POWER OF ATTORNEY

    Know all by these presents, that the undersigned hereby constitutes and
 appoints  each of Joshua B. Deringer, Jonathan Zimmerman, David Williams,
 Kellilyn Greco, Catherin A. DiValentino and Kiara Covarrubias, or either
 of them signing singly, and with full power of substitution, the
 undersigned's true and lawful attorney-in-fact to:

	1. prepare, execute in the undersigned's name and on the
 undersigned's behalf, and submit to the U.S. Securities and Exchange
 Commission (the "SEC") a Form ID, including amendments thereto,
 and any  other documents necessary or appropriate to obtain codes
 and passwords enabling the undersigned to make  electronic filings
 with the SEC of reports required by Section 16(a) of the Securities
 Exchange Act of 1934 or any rule or regulation of the SEC;

	2. execute for and on behalf of the undersigned, in the
 undersigned's capacity as an officer, Board member, investment
 adviser and/or affiliate of an investment adviser of the Thornburg
 Income Builder  Opportunities Trust (the "Trust"), Forms 3, 4,
and 5 in accordance with Section 16(a) of the Securities Exchange Act
 of 1934 and the rules thereunder;

	3. do and perform any and all acts for and on behalf of
 the undersigned which may be necessary or desirable to complete
 and execute any such Form 3, 4, or 5, complete and execute any
 amendment or amendments thereto, and timely file such form with
 the SEC and any stock exchange or similar authority; and

	4. 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'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 Trust assuming, any of the undersigned's responsibilities
 to comply with Section 16 of the Securities Exchange Act of 1934.

	This Power of Attorney shall remain in full force and
 effect until the undersigned is no longer required to file Forms 3,
 4, and 5 with respect to the undersigned's holdings of and
 transactions in securities issued by the Trust, unless earlier
 revoked by the undersigned in a signed writing delivered to the
 foregoing attorneys-in-fact.

	IN WITNESS WHEREOF, the undersigned has caused this
 Power of Attorney to be executed as of this 21st day of July, 2021.


/s/ Benjamin D. Kirby