; and

(3) take any other action of any type whatsoever in connection with the foregoing which, in the opinion of such attorney-in-fact, may be of benefit to, in the best interest of, or legally required by, the undersigned, it being understood that the documents executed by such attorney-in-fact on behalf of the undersigned pursuant to this Power of Attorney shall be in such form and shall contain such terms and conditions as such attorney-in-fact may approve in such attorney-in-fact’s discretion.

The undersigned hereby grants to each such attorney-in-fact full power and authority to do and perform any and every act and thing whatsoever requisite, necessary or proper to be done in the exercise of any of the rights and powers herein granted, as fully to all intents and purposes as the undersigned might or could do if personally present, with full power of substitution or revocation, hereby ratifying and confirming all that such attorney-in-fact, or such attorney-in-fact’s substitute or substitutes, shall lawfully do or cause to be done by virtue of this power of attorney and the rights and powers herein granted. The undersigned acknowledges that the foregoing attorneys-in-fact, in serving in such capacity at the request of the undersigned, are not assuming, nor is the Corporation assuming, any of the undersigned’s responsibilities to comply with Section 16 of the Exchange Act and Rule 144 of the Securities Act.

This Power of Attorney shall remain in effect until the undersigned is no longer required to file Forms 3, 4 or 5 with respect to the undersigned’s holdings of and transactions in securities issued by the Corporation, unless earlier revoked by the undersigned in a signed and dated writing delivered to each of the foregoing attorneys-in-fact or by a new power of attorney regarding the purposes outlined herein dated as of a later date.

Dated: August 29, 2022	/s/ Kenneth Grimbilas
	Kenneth Grimbilas

Grimbilas Kenneth 4